Calories Burned Calculator
Select your activity, enter your weight and duration, and get an evidence-based calorie burn estimate using MET values from the Compendium of Physical Activities. Includes fat grams equivalent and calories per minute.
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Enter your values above to see the results.
Tips & Notes
- ✓MET-based estimates carry ±15–20% error for individuals. Use them to compare activities and track relative effort over time rather than as precise calorie counts for dietary decisions.
- ✓A heavier person burns significantly more calories per session. As you lose weight through exercise and diet, calorie burn per session decreases — increase duration or intensity to maintain the same deficit.
- ✓HIIT produces an EPOC (excess post-exercise oxygen consumption) afterburn effect that adds roughly 6–15% to total calorie burn over the following 12–24 hours — a real but modest advantage over steady-state cardio.
- ✓Strength training MET values (3.5–6.0) appear modest, but resistance training builds lean mass that increases resting metabolic rate — the long-term calorie burn advantage is through higher BMR, not session calorie count.
- ✓Fitness trackers on your wrist overestimate calorie burn by 20–50% for most activities. Do not eat back all tracker-estimated exercise calories without accounting for this systematic bias.
Common Mistakes
- ✗Eating back the full calorie burn shown by a fitness tracker or gym machine — these consistently overestimate by 25–50%, which eliminates most of the calorie deficit from exercise.
- ✗Expecting exercise alone to drive significant weight loss without dietary changes — a 45-minute run burns ~400–500 kcal, equivalent to one modest meal, which is easily offset by eating slightly more after exercise.
- ✗Using MET values for "weightlifting" broadly without distinguishing intensity — circuit training at high intensity has MET ~8.0; light free weight work is ~3.5. The activity label matters.
- ✗Not accounting for the decline in calorie burn as fitness improves — a trained runner at 8 km/h burns 5–10% fewer calories per km than a beginner at the same pace due to improved mechanical efficiency.
- ✗Comparing calorie burn across different types of exercise (e.g., running vs weightlifting) without considering afterburn — resistance training session calorie burn appears lower but has metabolic benefits not captured by MET alone.
Calories Burned Calculator Overview
Calorie burn during exercise is determined by three factors: how metabolically demanding the activity is (MET), how much mass you are moving (body weight), and how long you do it. The MET formula captures all three in a single calculation.
MET-based calorie burn formula:
Calories Burned = MET × body weight (kg) × duration (hours) MET (Metabolic Equivalent of Task) = ratio of exercise energy expenditure to resting energy expenditure. MET 1.0 = sitting at rest. MET 8.0 = 8 times the energy cost of sitting. Net calories burned = Gross calories − (BMR/24 × exercise hours)
EX: Person weighs 78 kg, runs at moderate pace (MET 9.8) for 40 minutes (0.667 hours) Gross calories = 9.8 × 78 × 0.667 = 509 kcal BMR ~1,750 kcal/day → resting burn during 40 min = 1,750 ÷ 24 × 0.667 = 48.6 kcal Net calories burned = 509 − 49 = 460 kcal Fat equivalent: 460 ÷ 9 = 51 g of fat (theoretical — actual fat burn depends on intensity)
Effect of body weight on calorie burn:
Effect of body weight on calorie burn (same activity, same duration): Person A: 60 kg — Calories = MET × 60 × time Person B: 90 kg — Calories = MET × 90 × time 90 kg person burns 50% more calories than 60 kg person in the same session. This is why heavier individuals lose weight faster initially from the same exercise program.
EX: Cycling at moderate pace (MET 6.8) for 60 minutes: 60 kg person: 6.8 × 60 × 1.0 = 408 kcal 75 kg person: 6.8 × 75 × 1.0 = 510 kcal 90 kg person: 6.8 × 90 × 1.0 = 612 kcal As fitness improves and body weight drops, calorie burn per session decreases — progress requires adjusting duration or intensity.
