BMR (Basal Metabolic Rate) Calculator
Calculate daily calorie baseline burn at complete rest (Mifflin-St Jeor).
Last reviewed by the myCalculator Editorial Team
Input Parameters
Calculation Results
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Formula & How BMR (Basal Metabolic Rate) Calculator Works
Basal metabolic rate is the energy your body uses at complete rest. This calculator uses the Mifflin-St Jeor equation: for men BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5, and for women the final term is −161. A 35-year-old man who weighs 80 kg and is 180 cm tall has BMR = 800 + 1,125 − 175 + 5 = 1,755 kcal per day. This is the energy needed just to stay alive, not what you actually burn: multiply by an activity factor to get total daily energy expenditure. The equation is an estimate and can be off by 10% or more for individuals, especially athletes and older adults.
- Enter Biological Sex: Input your target parameter value.
- Enter Age (Years): Input your target parameter value.
- Enter Height (cm): Input your target parameter value.
- Enter Weight (kg): Input your target parameter value.
- Apply Formula: Calculate using
BMR (Men) = 10W + 6.25H - 5A + 5 | BMR (Women) = 10W + 6.25H - 5A - 161. - Review Results: View exact computed answers, metrics, and worked mathematical proofs.
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Frequently Asked Questions (FAQs)
How is BMR different from TDEE?
BMR is calories burned at total rest, while TDEE includes daily movement and exercise.
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Authoritative Standards & Verified Reference Citations
Calculations and mathematical logic on this page are grounded in published statutory rules, regulatory standards, and official government data published by the following bodies:
Australia's Physical Activity and Sedentary Behaviour Guidelines and dietary energy expenditure metrics.
Nutrient Reference Values (NRVs) for Australia and New Zealand, macronutrient distribution, and hydration standards.
Dedicated Australian home loans, borrowing capacity, mortgage repayments & refinance modeling.