Contact Mathulate

Report a mistake

Calculators can be wrong, and corrections are welcome. To help us check quickly, include:

• the address of the calculator page, or its name;
• the values you entered and the units you chose;
• the answer the page gave you;
• the answer you expected, and the source or working behind it if you have one.

Confirmed errors are fixed in the calculator, its worked example and its tests together. The methodology page explains how a fix ships.

Advertising

Mathulate is funded by advertising. For advertising or sponsorship enquiries, write to the address above with Advertising in the subject line and a short description of what you have in mind.

General questions

Questions about a calculator, a suggestion for a new one, a privacy question or a problem with the site are all welcome at the same address. For privacy questions, the privacy page explains what the site stores and what it does not.

What we cannot do