BMR Calculator
Find your Basal Metabolic Rate — the calories your body burns at rest — using the Mifflin–St Jeor formula. Use it as a floor before planning TDEE, macros or a calorie deficit.
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BMR vs TDEE
Your Basal Metabolic Rate is the number of calories your body would burn lying still all day — about 60–70% of total daily energy use for most people. The rest comes from movement, exercise and the energy cost of digesting food.
BMR (male) = 10·kg + 6.25·cm − 5·age + 5
BMR (female) = 10·kg + 6.25·cm − 5·age − 161
To get a daily calorie target, use the TDEE Calculator which multiplies BMR by an activity factor. Then break those calories into protein, carbs and fat with the Macro Calculator.
Frequently asked questions
What is BMR?+
BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest to keep basic functions running — breathing, circulation, cell production and body temperature.
BMR vs TDEE — what's the difference?+
BMR is calories burned at rest. TDEE (Total Daily Energy Expenditure) is BMR multiplied by an activity factor that accounts for movement, exercise and digestion. TDEE is what you eat to maintain weight; BMR is the floor.
Which BMR formula does Caloritix use?+
Mifflin–St Jeor — the most accurate BMR equation for healthy adults in published comparisons, with typical error margins of about 10%.
Should I eat at my BMR to lose weight?+
No. Eating at BMR is far below what most people burn in a day and is not sustainable. Use the TDEE calculator to find maintenance calories, then apply a moderate deficit with the Calorie Deficit calculator.
Health disclaimer: Caloritix provides estimate-based health and fitness calculators for general educational purposes only. Results are not medical advice and should not replace guidance from a qualified healthcare professional.