Contact

If you’ve spotted a mistake, have a question about a calculator, or want to suggest a new one, I’d like to hear from you. I read every message myself.

What to write to me about?

• Corrections. If a result, formula, fee, or benchmark looks wrong, tell me which page it’s on and what you expected to see. I’ll check it and fix it if you’re right.
• Calculator requests. Tell me what you’re trying to work out, and I’ll consider building it.
• Anything else. Feedback, questions, partnerships or press are all welcome.

Email: howcalculate@gmail.com

I usually reply within 2-3 business days.

Contact form

What happens to your message?

I use your name and email only to reply to you. I don’t add anyone to a mailing list or share their details. You can read more in the Privacy Policy.