Health & fitness
Calorie needs
Estimate daily energy needs from a basal-energy estimate and activity factor.
Calculators / Health & fitness / Basal metabolic rate
Basal metabolic rate calculator
Estimate basal energy expenditure using the Mifflin–St Jeor equations.
On this page
Estimated BMR1,623.75kcal/day
Calculator controls
How to calculate
Estimate basal energy expenditure using the Mifflin–St Jeor equations.
Estimated BMR = 10*weight+6.25*height-5*age
Worked example
Example inputs
Weight (KG): 70 · Height (cm): 175 · Age (years): 35 · Equation: Male constant (+5)
Example resultEstimated BMR: 1623.75 kcal/day
Assumptions and limits
The displayed base omits the sex constant in the formula engine; select the appropriate equation and adjust by +5 for male or −161 for female. This is an estimate, not a metabolic test.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Estimate basal energy expenditure using the Mifflin–St Jeor equations. The displayed figures use the inputs and formula shown on this page.
When this tool is useful
Use the basal metabolic rate to compare a scenario, check an estimate, or verify a manual calculation.
Understanding your inputs
| Input | What to enter |
|---|---|
| Weight (kg) | Enter a number of at least 0.1 and no more than 500. |
| Height (cm) | Enter a number of at least 30 and no more than 300. |
| Age (years) | Enter a number of at least 18 and no more than 120. |
| Equation | Enter one of the available options. |
Frequently asked questions
What should I check before using the basal metabolic rate result?
The displayed base omits the sex constant in the formula engine; select the appropriate equation and adjust by +5 for male or −161 for female. This is an estimate, not a metabolic test.
Is this basal metabolic rate result exact?
It is exact for the stated mathematical model and entered values. Real-world results can differ when rates, timing, fees, definitions or measurement conditions differ.