Hawaii is the only U.S. state in the tropics, the only one whose modern wood-frame practice was written into existence by a single Category 4 landfall, and the only one that fragments wind-code adoption across four independent county authorities sitting on top of a state baseline. Hurricane Iniki struck Kauai on September 11, 1992 with sustained 145 mph winds and gusts above 175 mph. Ten years later — in 2002 — WindLoadCalc launched, with the post-Iniki forensic engineering literature already locked in as the foundation of how we treat Hawaii. SkyCiv, the platform most often compared to us today, was founded in 2013 in Sydney. Twenty-one years after Iniki. Eleven years after we did.

That gap is the entire point of this page. A generic global calculator can hand you a ZIP lookup. What it cannot hand you is twenty-four years of tracking how Honolulu DPP, Maui DPW, Kauai DPW, and Hawaii County DPW adopt and amend the State Building Code on independent timelines, of watching engineers get burned by tools that quietly merged tsunami inundation cases into hurricane wind cases, of building Special Wind Region alerts into the engine because the central Maui isthmus and Kauai ridge sites are not generic Exposure C, of knowing that on Big Island the conversation also includes vog corrosion and ash loading near Kilauea. Enter a Hawaii ZIP above and the calculator launches preloaded with the right county, the ASCE 7-16 baseline value, an SWR alert if your site is inside a designated special wind region, and the Exposure D default along any windward open-ocean shore.

Hawaii expertise since 2002 — what twenty-four years actually buys you

10 yrs Post-Iniki when we launched. The forensic literature was already settled practice.
4 / 4 Hawaii county adoptions tracked — Honolulu DPP, Maui DPW, Kauai DPW, Hawaii County DPW.
3 codes Trade winds, hurricane wind (ASCE 7-16 Ch. 26-30), tsunami (Ch. 6) — held separate. Never conflated.
11 yrs Head start over SkyCiv (2013, Sydney). The age advantage is not a feature competitors can ship.

Calculating Hawaii wind loads online before SkyCiv had a Sydney office. WindLoadCalc has been generating permit-ready wind load reports across seven ASCE 7 editions — 7-95, 7-98, 7-02, 7-05, 7-10, 7-16, 7-22 — for U.S. coastal and hurricane-zone work, including Hawaii since the calculator first shipped in 2002. Hawaii's exposure is not Florida's, and our engine has known that for over twenty-four years.

What "Hawaii-ready" actually means on this calculator

Hawaii wind load done right reads the ASCE 7-16 island maps correctly, raises a Special Wind Region alert on every site where the standard map value is not controlling (interior Maui isthmus, windward slopes, ridge sites, the Pali, anywhere ASCE 7-16 Section 26.5.3 expects rational topographic refinement), defaults to Exposure D along the windward open-ocean coastline of every island, keeps daily trade-wind serviceability questions separate from Cat-4 hurricane design and both of those separate from ASCE 7-16 Chapter 6 tsunami loading, surfaces Big Island volcanic exposure considerations on Hawaii County projects, and produces a report a Hawaii-licensed PE under HRS Chapter 464 will accept as the analysis basis for a sealed permit submittal. WindLoadCalc does each of those, and has since 2002 — the only U.S. wind load calculator on the web at the time.

ASCE 7-16 Wind Speeds Across the Hawaiian Chain

Population centers across the four counties cluster between roughly 105 and 130 mph under ASCE 7-16 Risk Category II — far below Florida's coastal 140 to 180 mph range, but with an Iniki-class tail event that controls every connection schedule on the island. The table below lists representative design wind speeds for representative ZIPs on each island. The calculator engine returns the precise ASCE 7-16 value for any Hawaii ZIP you enter and flags Special Wind Region sites where the standard map is not controlling under Section 26.5.3.

City / Island County Sample ZIP Risk Cat II Wind Speed Hawaii-specific notes
Honolulu (downtown) City & County of Honolulu (Oahu) 96813 ~105–115 mph Leeward urban core under Honolulu DPP; state baseline applies
Waikiki / Diamond Head City & County of Honolulu 96815 ~110–120 mph Exp D South-shore open ocean — Exposure D defaults on; lanai uplift fatigue real
Kaimuki / Kahala City & County of Honolulu 96816 ~105–115 mph South Oahu residential — partially-open enclosure common for lanai screens
Wailuku Maui County (Maui DPW) 96793 ~115–130 mph SWR check Central Maui isthmus — topographic channeling between West Maui & Haleakala
Kahului Maui County (Maui DPW) 96732 ~115–130 mph SWR check North Maui shore + isthmus exposure — refine basic V per Sec. 26.5.3
Lihue Kauai County (Kauai DPW) 96766 ~105–125 mph Iniki landfall island — connection schedule + continuous load path govern
Hilo Hawaii County (DPW) 96720 ~105–125 mph Windward Big Island — also a 1946 / 1960 tsunami history city (separate code)
Kailua-Kona Hawaii County (DPW) 96740 ~105–115 mph Leeward Big Island — vog corrosion + South Flank volcanic exposure overlay

