Base Metabolism Calculator

Metric uses kilograms and centimetres; US uses pounds with feet and inches; UK uses stones and pounds.
Body weight: kilograms (metric), pounds (US) or whole stones (UK).
Only used with UK stones-and-pounds: the pounds part, e.g. 11 st 4 lb is weight 11 and extra pounds 4.
Used when the unit system is metric.
Used when the unit system is US or UK.
The inches part of a feet-and-inches height.
These equations were fitted on adults; they are not valid for children.
Mifflin-St Jeor is the equation the Academy of Nutrition and Dietetics recommends for healthy adults. The lean-mass equations need a body-fat percentage.
Only used by the Katch-McArdle and Cunningham equations, which are driven by lean body mass.
Basal metabolic rate
1,717.5 kcal/day
BMR & TDEE Calculator
Resting metabolic rate (REE)
1,717.5 kcal/day
Total daily energy expenditure
2,662.1 kcal/day
Activity multiplier
1.550
Basal metabolic rate
7,186 kJ/day
Total daily energy expenditure
11,138 kJ/day
Basal rate per kilogram
21.47 kcal/kg/day
Equation used
Mifflin-St Jeor (1990)
Worked out from Mifflin MD, St Jeor ST, Hill LA, Scott BJ, Daugherty SA, Koh YO - A new predictive equation for resting energy expenditure in healthy individuals and 5 other sources.
BMR and RMR are different measurements; the predictive equations here were fitted to measured resting metabolic rate, so the same figure is reported for both.
The activity multipliers (1.2 to 1.9) are a long-standing convention rather than a measured constant for any individual. Track weight for two or three weeks and adjust.
Predictive equations estimate a population average and are typically within about 10 per cent of measured resting metabolic rate for most adults, with larger errors at the extremes of body size and in illness. They are not a substitute for indirect calorimetry and should not be used to manage a medical condition without clinical advice.

How this is worked out

4 steps
  1. Mifflin-St Jeor (1990): BMR = 10 x 80 + 6.25 x 170 - 5 x 30 + 5
  2. BMR = 1717.5 kcal/day
  3. Activity: Moderately active - exercise 3-5 days a week, multiplier 1.55
  4. TDEE = 1717.5 x 1.55 = 2662.1 kcal/day
Daily calories at each activity leveltable
levelmultipliercalories
Sedentary - little or no exercise1.22,061
Lightly active - exercise 1-3 days a week1.3752,362
Moderately active - exercise 3-5 days a week1.552,662
Very active - hard exercise 6-7 days a week1.7252,963
Extra active - physical job or twice-daily training1.93,263

Results are general information, not financial, tax, legal, medical or engineering advice.