Free online bmr calculator
BMR Calculator
Basal metabolic rate calculator using the Mifflin–St Jeor equation for men and women.
- Free · No signup
- Instant results
- Private in your browser
- Works on mobile
Result
Estimate basal metabolic rate from age, sex, height, and weight.
About this bmr calculator
Find how many calories your body burns at rest from age, sex, height, and weight — the foundation for TDEE and calorie planning.
Use this free online bmr calculator when you need a quick, clear estimate without creating an account. Calculations run in your browser on Toolwright, so your inputs stay private. Results are for education and planning — confirm important financial, tax, or health decisions with a qualified professional.
How to use the BMR Calculator
- Enter the values asked for in the form — amounts, rates, dates, or measurements depending on the tool.
- Tap calculate to see your result instantly. Adjust inputs anytime to compare scenarios.
- Review the breakdown and FAQs below if you want more context on what the numbers mean.
Why people use Toolwright
- Clear answers — dedicated page for the bmr calculator, built to load fast and stay easy to read.
- Fast & free — no paywall, no email gate, results above the noise.
- US-ready — copy and units aimed at American and Western users.
- One toolkit — jump to related fitness & health tools without leaving the site.
BMR Calculator FAQ
What formula do you use?
Mifflin–St Jeor, a widely used clinical estimate for resting calorie needs in adults.
Is this medical advice?
No. These calculators provide estimates only. For diagnosis or treatment decisions, consult a qualified clinician.