How it is calculated
BMR is the energy your body uses at complete rest. This calculator uses the Mifflin-St Jeor equation with weight in kg, height in cm and age in years:
- Male: 10 × weight + 6.25 × height − 5 × age + 5
- Female: 10 × weight + 6.25 × height − 5 × age − 161
Estimate only, not medical advice.
Worked example
Male, 30 years, 70 kg, 175 cm:
- 10 × 70 = 700
- 6.25 × 175 = 1,093.75
- 5 × 30 = 150
- 700 + 1,093.75 − 150 + 5 = 1,648.75, shown as 1,649 kcal per day
Female, 30 years, 60 kg, 165 cm: 600 + 1,031.25 − 150 − 161 = 1,320.25 kcal per day.
Why your number may differ
The equation is an estimate, so your actual BMR can differ. It also covers energy at rest only, not daily activity. Estimate only, not medical advice.