Contact Us
Spotted a formula that looks wrong, have an idea for a calculator, or just want to say hello? We read every message.
The quickest way to reach us is by email at hello@healthycalculatorhub.com.
Before you write
If you're reporting a calculation issue, please tell us which calculator, the numbers you entered, and the result you expected — it helps us reproduce and fix things quickly. For general health questions, remember that our tools provide estimates for education only and can't replace advice from a qualified professional.
Common questions
How fast do you reply?
We aim to answer every message within 1–2 business days. Reports of a wrong calculation get priority: they're checked against our published sources and, when confirmed, fixed on the live site — usually within a day.
Can you give me personal medical or nutrition advice?
No. Our calculators and guides are educational references checked against CDC, NHS and NIH guidance (see our editorial process), but we're not a medical practice and can't advise on your individual situation. For personal decisions about weight, diet, training, sleep or pregnancy, please talk to a qualified clinician or registered dietitian.
How do I report an error in a calculator?
Email us or use the form above with three things: the calculator's name, the exact inputs you entered (with units), and the result you expected with a source if you have one. Every calculator page lists the formulas and primary sources it uses under its Sources section, so you can compare directly.