Contact

FitCalcs is built and maintained independently by Jesse, and every message is read. Whether you have a question, a correction, or an idea, here is how to reach us.

Email us at hello@fitcalcs.app. We aim to reply within a few business days.

What you can write to us about

• Report an error. If a calculator result looks wrong or a formula seems off, tell us what you entered and what you expected. Accuracy matters to us and we will investigate — see how we vet formulas on our methodology page.
• Suggest a calculator. Missing a tool you would use? Let us know what it should calculate and we will consider adding it.
• Ask about the math. Questions about which formula a calculator uses or where a number comes from are always welcome.
• General feedback. Confusing wording, a layout problem on your device, or anything else — it all helps us improve.

Please note we cannot provide personalized medical, nutrition, or training advice. Our calculators are educational estimates for healthy adults, not a substitute for a doctor or registered dietitian.