The standard ASCE map is not the controlling answer for every Hawaii ZIP

ASCE 7-16 Section 26.5.3 designates portions of the Hawaiian Islands as Special Wind Regions, which is the standard's way of saying out loud that the contours on the printed map do not capture Pali winds, central Maui isthmus channeling, or windward ridge acceleration on Kauai and the Big Island. On any SWR site the design engineer is required to determine the basic wind speed using regional climatic data and a rational topographic analysis — and Section 26.8 brings in a topographic factor Kzt above 1.0 where the site sits on a ridge, in a saddle, or on a steep windward slope. WindLoadCalc returns the ASCE 7-16 baseline plus the SWR alert. Your Hawaii-licensed PE refines from there. A calculator that hides this step behind a single ZIP lookup is selling Hawaii a Florida tool.

The Four-County Adoption Maze — Decoded for 24 Years

No other state structures wind-code adoption the way Hawaii does. There is one State of Hawaii Building Code (IBC + ASCE 7-16) sitting underneath, and then four independent county authorities — each its own permit office, each adopting the state baseline on its own timeline, each stacking local amendments on top. WindLoadCalc has tracked all four since the calculator launched in 2002. SkyCiv, which entered the market eleven years later from Sydney, treats Hawaii as one row in a global ZIP catalogue. The mosaic below is the practical difference.

City & County of Honolulu

Oahu

The state's population center and largest permit office — Honolulu DPP (Department of Planning and Permitting) covers all of Oahu, from Pearl City to Kaneohe to Waianae. Honolulu typically tracks the State Building Code baseline closely; amendments are lighter touch than Maui or Kauai. The single permit authority for the entire island.

Maui County

Maui + Lanai + Molokai

Maui DPW permits across three islands. Post-Iniki amendments tightened connection requirements and high-wind detailing; post-Lahaina (the 2023 wildfire) added scrutiny on rebuild detailing and fire-related provisions that intersect the wind code at the connector schedule. Special Wind Region scrutiny matters on every central-isthmus and West Maui ridge site.

Kauai County

Kauai + Niihau

The island Iniki actually hit — and the county where continuous load path detailing, hurricane clip installation, and gable-end bracing carry the most aggressive plan-review attention. Kauai DPW Building Division covers Kauai and privately-held Niihau. Single-family wood-frame work here is reviewed against the lessons the storm taught the building department in 1992.

Hawaii County (Big Island)

Hawaii Island

The only one of the four with active volcanism inside its jurisdiction — Kilauea and Mauna Loa. Hawaii County DPW layers volcanic-exposure provisions (lava zone overlays, ash-load considerations on slopes near eruption events, vog-driven corrosion specs on connector hardware) onto the ASCE 7-16 wind code. No other Hawaii county has this layer; no continental U.S. county does either.

Practical consequence: a Maui project may need connector hardware a Honolulu project does not. A Kauai single-family rebuild gets plan-review eyes on its gable bracing that an Oahu rebuild may not. A Hawaii County south-flank project may carry corrosion specs and lava-zone disclosures the other three counties never see. WindLoadCalc returns the ASCE 7-16 baseline that all four counties use as the analysis basis; the county-specific amendments are a conversation the engineer of record has with the right DPW or DPP plan reviewer at the detailing stage. We can hand them a clean baseline because we have been watching all four adopt code for over two decades.

Hurricane Iniki, September 11, 1992 — Why This Calculator Exists

Iniki made landfall on the south shore of Kauai as a Category 4 storm. Sustained winds were estimated at 145 mph with gusts well above 175 mph. Iniki remained the strongest hurricane to strike Hawaii in recorded history; Hurricane Lane in 2018 matched the intensity offshore as a Category 5 but did not make landfall, and Tropical Storm Olivia later that same year made Maui landfall at much lower intensity. Iniki is still the storm of record, and the storm every working Hawaii structural engineer references when explaining what their connection schedules are actually designed against.

