Contact Us
Have a question or suggestion? We'd love to hear from you.
Response Time
We typically respond within 24–48 hours on business days.
Office Hours
Monday to Friday, 9:00 AM – 6:00 PM (GMT). Messages sent outside these hours are answered the next business day.
Priority Support
Bug reports and urgent issues are prioritised and typically addressed within 24 hours.
Frequently Asked Questions
Is BMI Health Checker really free?
Yes, all of our calculators — including the BMI Calculator, Body Fat Calculator, Calorie Calculator, and Ideal Weight Calculator — are completely free to use with no hidden charges or premium tiers. Creating an account to save your results is also free.
How accurate are the calculators?
Our calculators use established, peer-reviewed medical formulas such as the WHO BMI classification, the U.S. Navy body fat method, and the Mifflin-St Jeor equation for calorie estimation. While they provide reliable screening estimates, they are not a replacement for clinical testing. For more details, see our guide on how to get the most accurate measurements.
Can I use these tools if I'm pregnant or under 18?
Standard BMI categories are designed for non-pregnant adults aged 18 and over. Pregnancy and growth during adolescence significantly affect body composition, so results may not be meaningful for these groups. Consult a pediatrician or obstetrician for age- or pregnancy-specific assessments.
How is my health data stored?
If you use our calculators without an account, no data is stored on our servers. If you create an account, your saved results are encrypted and accessible only to you. We never sell personal data to third parties. Read our full privacy policy for details.
I found a bug or have a feature idea. How should I report it?
Use the contact form below and select "Bug Report" or "Feature Request" from the category dropdown. Please include as much detail as possible — the browser you were using, the steps to reproduce the issue, and any screenshots. This helps us investigate and fix problems faster.
Do you offer partnership or advertising opportunities?
We are open to collaborations with health and wellness brands that align with our mission. Select "Partnership" in the category dropdown and tell us about your organization and proposal. We review all partnership inquiries and respond within one week.
Before reaching out, you might find your answer in our resource pages: learn how our tools work on the How to Use Our Calculators page, understand what your numbers mean on the Understanding Your Results page, or read about our approach on the About page.