The best way to reach Plain Calculators is by email:
We aim to reply within a few business days. There’s no phone line and no mailing list — just a person reading email.
What to include
- Found an error? Tell us which calculator and the numbers you entered, and we’ll check the math.
- Feature request? Describe the calculator you’d like to see and how you’d use it.
- Privacy question? Have a look at our Privacy Policy first; if it doesn’t answer your question, write to us.
Before you write
A quick reminder from our Disclaimer: these tools are for general information only and are not professional financial, medical, or legal advice.