Pick a calculator from the home page, fill in all required inputs, and press calculate. If you are unsure about a value, check the placeholder or tooltip for guidance.

Differences usually come from rounding, intermediate assumptions, or the chosen design code. You can review the calculation steps and compare against standard examples on the Validation page.

Yes. Guests can calculate and draw, but saves are stored in your browser and the Free quota applies.

Guests keep data in browser localStorage. Logged-in users sync to Supabase through your AIVerID account.

ACI 318-19, Thai DPT 1008-61, Eurocode 2, AISC 360, EC3, IS800, and others depending on the calculator.

The Free plan allows 3 calculations per day. Drawing and local saves are fully available. Upgrade to Pro for unlimited calculations. See the pricing page for details.

DXF is a CAD interchange format that requires ongoing maintenance, so it is a Pro benefit. Drawing, saving, and PDF plotting remain free.

Use the language switcher in the header to switch between 13 languages. Units are set per calculator and use primary SI units such as meters, kilonewtons, and megapascals.

Reports are design aids, not an engineer's certification. The signing engineer must verify values, assumptions, and suitability for the actual project before submission.

Save a calculation to a project, or use the project permalink to share a link with others. The link references the owner's latest data.

A stale result is output from a previous calculation whose inputs have since changed. The app shows a banner so you recalculate.

The Drawing Handbook here lists every command plus concepts such as layers, marks, sheets, and export. In-app help is also available by pressing ? on the canvas.