Terms of use
The short version: our calculators are free estimates to help you plan. Check anything important before you rely on it.
Estimates, not advice
Results are estimates based on typical figures and the information you enter. They are not financial, tax, legal, medical, veterinary or professional building advice. Your real costs and quantities may differ.
Check before you buy or decide
Before buying materials, booking work or making a money, health or pet care decision, check with your supplier, a tradesperson, an accountant, a doctor or a vet, as fits.
Accuracy
We work hard to keep figures correct and up to date, as set out in our editorial policy. We can't promise every figure is right for your situation at every moment. If you spot a mistake, please email hello@numwise.co.uk.
Links to other sites
We link to official sources and other websites so you can check our figures. We aren't responsible for their content.
Using our calculators on your site
You may embed our calculators using the code we provide, as long as the link back to Numwise stays in place. Please don't copy our pages or data in bulk.
Changes to these terms
We may update these terms. Last updated 20 October 2026.