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Free · Fast · Private

Free online calculators for everyday maths

Free calculators for shopping, bills, loans, savings and dates. No sign-up, and everything runs privately in your browser.

  • 100% free
  • No sign-up
  • Works on any phone
  • Private – nothing is stored

All calculators

Why use these calculators?

Each tool is built for one everyday question and gives a clear answer in a second. Every calculator page also explains the formula with a worked example, so you can understand and check the result yourself.

Private by design

The numbers you type never leave your device. There are no accounts and nothing to install, and the pages work on phones, tablets and computers.

Estimates, not advice

Results are for general information. For important financial, tax or legal decisions, check with a qualified professional.