What Iniki did to Kauai — and what the forensics changed

Roughly 14,000 structures destroyed or severely damaged. Approximately 1,400 Kauai homes destroyed outright. Estimated property loss above $3.1 billion in 1992 dollars (over $6.5 billion in 2026 dollars). Power and potable water gone for weeks. The FEMA Building Performance Assessment Team, the National Institute of Standards and Technology, and the structural engineering community walked the wreckage and catalogued the same failure modes repeating across the island — uplifted roofs, gable-end blowouts, garage doors that failed and pressurized interiors until the roof ballooned off, broken roof-to-wall connections. Member sizes had held; connections had not. The forensic record was clear by 1993, and Hawaii construction practice changed permanently as a result. Ten years later, WindLoadCalc launched into that already-changed reality.

Three things the post-Iniki literature drove into standard Hawaii practice — and that this calculator surfaces as a result:

This is why the calculator exists in the form it does, and why it has not changed that emphasis in twenty-four years. A platform that arrived in the market in 2013, well after this practice settled, can list ASCE 7 numbers next to a Hawaii ZIP. What it cannot do is build the engine around the lessons Iniki taught — because it was not here to take the lessons.

Trade Winds, Storm Surge, Tsunami, Volcano — Four Different Codes, Four Different Calculations

Hawaii is the only U.S. state where the design environment stacks four physically distinct loading regimes onto a single coastal structure, and where confusing any two of them produces dangerously wrong answers. This calculator separates them on purpose. A generic platform that quietly merges them is the failure mode we built the engine to avoid.

Trade winds — the daily 15-to-25 mph serviceability load

The northeast trade flow runs across the islands most of the year at speeds well below ASCE 7-16 design thresholds — typically 15 to 25 mph, gusting to 35 mph in stronger trade conditions. Structurally trade winds do not control sizing. Operationally they fatigue everything that touches the building envelope: window seal cycling, screen tear on lanai enclosures, lanai roof uplift fatigue, awning hinge wear, persistent salt-laden corrosion on every exposed connector. Hawaii engineers who have been at this for decades will often spec heavier hardware on exposed-coast residential than a clean ASCE 7-16 calculation requires, because the daily trade-wind load grinds components that survive a single design event but do not survive thirty years of cycling. WindLoadCalc surfaces this as a serviceability consideration on coastal Hawaii output — separate from the hurricane design pressures.

Storm surge — FEMA FIRM territory, coordinated with the wind code

Coastal Hawaii is subject to storm surge during hurricane landfall, but surge elevation requirements come from the FEMA Flood Insurance Rate Maps, not from ASCE 7. A south-shore Honolulu lot may sit in a V-zone with breakaway-wall and freeboard requirements that interact with the ASCE 7-16 wind pressures the calculator returns — both calculations have to satisfy the permit, and they are run independently before being assembled at the design stage.

Tsunami exposure — ASCE 7-16 Chapter 6. Not the wind code. Never the wind code.

Hawaii has tsunami inundation zones along most coastlines, particularly on every island's windward face and in low-lying coastal communities. Hilo has been devastated by tsunamis twice in living memory — April 1, 1946 (159 dead, generated by an Aleutian seismic event with no wind component at all) and May 23, 1960 (61 dead, generated by the Great Chilean Earthquake). Neither was a wind event. Both events drove tsunami inundation modeling that is now codified in ASCE 7-16 Chapter 6 (Tsunami Loads and Effects), and that code is run independently from the wind code on any Hawaii project inside a tsunami design zone. Conflating tsunami loading with wind loading produces wrong numbers in both directions, and Hawaii is the U.S. state where this trap is most likely to bite — because it is the only state where both regimes apply seriously and simultaneously. WindLoadCalc returns ASCE 7-16 wind loads only. Tsunami inundation is a separate Chapter 6 calculation your engineer runs alongside, and the governing forces are reconciled at the design stage. A calculator that hands you a single Hawaii "load number" is hiding something. We don't.

Volcanic exposure — Hawaii County only, on top of the wind code

Big Island sits on Kilauea and Mauna Loa, and active basaltic volcanism creates two structural design considerations the wind code itself does not capture. Volcanic ash on roofs during eruption events adds transient roof loading on top of whatever ASCE 7-16 wind, snow, or rain combination is controlling — particularly relevant in lava zones 1 through 3 and on roof slopes that do not shed ash. Vog (volcanic fog — sulfur dioxide plus water vapor plus fine particulate) accelerates corrosion of metal connectors and exposed steel at rates coastal Florida engineers literally do not see. The result is more aggressive corrosion-resistance specs on the same hurricane clips and continuous load path hardware Kauai post-Iniki practice already requires. Honolulu, Maui, and Kauai projects do not have this overlay. Hawaii County projects do, and the calculator flags it on Big Island ZIPs because it is not the kind of thing a Sydney-based engine will mention.

