Do you store the numbers I enter?

The short answer

No. The numbers you enter are used only to work out your answer and are not stored. You do not need an account or a sign-up to use any calculator.

There are no ads on the site, and we do not sell your details.

How your numbers are used

• Some calculators run entirely in your browser.
• Others send the values to our server in a single request, purely to compute the result, which is returned to you.
• We do not keep or read those values afterwards.

Which method a calculator uses depends on the calculator. Either way, your values are used only to work out your answer.

What we do measure

We collect anonymous usage statistics through Google Analytics to understand how the site is used.

• Pages visited.
• Device type.
• Approximate location, at country or city level.

The mobile app uses Google Analytics for Firebase. We do not sell these details or use them for advertising.

Where your numbers can still end up

Your browser may remember the values you last entered, and your favourites are kept in this browser only. If you press Share, the link contains your values, so anyone you send it to will see them.