Contact us

Found a mistake, have an idea for a new calculator, or need help with a result? We would like to hear from you.

Email: shani.waheed@gmail.com

Reporting a calculator error

To help us check it quickly, please include:

• The calculator's page address
• The numbers you entered and the units you selected
• The result you got and the result you expected, with a source if you have one

We read every message and correct confirmed errors as fast as we can.