Running a Hawaii Wind Load on This Calculator

Drop in your Hawaii ZIP — engine routes to the correct county and flags SWR sites automatically

Enter the ZIP, and the engine maps it to one of the four Hawaii county authorities — Honolulu DPP, Maui DPW, Kauai DPW, or Hawaii County DPW — pulls the ASCE 7-16 baseline wind speed, defaults Exposure D for any windward open-ocean site within one mile of unobstructed coastline, and raises a Special Wind Region alert per Section 26.5.3 if the ZIP centroid sits inside a designated SWR (central Maui isthmus, windward slopes, the Pali, ridge sites on Kauai and the Big Island). Big Island ZIPs additionally surface the vog corrosion and lava-zone considerations the other three counties do not face.

Choose Risk Category by what your Hawaii project actually is

In Hawaii, Cat II covers most of the four counties' permit volume — Honolulu single-family, Maui condos, Big Island custom homes, Kauai resort renovations. Cat III adds larger DOE schools above the occupancy threshold and the assembly buildings (Hawaii Convention Center, the larger Waikiki venues, the major resort ballrooms). Cat IV picks up Queen's, Kapiolani, Maui Memorial, the county fire and EMS facilities, and the county and state EOCs — every facility that has to remain functional through and after the next Iniki-class event.

Confirm Exposure and topographic factor — Hawaii is rarely generic Exposure C

Exposure D defaults on for any site within one mile of unobstructed open ocean — which is most of populated coastal Hawaii. Exposure C applies inland for suburban and rural sites without dense canopy or surrounding buildings. Exposure B applies in tropical-canopied or building-shielded interiors (parts of Manoa, parts of upcountry Maui). On any ridge, saddle, central isthmus, or steep windward slope your Hawaii-licensed PE applies a topographic factor Kzt above 1.0 per ASCE 7-16 Section 26.8 — the calculator surfaces the flag, the PE refines the number.

Enter geometry — Hawaii output leads with the connection schedule, not just the pressure table

Building footprint, mean roof height, X-in-12 pitch, and roof shape drive both C&C and MWFRS engines. Output for Hawaii leads with MWFRS (and the connection schedule the post-Iniki Hawaii engineering community treats as more important than member sizing) plus C&C broken into Zone 4 wall field, Zone 5 corner, and the appropriate roof zones for your shape — lanai screens read directly off the partially-open enclosure pressures so screen contractors get a number they can specify mesh against.

Hand the report to your Hawaii-licensed PE for sign and seal under HRS Chapter 464

Export as PDF, real-Excel (.xlsx) architectural schedule for AutoCAD drop-in, or CSV. Hawaii Revised Statutes Chapter 464 requires that engineering work for permit purposes in Hawaii be sealed by a Hawaii-licensed engineer — and our in-house PE is Florida-only, three stories or less, so we explicitly do not seal Hawaii reports. The output is built to be the clean analysis basis your island engineer reviews, takes responsibility for, and seals under their own license. Most Hawaii engineers we have worked with over twenty-four years are comfortable with exactly that workflow.

Pull ASCE 7-16 Hawaii Wind Loads for Your PE

Enter your ZIP. The engine routes to the right county, raises the Special Wind Region alert if your site needs one, separates trade winds and tsunami from the hurricane load, and produces a report HRS Ch. 464 Hawaii PEs will sign and seal under their own review.

