BMR Calculator
Estimate your Basal Metabolic Rate (BMR) using the Mifflin–St Jeor formula. Informational only, not medical advice.
Informational only. Estimates vary by body composition, sleep, hormones, and health conditions.
Privacy: calculations run locally in your browser. No inputs are stored or sent to a server.
How it works
This calculator uses the Mifflin–St Jeor equation (metric units). If you enter imperial values, they are converted to cm and kg first.
Male: BMR = 10×kg + 6.25×cm − 5×age + 5
Female: BMR = 10×kg + 6.25×cm − 5×age − 161
Examples
- Male, 30y, 175 cm, 70 kg → BMR ≈ 1,649 kcal/day
- Female, 30y, 165 cm, 60 kg → BMR ≈ 1,320 kcal/day
- Imperial example: 5 ft 9 in, 154 lb → converts to metric then computes
FAQ
- What is BMR?
BMR (Basal Metabolic Rate) estimates how many calories your body burns per day at rest to support basic functions.
- Is this the same as TDEE?
No. TDEE includes activity. BMR is a baseline at rest.
- Which formula does this use?
It uses the Mifflin–St Jeor equation with metric inputs (kg, cm), converting from imperial if needed.
- Is the result exact?
No. It is an estimate. Real metabolism varies with body composition, sleep, hormones, and health conditions.
- Is my data stored?
No. All calculations run locally in your browser.