Exercise Calories Burned Calculator
Estimate calories burned during exercise from MET intensity, body weight, and duration, with a 5% upward adjustment for excess post-exercise oxygen consumption (EPOC). Use it to track exercise contribution to daily calorie deficit during weight loss.
Last updated: May 2026
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About this calculator
The formula is: calories burned = intensity × weight × (duration / 60) × 1.05. The base term (intensity × weight × duration/60) computes calories from MET values (where 1 MET = 1 kcal/kg/hour); the 1.05 multiplier adds 5% for EPOC (excess post-exercise oxygen consumption), the "afterburn" effect where metabolism remains elevated for hours after exercise. The 5% EPOC adjustment is conservative — real EPOC varies by exercise type (HIIT and resistance training produce higher EPOC, 6-15%; steady-state cardio produces lower, 1-5%). MET values for common activities: brisk walking 4-5; light cycling 4-6; running 8 min/mile 12; running 6 min/mile 16; swimming moderate 7-8; weightlifting 5-6; HIIT 8-12. Edge cases: zero weight, intensity, or duration produces zero calories. The formula gives population averages; individual variation is ±15-30% based on fitness level (trained athletes burn fewer calories at same external intensity), body composition, age, sex, and movement efficiency. For weight-loss specifically, exercise calorie burn is generally less important than diet for creating deficits; running for an hour burns ~500-700 calories, while skipping one large meal saves 700-1000 calories. The most effective weight-loss exercise is resistance training (preserves muscle during deficit, supports long-term metabolism), not just cardio. Cardio is useful for cardiovascular health and additional calorie burn; combined approach (3-4x resistance + 2-3x cardio per week) produces best body composition outcomes during weight loss.
How to use
Example 1 — Moderate cardio. 80 kg person bikes at moderate intensity (MET 7) for 50 minutes. Enter 80 for Weight, 7 for Intensity, 50 for Duration. Result: 7 × 80 × (50/60) × 1.05 = 7 × 80 × 0.833 × 1.05 = 489.7 calories. ✓ Solid contribution to a daily calorie deficit. Combined with a 500-calorie dietary deficit, total deficit ~990 calories supports ~1 kg/week loss. Example 2 — HIIT session. 65 kg person does intense HIIT (MET 10) for 30 minutes. Enter 65, 10, 30. Result: 10 × 65 × (30/60) × 1.05 = 10 × 65 × 0.5 × 1.05 = 341.25 calories. ✓ A 30-minute HIIT session burns about 340 calories during the workout plus EPOC. For weight loss, HIIT is time-efficient — same calorie burn as 50+ minutes of moderate cardio. Combine with strength training and adequate protein for best body composition results.
Frequently asked questions
How accurate is the 1.05 EPOC multiplier?
A conservative estimate that works for most steady-state exercise. EPOC (excess post-exercise oxygen consumption) is the elevated metabolic rate for hours after exercise ends. Magnitude varies by exercise type: low-intensity steady-state cardio (walking, easy jogging) produces 1-3% EPOC; moderate-intensity (brisk running, moderate cycling) 3-6%; HIIT and CrossFit-style workouts 6-12%; heavy resistance training 6-15%. The calculator's flat 1.05 (5%) underestimates EPOC for high-intensity work and overestimates for very low-intensity. For better accuracy: use 1.02-1.03 for easy walking; 1.05 for moderate cardio; 1.08-1.12 for HIIT or intense resistance training. EPOC matters most for weight loss because it adds free calorie burn beyond what the session itself does. For practical weight management, total daily activity (NEAT + exercise) over weeks matters far more than EPOC precision per session.
Does exercise really matter for weight loss?
Less than diet, but yes for multiple reasons. Pure calorie math: creating a 500 cal/day deficit via diet alone (eat 500 less) vs via exercise alone (burn 500 more) produces equivalent weight loss. In practice, exercise adds 200-500 calories on most days while diet changes can add 500-1000 calorie deficits; diet has more leverage. Beyond pure calorie burn, exercise matters because: preserves muscle during deficit (especially resistance training); supports cardiovascular health independent of weight; improves insulin sensitivity; supports mental health through stress reduction; helps with weight maintenance after reaching goal weight (people who exercise regularly maintain weight better than those who don't). For weight loss, the right combination is moderate dietary deficit (500-750 cal/day below TDEE) plus resistance training (preserves muscle) plus moderate cardio (additional calorie burn + cardiovascular benefits). Exercise alone, without dietary changes, typically produces slow or no weight loss because hunger increases roughly proportional to calories burned.
What's the best exercise for fat loss?
A combination, not a single type. Resistance training (3-4 sessions/week) is the most important — preserves muscle during deficit, supports metabolic rate, improves body composition, prevents muscle loss that compromises long-term weight maintenance. Moderate cardio (2-3 sessions/week, 30-60 minutes per session) adds substantial calorie burn, supports cardiovascular health, and improves insulin sensitivity. HIIT (1-2 sessions/week) is time-efficient for calorie burn and produces strong EPOC; less suitable as the only modality due to high recovery demands. Walking (daily, 7,000-10,000 steps) provides NEAT (non-exercise activity thermogenesis) calories that quietly add up; often as important as structured exercise for total energy expenditure. The "best" exercise is one you can sustain consistently. People who hate running but love swimming should swim; people who can't commit to 60-minute sessions but can do 20 should do 20. Consistency over years matters more than perfection on any single session.
What are the most common exercise/weight-loss mistakes?
The biggest is overestimating exercise calorie burn and "eating it back," eliminating the deficit. The second is treating exercise as license for poor diet ("I worked out, I can eat this"); typically the workout burns 300-500 calories while the rationalized indulgence adds 500-1000. The third is doing only cardio and losing muscle alongside fat — producing the "skinny fat" outcome. The fourth is starting too aggressively (90-minute sessions 6 days/week) without sustainable habits, leading to burnout and reversion. The fifth is using cardio to compensate for lack of dietary discipline; diet has more leverage and is more sustainable. The sixth is ignoring resistance training out of fear of "bulking up" (a myth — muscle gain is slow even for dedicated trainees, and resistance training during deficit primarily preserves existing muscle). The seventh is comparing your exercise progress to social media transformations done with surgery, drugs, or genetic outliers. For sustainable fat loss, aim for 80-150 minutes of total exercise per week combined with modest dietary deficit and high protein intake.
When should I not use this calculator?
Skip it for clinical exercise prescription (cardiac rehabilitation, post-surgery, severe obesity); medical supervision is needed and clinical guidelines differ from general fitness calculations. It is the wrong tool for measuring elite athletic energy expenditure; sport-specific testing (VO2 max, metabolic cart) gives more accurate individual data. Do not use it for precise daily calorie budgeting; tracker and formula errors compound (±15-30% per session, plus self-reported food intake error of 20-40%), producing apparent calorie deficits that are actually breakeven. For very low-intensity activity (light walking, casual cycling), MET-based formulas overestimate; use lower MET values or accept inaccuracy. For very high-intensity intervals where MET values are imprecise; heart rate-based monitoring gives better individual estimates. And for weight management decisions involving real action (medication, surgery, intensive medical intervention), work with a healthcare provider rather than relying on calculator estimates.