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Hawaii Wind Load FAQ — Answered by 24 Years of Doing This

Why does WindLoadCalc separate trade winds from tsunami code from wind code? Most calculators don't.
Because in Hawaii these are three completely different problems and conflating them gets buildings designed wrong. Trade winds are a daily serviceability and fatigue load — the 15 to 25 mph northeast flow that runs across the islands most of the year, well below ASCE 7-16 design speeds, but real for window seal cycling, lanai uplift fatigue, and salt-laden connector corrosion. Hurricane wind loads come from the Cat 4 Iniki-class tail of the distribution and are governed by ASCE 7-16 Chapters 26 through 30. Tsunami loads come from ASCE 7-16 Chapter 6 (Tsunami Loads and Effects), driven by Pacific seismic sources, and have nothing to do with the wind code — Hilo has been devastated by tsunamis in 1946 and 1960 with no wind component at all. A generic calculator that treats Hawaii as a ZIP code with one wind speed cannot distinguish these three. WindLoadCalc does, because we have been working Hawaii since 2002 and we have watched engineers get burned by tools that quietly merged a tsunami inundation case into a hurricane wind case and produced a single useless number.
How long has WindLoadCalc been doing Hawaii — and why does that matter post-Iniki?
WindLoadCalc launched in 2002 — exactly ten years after Hurricane Iniki struck Kauai on September 11, 1992 as a Category 4 storm with sustained 145 mph winds and gusts above 175 mph. By the time we shipped, the post-Iniki forensic engineering literature was complete, the Hawaii counties had already started rewriting connection-detailing requirements, hurricane clips had moved from optional to standard, and the lesson that connections (not member sizes) govern Hawaii wood-frame design was settled practice. We built the calculator into that reality from day one. SkyCiv, by contrast, was founded in Sydney in 2013 — twenty-one years after Iniki and eleven years after WindLoadCalc — and treats Hawaii as one entry in a global ZIP catalogue rather than as the only U.S. tropical archipelago with a Cat-4-landfall forensic record reshaping its codes. We have been here for over 24 years and seven ASCE editions (7-95, 7-98, 7-02, 7-05, 7-10, 7-16, 7-22). Iniki is not history to us — it is the reason this calculator exists in the form it does.
Do the four Hawaii counties actually adopt different codes? Isn't there a state code?
Yes, and yes. The State of Hawaii Building Code provides a uniform IBC-plus-ASCE-7-16 baseline, but each of the four counties — City and County of Honolulu, Maui County, Kauai County, and Hawaii County / Big Island — adopts the state code on its own timeline and stacks its own local amendments on top. Honolulu DPP (Department of Planning and Permitting) tends to track the state baseline closely. Maui DPW carries post-Iniki and post-Lahaina amendments tightening connection requirements and high-wind detailing. Kauai DPW Building Division — the agency for the island Iniki actually hit — places particularly aggressive emphasis on continuous load path detailing and hurricane clip installation on every residential permit. Hawaii County DPW layers in provisions for Big Island volcanic exposure that the other three counties never see. The county is the permit authority. The state code is the floor, not the ceiling. WindLoadCalc has tracked all four county adoptions for over two decades — a generic global calculator cannot, because it doesn't know the maze exists.
What does ASCE 7-16 actually say about Hawaii wind speeds — including special wind regions?
Under ASCE 7-16 mapping the populated parts of Oahu (Honolulu ZIPs 96813, 96815, 96816), Maui (Wailuku 96793, Kahului 96732, Kihei 96753), Kauai (Lihue 96766, Princeville 96722), and Hawaii County (Hilo 96720, Kailua-Kona 96740) sit in roughly the 105 to 130 mph Risk Category II range. ASCE 7-16 also designates portions of the Hawaiian Islands as Special Wind Regions per Section 26.5.3, meaning the basic wind speed on the standard map is not necessarily controlling — the engineer of record is required to determine the basic wind speed using regional climatic data and a rational analysis of topographic acceleration where the site sits on a ridge, in a saddle, in the central Maui isthmus between West Maui and Haleakala, or on a steep windward slope. Coastal Exposure D applies along every island's open-ocean shoreline by default. The WindLoadCalc engine returns the baseline ASCE 7-16 value and raises an SWR alert where the ZIP centroid sits inside a designated special wind region; the Hawaii-licensed engineer of record refines from there using Section 26.5.3 and applies a topographic factor Kzt above 1.0 per Section 26.8 when warranted.
Does WindLoadCalc PE-stamp Hawaii reports?
