BMR calculator
Your basal metabolic rate with Mifflin-St Jeor, Harris-Benedict and Katch-McArdle, in pounds and inches or metric.
- ๐บ๐ธ US federal & state rules
- See sources
BMR (Mifflin-St Jeor)
1,712 calories a day
About 71 calories an hour at complete rest
- Harris-Benedict (revised)
- 1,776 calories
- Weight
- 170 lb (77.1 kg)
- Height
- 5 ft 10 in (177.8 cm)
This is an example. Enter your numbers above and press the button to see your own result.
Daily calories by activity level (BMR ร multiplier)
| Sedentary (desk job, little exercise), ร 1.2 | 2,055 calories |
|---|---|
| Light (exercise 1 to 3 days a week), ร 1.375 | 2,354 calories |
| Moderate (exercise 3 to 5 days a week), ร 1.55 | 2,654 calories |
| Very active (hard exercise 6 to 7 days a week), ร 1.725 | 2,954 calories |
| Extra active (physical job or training twice a day), ร 1.9 | 3,253 calories |
- BMR is what your body burns lying still for a day. Your total daily burn is higher; use the activity table or the TDEE calculator.
- Formulas predict the average for people like you. Individual results commonly differ by 10% or more.
- This is an estimate for general information, not medical advice. Talk to a doctor or registered dietitian before a big change in diet or exercise, especially if you are pregnant or have a health condition.
Show the math
| Weight in kg | 77.11 |
|---|---|
| Height in cm | 177.8 |
| Mifflin-St Jeor | 10 ร 77.1 + 6.25 ร 177.8 - 5 ร 35 + 5 = 1,712 |
What to do next
How it works
Mifflin-St Jeor uses weight in kilograms, height in centimeters and age: 10 ร weight + 6.25 ร height - 5 ร age, plus 5 for men or minus 161 for women. The calculator converts pounds and inches first.
The revised Harris-Benedict equation (Roza and Shizgal, 1984) is shown for comparison. If you enter body fat, Katch-McArdle uses lean mass only: 370 + 21.6 ร lean mass in kg.
Things to keep in mind
These formulas were built from groups of healthy adults. Your own number can be 10% higher or lower, and it can shift with illness, medication, pregnancy or big changes in muscle mass.
The activity multipliers in the table (1.2 to 1.9) are the ones most calculators use. They are a convention, not a measured value for you. This page is general information, not medical advice.
Sources
- Mifflin MD et al. A new predictive equation for resting energy expenditure in healthy individuals. Am J Clin Nutr 1990;51(2):241-7Checked 2026-10-19
- Roza AM, Shizgal HM. The Harris Benedict equation reevaluated. Am J Clin Nutr 1984;40(1):168-82Checked 2026-10-19
- Cunningham JJ. Body composition as a determinant of energy expenditure. Am J Clin Nutr 1991;54(6):963-9Checked 2026-10-19
Frequently asked questions
What is BMR?
Basal metabolic rate is the energy your body uses at complete rest to keep you alive: breathing, circulation, organs. For most adults it is 1,200 to 2,000 calories a day.
Which BMR formula is most accurate?
Mifflin-St Jeor is the usual default because it came closest to measured values in later comparisons. Katch-McArdle can be better for lean, muscular people if you know your body fat.
What is the BMR of a 35-year-old man who is 5 ft 10 in and 170 lb?
Mifflin-St Jeor gives about 1,712 calories a day. With moderate exercise (ร 1.55) that is about 2,654 calories a day.
Should I eat less than my BMR to lose weight?
Most people do not need to. Diet plans usually cut from total daily burn (TDEE), not from BMR. Very low calorie diets should be supervised by a doctor.