Mifflin-St Jeor Calculator
Named Mifflin–St Jeor resting-calorie sketch — same adult equation as the BMR calculator, called out by name. Click any i for detail.
Body stats
Sex
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Sex
Used in the Mifflin–St Jeor constants. |
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Age (years)
i
Age
Adult equation — not for young children. |
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Weight (lb)
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Weight
Current body weight in pounds. |
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Height (in)
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Height
Height in inches (5′6″ = 66). |
How to use this calculator
- Select sex and enter age, weight, and height.
- Read kcal/day at rest.
- Pair with TDEE when you want activity multipliers.
- See also the BMR calculator for the same equation under the shorter name.
Results explained
Mifflin–St Jeor estimates basal metabolic rate for adults: 10×kg + 6.25×cm − 5×age + 5 (male) or −161 (female). It is the same equation behind Calcscape’s BMR page; this page exists for searchers who look up the equation by name. Muscle mass, hormones, and illness still move the true number.
Quick reference: Mifflin–St Jeor
Metric form, then shown as kcal/day.
| Item | Detail |
|---|---|
| Male | 10·kg + 6.25·cm − 5·age + 5 |
| Female | 10·kg + 6.25·cm − 5·age − 161 |
| Related page | BMR calculator (same math) |
| Not included | Exercise / NEAT — use TDEE |
Educational estimate — not a metabolic cart or medical diagnosis.
How the estimate is built
BMR = 10·kg + 6.25·cm − 5·age + (5 if male else −161).
Example scenario
Female, 30y, 150 lb, 66 in → about 1,400 kcal/day (rounded).
FAQ
Is this different from the BMR calculator?
No — same Mifflin–St Jeor equation. This page highlights the equation name for people searching that term.
Harris–Benedict?
Older equations exist; Mifflin is more commonly recommended for healthy adults today.
Athletes with high muscle?
Equations can under- or over-shoot; treat as a starting point.
Metric inputs?
Enter lb and inches; the page converts internally.