No. WindLoadCalc's in-house P.E. is licensed in the State of Florida only, restricted to projects three stories or less — that scope does not extend to Hawaii. Hawaii Revised Statutes Chapter 464 requires that any engineering work performed for permit purposes in Hawaii be sealed by an engineer holding an active Hawaii license. WindLoadCalc generates the underlying ASCE 7-16 wind pressure calculation, the connection-uplift schedule, the Zone 4 / Zone 5 / roof-zone C&C breakdown, and the report content in the format Hawaii plan reviewers expect — and your Hawaii-licensed structural or civil engineer reviews it, takes responsibility for the analysis, and seals the document for permit submittal. Most island engineers we have worked with over 24 years will accept a clean WindLoadCalc report as the analysis basis and seal it under their own review. What we don't do is pretend our Florida-only PE service applies across the Pacific.
Why do Hawaii engineers care more about connections than member sizes?
Because Iniki forensics proved that members survive Cat 4 wind loads and connections do not — and that lesson is now built into how every working Hawaii structural engineer talks about wood-frame design. When the FEMA Building Performance Assessment Team and the NIST investigators walked the wreckage on Kauai in late 1992 and early 1993, they catalogued failure after failure where 2x rafters and studs were intact but the metal connectors, toe-nails, and gable-end bracing had let go — roofs lifted whole off walls, walls peeled away from sills, gable ends pushed inward, garage doors failed and pressurized interiors until roofs ballooned off within minutes. The post-Iniki literature drove continuous-load-path detailing into standard Hawaii residential practice and made hurricane clips, metal connectors, and rated garage doors baseline rather than optional. A Hawaii wind load report that emphasizes member sizing and treats the connector schedule as an afterthought is reading the problem backwards. WindLoadCalc surfaces the uplift loads and the connection schedule alongside the pressure tables because the post-Iniki Hawaii engineering community has been clear since 1993 that this is where Hawaii designs actually fail.
What does the Big Island add that the other three counties don't have?
Volcanic exposure, full stop. Hawaii County is the only one of the four counties with active basaltic volcanism inside its jurisdiction — Kilauea on the south flank and Mauna Loa above it. That changes structural design in two ways the wind code itself does not capture. First, volcanic ash loading on roofs during eruption events adds a transient roof load on top of whatever ASCE 7-16 wind load and snow/rain combination is already controlling — relevant in lava zones 1, 2, and 3 and on roof slopes that don't shed ash readily. Second, vog (volcanic fog — sulfur dioxide plus water vapor plus fine particulate) accelerates corrosion of metal connectors, fasteners, and exposed steel by a factor that coastal Florida engineers literally do not see, and that drives Hawaii County projects toward more aggressive corrosion-resistance specs on the same hurricane clips and continuous load path hardware Kauai post-Iniki practice already requires. Honolulu, Maui, and Kauai projects do not face this. Big Island projects do. WindLoadCalc returns the ASCE 7-16 wind load values that apply across all four counties; the volcanic loading and vog corrosion overlay is a Hawaii County conversation the engineer of record has with the building official.
How is Hawaii's hurricane code different from Florida's, when you've been doing both since 2002?
Three concrete differences worth knowing if you work both markets. (1) ASCE edition: Hawaii references ASCE 7-16 through the current State Building Code adoptions; Florida is on ASCE 7-22 under FBC 8th Edition (2023) — so the same calculation done on identical geometry returns slightly different pressures depending on which state you're in. (2) Jurisdictional shape: Florida has one statewide FBC with two HVHZ counties (Miami-Dade and Broward) carrying NOA / TAS 201 / TAS 202 / TAS 203 product approval overlays, while Hawaii fragments into four county adoptions each with its own amendments — there is no Hawaii HVHZ analog, but there are four code mosaics to track instead of one. (3) Design speed range: Florida coastal Risk Category II ranges roughly 140 to 180 mph (Collier 170, Broward 170, Miami-Dade 175, Keys ~180), while most populated Hawaii ZIPs sit at 105 to 130 mph — Hawaii's lower numbers reflect that historical Cat-4 hurricane landfalls have been less frequent than along the U.S. southeast coast, but the design still has to absorb the Iniki-class event when it comes. WindLoadCalc has been navigating both markets since 2002 — that is the practical reason we kept Florida and Hawaii on separate landing pages with separate engines rather than rolling everything into one global form like SkyCiv does.

Pacific-Basin & ASCE 7-16 reference set

From Honolulu to Hilo to Hana — One Calculator, All Four Counties

ASCE 7-16 wind loads for any Hawaii ZIP across Honolulu DPP, Maui DPW, Kauai DPW, and Hawaii County DPW. SWR-aware, trade-winds-and-tsunami-separated, formatted for HRS Chapter 464 Hawaii PE review. The post-Iniki calculator since 2002.

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Last updated: May 23, 2026 · Wind load calculations since 2002, online since 2006 · Reviewed by an in-house Florida-licensed P.E. (Hawaii reports sealed by your Hawaii-licensed PE under HRS Ch. 464) · Questions? support@windloadcalc.com