Calorie Calculator for Men (BMR & TDEE)
Estimate resting energy and daily expenditure for men aged 19–78. Calculator entries stay in this page; separate site analytics may use browser storage.
Estimated resting energy (REE, often called BMR)
–kcal / day
Estimated daily expenditure (TDEE)
–kcal / day
Activity factor: –. Both outputs are rounded to the nearest 10 kcal/day after calculation.
Enter complete measurements to calculate. These estimates are not a personal calorie prescription.
For generally healthy adult men aged 19 to 78. If you have a medical condition, unexplained weight change or a history of disordered eating, ask a clinician or registered dietitian rather than using this tool to set an intake target.
MethodMale REE = 10 × weight in kg + 6.25 × height in cm − 5 × age in years + 5. TDEE = unrounded REE × the selected activity factor. The 1990 Mifflin et al. study developed the resting-energy equation, not these activity factors.
How to use the estimates
Replace the example values with your weight, height and completed years of age. Choose kg or lb and cm or feet/inches; switching units converts the same measurement. In feet/inches, enter both fields, including an explicit 0 inches when appropriate. Feet must be a nonnegative whole number; inches must be at least 0 and less than 12.
The tool accepts 30–300 kg and 120–230 cm, including fractional measurements, or their converted equivalents. These are software input limits, not healthy ranges or proof that the equation is valid at every size. Converted values retain the original measurement internally. Weight conversions display up to two decimal places and height conversions up to four; these are approximate displays, not new limits. Editing a converted value uses your new entry and the exact metric limits. At a boundary, enter kg or cm rather than a rounded conversion.
What the calculation includes
The original sample included 498 healthy adults, 251 men and 247 women, aged 19 to 78. This tool uses the male equation and keeps that age range; belonging to it does not guarantee an accurate individual result. For the derivation and limits, see our Mifflin-St Jeor equation guide.
The conventional activity factors are 1.2, 1.375, 1.55 and 1.725. They are estimates added to the resting equation, not coefficients validated by the 1990 paper. At the example settings of 85 kg, 178 cm, age 40 and factor 1.375, unrounded REE is 1,767.5 kcal/day and TDEE is 2,430.3125 kcal/day. The display rounds these separately to 1,770 and 2,430.
How much confidence to place in the result
Frankenfield and colleagues’ 2005 systematic review compared resting-metabolic-rate equations in healthy nonobese and obese adults. Mifflin-St Jeor was within 10% of measured resting expenditure in more individuals than the other equations reviewed, but noteworthy individual errors remained. Older adults and US-residing ethnic minorities were underrepresented. That finding is not a 10% error bound for your TDEE.
For muscle gain, Helms and colleagues’ 2023 surplus study randomized 21 resistance-trained lifters; 17 completed eight weeks of training three days a week. Faster body-mass gain was associated with greater skinfold increases. This small, short study does not establish a personal surplus or apply automatically to beginners and other populations.
Calculator privacy
The calculator code does not send or persist your entries. Separate website analytics may collect usage data and use browser storage; see the site privacy policy. This is not a promise that the entire page is free of tracking.
Frequently asked questions
How accurate is a calorie calculator?
Individual resting-energy errors can exceed 10%; the activity estimate adds uncertainty. The displayed rounding is not a guarantee of accuracy. Neither output measures your metabolism.
What is the difference between BMR and TDEE?
This tool estimates resting energy expenditure (REE), often called BMR by calculators. TDEE multiplies the unrounded REE by an activity factor to estimate total daily expenditure. Do not read the resting value as a daily intake target.
Can this calculator set a fat-loss or muscle-gain target?
No. It estimates resting and daily expenditure, not a suitable deficit or surplus for you. Body composition, training and health affect how useful an estimate is; a larger calorie surplus does not guarantee more muscle.
Does this calculator store my measurements?
The calculator code processes measurements in this browser page and does not send or persist them. This applies to the calculator, not the whole website: separate site analytics may collect usage data and use browser storage.