Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Health, Fitness & Wellness
BMR Calculator (Mifflin–St Jeor) by Age and Sex
Men: 10×kg + 6.25×cm − 5×age + 5; women subtract 161.
Estimate basal metabolic rate (calories at rest) with Mifflin–St Jeor. Estimates only—not a diagnosis or prescription.
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Inputs
01
1590
80350
4884
Smart analysis
Recommendations
Tailored to your live inputs and result—guidance only, not professional advice.
- Interpret
Treat this as a planning estimate
Primary result: BMR = 1,783 kcal/day. Re-run with optimistic and pessimistic inputs to understand the range—not just a single point.
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Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Sex (0=F, 1=M)
The “Sex (0=F, 1=M)” value used in this tool’s formula. Adjust it to see results update live.
Age (years)
Length of the repayment schedule.
Weight (lbs)
The “Weight (lbs)” value used in this tool’s formula. Adjust it to see results update live.
Height (in)
The “Height (in)” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Estimate basal metabolic rate (calories at rest) with Mifflin–St Jeor. Estimates only—not a diagnosis or prescription. Men: 10×kg + 6.25×cm − 5×age + 5; women subtract 161. Example: 30-year-old 180 lb, 5'10" male → BMR ≈ 1,780 kcal/day.
Men: 10×kg + 6.25×cm − 5×age + 5; women subtract 161.
Example: 30-year-old 180 lb, 5'10" male → BMR ≈ 1,780 kcal/day.
When to use this BMR
Common use cases
- Estimate basal metabolic rate (calories at rest) with Mifflin–St Jeor.
- Sanity-check with this case: 30-year-old 180 lb, 5'10" male → BMR ≈ 1,780 kcal/day.
- The relationship is: Men: 10×kg + 6.25×cm − 5×age + 5; women subtract 161.
Localized examples
- Health, Fitness & Wellness: the example on this page uses the same formula as the widget.
What you get
- Fields: Sex (0=F, 1=M), Age (years), Weight (lbs), Height (in)
- Men: 10×kg + 6.25×cm − 5×age + 5; women subtract 161.
- Example on the page: 30-year-old 180 lb, 5'10" male → BMR ≈ 1,780 kcal/day.
How to Calculate BMR Step-by-Step
- 1Enter Sex (0=F, 1=M), Age (years), Weight (lbs), then the remaining fields. Use the values you have, not a catalog average, unless that is all you know.
- 2Men: 10×kg + 6.25×cm − 5×age + 5; women subtract 161.
- 3Worked case: 30-year-old 180 lb, 5'10" male → BMR ≈ 1,780 kcal/day.
- 4If this number would change a drug, a diet, or a return-to-play call, take it to a clinician. The page never examined you.
Governing formula
Men: 10×kg + 6.25×cm − 5×age + 5; women subtract 161.
30-year-old 180 lb, 5'10" male → BMR ≈ 1,780 kcal/day.
Example: set Sex (0=F, 1=M) = 1, Age (years) = 30, Weight (lbs) = 180, then read the result.
Variable definitions
- sex
Sex (0=F, 1=M)
The “Sex (0=F, 1=M)” field. Default 1; typical range 0–1.
- ageYears
Age (years)
The “Age (years)” field. Default 30; typical range 15–90.
- weightLbs
Weight (lbs)
The “Weight (lbs)” field. Default 180; typical range 80–350.
- heightIn
Height (in)
The “Height (in)” field. Default 70; typical range 48–84.
- The formula (Men: 10×kg + 6.25×cm − 5×age + 5; women subtract 161.) does not see labs, medications, sleep, or injury history. A clinician does.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Men: 10×kg + 6.25×cm − 5×age + 5; women subtract 161.
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Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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