The calculators are free. They always will be.
Nothing on this page changes a number a calculator gives you. Premium is for the work around the maths — sending a customer a quote that looks like your business, and pricing a catalogue instead of one product at a time.
Free
No account required. No card. Not a trial.
- All 40 calculators, with no account
- Every formula published and unit-tested
- Printable results, CSV export and share links
- Embed any calculator on your own site
- Save 3 machines and 10 materials
- Your inputs never leave your browser
Premium
For makers selling to customers.
- Branded quotes — your logo, terms and deposit, on a link you send a customer
- Batch pricing — price a whole product line from a spreadsheet
- Unlimited saved machines and materials
- No advertising anywhere on the site
Not open yet
These features are built and working — they are switched on per account by hand while we decide what to charge. Tell us what you need and we will email you when it opens.
Will the free calculators get worse?
No. Nothing that works today moves behind a plan, and a test in the codebase fails the build if a paid check is ever added to a calculator.
Does premium change my prices?
No. Every formula is identical on both plans. A calculator that quietly gave paying users different numbers would be worthless to everyone.
What about my data?
Calculator inputs stay in your browser on either plan. Only things you deliberately save — a machine, a material, a quote — reach the server. Privacy policy.