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Pricing

One free calculator in every section, forever. Annual plans unlock the whole library — no monthly billing, no surprises.

Launch period: every calculator — including the Pro library — is open while online checkout is being activated. Choose a plan and e-mail us — we will activate it as soon as checkout opens.

Free

$0forever
Try the workflow with one calculator in every section.
  • 1 calculator per section (7 total)
  • Live diagrams & point analysis
  • SI / Imperial toggle
  • Printable PDF output
  • Full library
  • Saved calculations
Open free calculators

Student

$10/ year
Full access with a valid university e-mail.
  • All calculators, all sections
  • Live diagrams & point analysis
  • SI / Imperial toggle
  • Printable PDF output
  • Saved calculations (25)
  • Commercial use
Choose Student

Professional

$19/ year
For practising engineers. Everything, unlimited.
  • All calculators, all sections
  • Live diagrams & point analysis
  • SI / Imperial toggle
  • Printable PDF with your project header
  • Unlimited saved calculations
  • Commercial use licence
Choose Professional

Team

$29/ year · 5 seats
Small offices and teaching groups.
  • Everything in Professional
  • 5 user seats, one invoice
  • Shared saved calculations
  • Company logo on reports
  • Priority calculator requests
  • Invoice / PO billing
Choose Team

Questions

Which calculators are free?

The first calculator in each section — for example, Simple Beam with Uniformly Distributed Load — is free, including the printable report.

Can I use results in real projects?

Professional and Team plans include a commercial licence. All results are for preliminary design and must be verified by a licensed engineer.

Do you offer refunds?

Yes — full refund within 14 days of purchase, no questions asked.

How do you verify student status?

Sign up with a university e-mail address (.edu, .ac.xx, .edu.xx). Manual verification is available for others.

Which payment methods?

Credit/debit cards, PayPal and local methods via Paddle, our Merchant of Record. Prices are in USD; VAT / sales tax is added at checkout where required.

Can I request a calculator?

Yes. Every plan can request new cases; Team requests are prioritised in the roadmap.