> ## Documentation Index
> Fetch the complete documentation index at: https://calcs.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Calculate Wind Loads to AS/NZS 1170.2:2021
> Calculate wind loads to AS/NZS 1170.2:2021 for the 8 cardinal directions or the worst-case direction, with worked examples and a webinar.
Calcs.com includes an easy to use Wind Load Calculator to AS1170.2 that allows the quick determination of wind loads for 8 cardinal directions, or worst case direction. The below help video demonstrates a simple and complex worked example for how to use the calculator. Scroll down further for a full length webinar on Wind Design to AS1170.2, as well as accompanying slides.
## Method & scope
| Property | Detail |
| ---------------- | -------------------------------------------------------------------------------------------------- |
| Design standards | AS/NZS 1170.2:2021 |
| Regions | Australia & New Zealand |
| Who it's for | Australian and New Zealand structural engineers required to use AS/NZS 1170.2:2021 under NCC 2022. |
#### See the exact clause
Every check in this calculator links back to its governing clause in AS/NZS 1170.2:2011. Open the **Formula Reference** panel on any result and select the clause reference to read it. See [Viewing Clauses from Inside a Calculator](/docs/running-calculations/standards-and-codes/viewing-clauses-from-inside-calculator).
#### About this calculator
Calculate site and design wind pressures to AS/NZS 1170.2:2021 in minutes. Terrain category, topography, shielding, and directionality can all be overridden for complex sites. Code references are shown on every output.
## How to use it
Open it from **Run calc** in the About this calculator panel above.
Work through the input sections from top to bottom. Click any input label to see its reference explanation, clause, conditions and assumptions. See [Checks, References, Conditions and Assumptions](/docs/running-calculations/checking-results/checks-references-conditions-assumptions).
Check the utilization of each governing check in the summary, then export a PDF report. See [Views and Export](/docs/running-calculations/exporting-reports/views-and-export).
#### Simple and Complex Wind Worked Example Video
#### AS1170.2 Wind Design Webinar Video
#### AS1170.2 Wind Design Webinar Slides
**[Wind Design to AS/NZ 1170.2 Webinar Slides - Calcs.com](https://www.slideshare.net/clearcalcs/wind-design-to-asnz-11702-webinar-slides-Calcs.com "Wind Design to AS/NZ 1170.2 Webinar Slides - Calcs.com")** from **[Calcs.com](https://www.slideshare.net/clearcalcs)**
## Common questions
The calculator implements AS/NZS 1170.2:2021, Structural design actions: Wind actions. This is the 2021 edition required under NCC 2022, which introduced updated wind regions (including new Region D boundaries), revised terrain category definitions, and the optional Climate Change Multiplier for design wind speeds.
Key inputs are wind region and design return period, terrain category (TC1 through TC4), site topography (hill, escarpment, or flat), shielding parameter, building height and plan dimensions, structure importance level, and cardinal direction weighting. Topographic multiplier (Mt), shielding multiplier (Ms), and directionality multiplier (Md) can each be overridden if site-specific data is available.
Outputs include regional wind speed (VR), site wind speed (Vsit,b) for each wind direction, design wind speed (Vdes,θ), velocity pressure (qz,des), and external and internal pressure coefficients for each building surface zone. Code clause references are shown alongside every calculated value.
Yes. The 2021 edition introduced an optional Climate Change Multiplier (Mcm) to account for projected increases in wind speeds due to climate change. The calculator allows you to apply or omit Mcm depending on project requirements and client or AHJ direction.
The 2021 revision updated wind region boundaries (particularly in coastal Queensland), revised terrain category multiplier tables, introduced the Climate Change Multiplier, and aligned definitions more closely with international standards. If your project is under NCC 2019 or earlier, use the AS/NZS 1170.2:2011 calculator. For NCC 2022 projects, this 2021 version is required.
Yes. The 'Wind Loads for Load Linking' table in the results can be linked to any Calcs.com structural design calculator in the same project. When you change a site input, wind region, terrain category, or building dimensions, all linked design calculations update automatically. No manual re-entry of wind loads between calculations.
