Free BMR Calculator Online

What Is a BMR Calculator?

A BMR calculator estimates basal metabolic rate, which is the number of calories your body may use at rest. It uses age, gender, height, weight, activity level, and formula choice to estimate BMR, TDEE, maintenance calories, goal calories, BMI, ideal weight range, and simple macro targets.

This free online basal metabolic rate calculator is useful for calorie planning, fitness estimates, nutrition planning, maintenance calorie estimates, and understanding daily energy needs. Results are general estimates only.

How BMR Works

BMR estimates the energy your body uses for basic functions at rest. TDEE goes one step further by adding activity. Because activity and body composition vary, BMR should be treated as a helpful starting estimate, not an exact number.

BMR Calculator Formula

The calculator can also use the revised Harris-Benedict formula. After calculating BMR, it applies an activity multiplier to estimate TDEE and then adjusts calories based on the selected goal.

BMR vs TDEE

BMR estimates resting calorie use. TDEE estimates total daily calorie use after activity. For meal planning, TDEE is often more useful because it reflects movement and exercise more than BMR alone.

BMR Calculator Examples

Benefits of Using a BMR Calculator

Healthy BMR Planning Tips

• Use BMR and TDEE as estimates, then adjust based on real progress.
• Choose an activity level that reflects your usual week.
• Avoid extreme restriction and focus on balanced meals and activity.
• For personal health concerns, ask a qualified professional.

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Frequently Asked Questions