BMR Calculator

Estimate daily basal metabolic rate from sex, age, height, and weight.

Note: This is a health reference estimate. Actual energy use can vary by muscle mass, illness, medication, and activity pattern.

Category: Life Tools

When to use?

Use it as a starting point for diet planning, weight management, or daily calorie budgeting.

How to use

  • Enter sex, age, height, and weight.
  • Check daily BMR in kcal.
  • Use it as a base for activity-adjusted calories.

Input Explanation

Enter accurate adult body information for a better estimate.

Calculation Basis

Uses the Mifflin-St Jeor formula: men 10w + 6.25h - 5a + 5; women 10w + 6.25h - 5a - 161.

Usage Examples

  • Diet planning base - Estimate minimum daily energy needs.
  • Compare body inputs - See how height, weight, age, and sex affect BMR.
  • Connect to TDEE - Use BMR with activity level for maintenance calories.

Examples

  • Male, 30, 175 cm, 70 kg → about 1,649 kcal
  • Female, 30, 160 cm, 55 kg → about 1,239 kcal

Cautions

  • This is an estimate for everyday planning. Actual results can vary by environment, product specifications, personal condition, and local rules.

Guides

What BMR means

Basal metabolic rate estimates the energy your body uses at rest for basic life functions.

Connecting to calorie planning

Multiply BMR by an activity factor to estimate maintenance calories, then adjust intake according to your goal.

FAQ

Which formula is used?

The Mifflin-St Jeor formula.

Is BMR the same as daily calories?

No, BMR excludes activity. Multiply by activity level for TDEE.

Why do men and women differ?

The formula uses different constants by sex.

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