BMR Calculator
Estimate basal metabolic rate and maintenance calories from body measurements.
Inputs
Results update as you edit.
BMR
1,727 kcal/day
Results update as the calculator inputs change.
This calculator is informational and is not medical advice.
Maintenance estimate
2,375 kcal/day
Katch-McArdle estimate
1,736 kcal/day
Lean mass
63.2 kg
How to Calculate BMR
How to Interpret BMR
BMR is not the same as total daily calories. It estimates baseline energy use, then activity and movement are added to estimate maintenance needs.
What Factors Affect BMR?
BMR and Calorie Planning
BMR Estimate
Estimate resting energy needs from body measurements.
TDEE Estimate
Multiply BMR by activity level to estimate maintenance calories.
Progress Check
Adjust calories based on measured weight trends over time.
Frequently Asked Questions
What is BMR?
BMR is an estimate of calories used at rest for basic body functions.
Is BMR the same as maintenance calories?
No. Maintenance calories include BMR plus daily movement, exercise, and digestion.
Which formula is most accurate?
No formula is perfect. Mifflin-St Jeor is commonly used, and body-fat-based formulas can help when body composition is known.
Can I eat below BMR?
Some plans do, but aggressive restriction can be risky. Get professional guidance for significant dietary changes.
Why did my calories change after losing weight?
A smaller body generally uses fewer calories, and activity levels may change too.