Contact DoubtCalc

Questions, corrections, or an idea for a calculator we should build? We read every message. The best way to reach us is by email.

What to reach out about

Found a bug or a wrong result? Tell us which calculator and what you entered, and we will look into it. Accuracy is the whole point of this site, so we take these reports seriously.

Want a calculator that does not exist yet? We add new tools based on what people actually need. If there is a calculation you keep doing by hand, let us know and we may build it.

Have a correction or a better source? If a figure looks out of date or you have a more authoritative source, send it over. We update our numbers and cite where they come from.

Press or advertising? For media questions or advertising inquiries, reach us at the same address and we will route it to the right place.

Response time

DoubtCalc is run by a small team, so we are not a 24/7 support desk. We aim to reply within a few business days. Corrections and bug reports go to the front of the line, because a wrong number helps no one.

A note on accuracy

Every calculator here is built to get the math right, and we explain the formula behind each one so you can check our work. The tools provide estimates for information and education, not professional financial, medical, or legal advice. For decisions that carry real consequences, confirm the numbers with a qualified professional. If something looks off, the fastest way to get it fixed is to email us.