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BMR Calculator

Estimate the calories your body burns at rest each day and see how activity changes total maintenance needs.

Sex

Height

Estimated BMR
1,783
calories per day at rest
Weekly at Rest
12,479
Monthly at Rest
54,266
Estimated maintenance calories by activity level
Sedentary2,139 cal
Light2,451 cal
Moderate2,763 cal
Active3,075 cal
Very Active3,387 cal
Last updated: March 2026Reviewed by CalculWise editorial team
Methodology: Mifflin-St Jeor equation for basal metabolic rate, with maintenance estimates created by applying standard activity multipliers.
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What BMR tells you

Basal Metabolic Rate is the energy your body uses in a true resting state. It does not include walking, training, or most daily activity. Think of it as the minimum calorie burn required to keep the body running.

That makes BMR a foundation number, not a complete nutrition plan. It is useful because it anchors maintenance estimates and helps explain why calorie needs differ across body size, age, and sex.

Why this matters for planning

  • BMR helps you understand your baseline energy needs.
  • It becomes the starting point for TDEE and maintenance calories.
  • It helps avoid setting diet targets unrealistically low.
  • It adds context before choosing a fat-loss or muscle-gain goal.

Frequently Asked Questions

What is BMR?

BMR stands for Basal Metabolic Rate. It is the number of calories your body needs each day at complete rest to support basic life functions such as breathing, circulation, and temperature regulation.

Is BMR the same as TDEE?

No. BMR is your baseline calorie burn at rest. TDEE includes activity, exercise, and daily movement on top of BMR, so it is usually much higher than BMR.

Which formula does this BMR calculator use?

This page uses the Mifflin-St Jeor equation, one of the most widely used and practical formulas for estimating resting calorie needs in adults.

Why does age, sex, height, and weight affect BMR?

Those inputs influence the amount of metabolically active tissue your body supports and the energy needed to maintain it. Larger bodies and younger adults usually have higher resting energy needs than smaller or older adults.