Start with the free calculator in every section — no sign-up needed. Upgrade only when you need the full library and the professional workflow.
Every plan keeps the same clean calculation experience. Pro simply unlocks the complete library and professional extras.
Prices in US dollars. VAT or sales tax is added at checkout where required. Paid plans renew automatically at the end of each billing period until cancelled; you can cancel any time and keep access until the period ends. Orders are processed by Paddle.com, our Merchant of Record. See the Terms of Service and Refund Policy. Pro calculators are locked until Pro checkout opens.
The first calculator in each section — marked Free: Simple Beam with uniform load, Pinned-Base Portal Frame, Three-Hinged Parabolic Arch, Simply Supported Rectangular Plate and Rectangle & Box section. Use them without an account; a free account adds their PDF and Word reports.
Not to use the free calculators. A free account (Google or Facebook sign-in) is needed to download their reports, and a Pro plan for the rest of the library.
As a single payment of $99.99 covering 12 months, renewing automatically each year until you cancel. It is not split into monthly charges.
Yes, any time — Monthly or Yearly. You keep access until the end of the billing period you have already paid for, and you will not be charged again.
Pro includes commercial use. Final engineering designs must still be reviewed by the responsible licensed engineer.
Yes — a full refund within 14 days of a purchase or renewal. See the Refund Policy.
Payments are processed securely by Paddle, our Merchant of Record. Depending on your country you can pay by card, PayPal or local methods; Paddle also issues the invoice and handles sales tax.
Use Hand Calc free, or unlock the complete engineering library when your workflow grows.
Create your free account