Military TDEE & Macros
Calorie and macronutrient targets for service members — Mifflin-St. Jeor BMR with activity factors that map to garrison, BCT, field, and deployment realities. Protein targets aligned to ISSN guidance for active populations.
Daily macronutrient breakdown
Track for 2 weeks at the target. Weigh in once a week, same conditions, same time. Adjust by ±10% if weight is moving faster or slower than the goal predicts. Protein is the non-negotiable; cluster carbs around training. For a cut, see Body Comp Cut, Safely for the full protocol.
BMR uses the Mifflin-St. Jeor equation (Mifflin et al., 1990) — generally considered the most accurate predictive BMR formula for healthy adults. Activity factors are standard ACSM ranges, mapped to military contexts. Goal deltas (−750/−500/0/+250/+500 kcal) reflect commonly used clinical and sports-nutrition ranges (Helms et al., The Muscle and Strength Pyramid: Nutrition; Aragon 2017 ISSN diet position stand). Protein targets follow the ISSN position stand on protein and exercise (Jäger et al., 2017) — 1.6 g/kg for maintenance / lean bulk, 2.0 g/kg for cuts to preserve lean mass under deficit. Fat at 0.8 g/kg supports hormone production per multiple ISSN/ACSM consensus statements. Carbohydrates are the remainder after protein and fat. This is a starting point — track for 2 weeks and adjust based on observed weight change.
For cuts:Pair this with Body Comp Cut, Safely for the full peak-week protocols and the harm-reduction discussion of dangerous shortcuts.
Frequently Asked Questions
What is TDEE?
TDEE stands for Total Daily Energy Expenditure — the total number of calories your body burns in a day, including everything from basic organ function to PT and daily movement. It is your estimated maintenance level: eat at your TDEE and, on average, your weight holds steady. Eat below it and you lose weight; eat above it and you gain.
How is TDEE calculated?
This tool estimates your Basal Metabolic Rate (BMR) — the calories you would burn at complete rest — using the Mifflin-St. Jeor equation, which is generally considered the most accurate predictive BMR formula for healthy adults. It then multiplies BMR by an activity factor (1.2 for sedentary up to 1.9 for extremely active) to get your TDEE. The bigger your training load, the higher the multiplier.
How do I use TDEE to cut or bulk?
Start from your TDEE — that is maintenance. To cut (lose fat), eat below it so your body draws on stored energy; the calculator applies a moderate deficit of about 500 kcal for roughly a pound a week, or a larger deficit when you need to make weight faster. To bulk (add muscle), eat in a surplus above TDEE. Larger deficits come off faster but are harder to sustain, and any surplus brings some fat gain — pick the goal that matches your timeline.
What should my macros be?
Macros split your total calories into protein, carbohydrate, and fat. Protein and carbs carry about 4 calories per gram; fat carries about 9. This calculator sets protein and fat from your bodyweight following ISSN guidance — protein higher during a cut to protect lean mass, fat to support hormone production — and fills the remaining calories with carbohydrate to fuel training. Your exact grams depend on your weight and goal, so read them off the tool rather than copying someone else’s numbers.
How accurate is a TDEE estimate?
It is a well-calibrated starting point, not a measurement. Predictive formulas work from population averages, so your real numbers can vary with genetics, body composition, sleep, stress, NEAT (non-exercise movement), and how hard you actually train. Treat the target as a hypothesis: eat at it for about two weeks, weigh in under the same conditions, and adjust by roughly 10% based on what the scale actually does.