Formula and method
The calculator uses the common MET equation: calories ≈ MET × 3.5 × body weight in kg ÷ 200 × minutes. Body weight in pounds is converted to kilograms first. The final number is rounded into a range because lifting includes rest, setup, tempo changes, and exercise choices that a simple equation cannot see.
For conservative planning, this page uses 3 MET for light technique work, 3.5 MET for traditional lifting, 5 MET for dense hypertrophy work, and 6 MET for short-rest circuit-style lifting. These choices are broad estimates, not personalized nutrition advice.
Estimation background: the Compendium of Physical Activities explains MET-based estimates, and the CDC adult activity guidance separates aerobic and muscle-strengthening goals.
Worked example
A 185 lb lifter is about 84 kg. A 45-minute traditional lifting session at 3.5 MET gives: 3.5 × 3.5 × 84 ÷ 200 × 45 ≈ 231 calories. The calculator rounds that to about 200–270 calories so the result is useful without pretending to know every rest period and set density.
Example scenarios to compare
- 150 lb, 30 minutes, traditional lifting: about 110–140 calories.
- 200 lb, 60 minutes, dense hypertrophy work: about 400–550 calories.
- 90 kg, 45 minutes, light technique work: about 180–240 calories.
Assumptions and limitations
A MET estimate works best as a broad planning tool. It does not know your exact rest periods, bar speed, training age, heart-rate response, body composition, exercise selection, or whether a machine changes the actual work done. Wearables may disagree because they use different sensors and equations.
Use the estimate to compare sessions, not to earn food or punish yourself after eating. If you are dieting, managing a medical condition, pregnant, recovering from an eating disorder, or taking medications that affect energy balance, use qualified medical or dietitian guidance for nutrition decisions.
Do not chase burn at all costs
Calories are not the only reason to lift. Strength work helps maintain or build muscle, supports body-composition goals, and preserves movement capacity. If calorie burn becomes the only target, lifters often rush rest periods, cut range of motion, and turn technical lifts into sloppy conditioning.
Better progress signals
Track weekly body-weight trend, waist or clothing fit, key lift performance, hunger, sleep, and recovery. Those signals tell you whether the whole plan is working. A single workout calorie estimate should not decide your nutrition for the day.