MET values for common activities:
| Activity | MET value | 60 kg person/hour | 80 kg person/hour |
|---|---|---|---|
| Walking 5 km/h | 3.5 | 210 kcal | 280 kcal |
| Cycling (leisure) | 4.0 | 240 kcal | 320 kcal |
| Swimming (moderate) | 6.0 | 360 kcal | 480 kcal |
| Running 8 km/h | 8.3 | 498 kcal | 664 kcal |
| Running 12 km/h | 11.5 | 690 kcal | 920 kcal |
| HIIT (vigorous) | 12.0 | 720 kcal | 960 kcal |
| Weightlifting (moderate) | 3.5 | 210 kcal | 280 kcal |
| Yoga (hatha) | 2.5 | 150 kcal | 200 kcal |
| Rowing (vigorous) | 8.5 | 510 kcal | 680 kcal |
| Jump rope (fast) | 12.3 | 738 kcal | 984 kcal |
Calorie tracking method accuracy comparison:
| Device/method | Typical error vs metabolic cart | Best activity |
|---|---|---|
| MET formula (this calculator) | ±15–20% | All activities equally |
| Apple Watch / Fitbit (wrist) | ±20–40% | Running (better); cycling (worse) |
| Garmin chest strap + HR | ±10–15% | Steady-state cardio |
| Gym machine display | ±25–50% | Unreliable for most machines |
| Metabolic cart (indirect calorimetry) | ±2–5% | Reference standard — lab only |
Consumer fitness trackers consistently overestimate calorie burn, particularly for cycling, swimming, and strength training — often by 30–50%. Treadmills and ellipticals display inflated numbers that assume a "standard" body weight and do not account for individual metabolic efficiency. For weight management, treating tracker estimates as exact causes people to eat back more calories than they actually burned. A practical approach: use calorie burn estimates directionally (comparing activities, tracking relative effort) rather than as precision inputs for dietary decisions.
Frequently Asked Questions
For a person weighing 70 kg running at a moderate pace of 8 km/h (MET 8.3), 30 minutes burns approximately 8.3 × 70 × 0.5 = 290 gross calories. At 80 kg, the same run burns about 332 calories. At 60 kg, approximately 249 calories. Running faster increases the MET value — at 12 km/h (MET 11.5), the same 70 kg person burns about 402 calories in 30 minutes. These are gross calories; net calories (what you actually burned beyond resting) are approximately 10–15% lower.
For the same distance, the calorie difference between walking and running is smaller than most people expect. Running a kilometre burns roughly 80–100 kcal for an average person; walking the same kilometre burns roughly 60–80 kcal — a difference of about 20–30%. The larger difference is in time: running covers distance in about half the time, so per unit of time, running burns roughly twice as many calories. If your goal is calorie burn per session, running wins decisively. If your goal is calorie burn per kilometre, the advantage of running is smaller, particularly at lower body weights.
Gym machines (treadmills, ellipticals, stationary bikes) typically overestimate calorie burn by 25–50% because they assume a standardized body weight (often 68 kg or 150 lbs) and do not account for individual metabolic efficiency. A 2017 Stanford study found Apple Watch and Fitbit overestimated calorie burn by an average of 27% and 40% respectively across different activities. Heart rate-based estimates from chest straps are more accurate for steady-state cardio (±10–15%) but still unreliable for strength training and HIIT. The MET method used here has similar accuracy to heart rate methods for most activities.
EPOC (Excess Post-exercise Oxygen Consumption) is the elevated calorie burn that occurs after exercise as the body returns to baseline — replenishing oxygen stores, clearing lactate, restoring heart rate and body temperature. High-intensity exercise produces more EPOC than moderate-intensity. Research suggests EPOC typically adds 6–15% to total session calorie burn — so a workout burning 400 kcal might produce an additional 25–60 kcal of EPOC. While real, EPOC is often overstated in fitness marketing. The primary metabolic benefit of high-intensity training is not EPOC but improved cardiorespiratory fitness and, for resistance training, increased lean mass and resting metabolic rate.
A moderate weightlifting session (MET ~3.5–5.0) burns roughly 200–300 kcal per hour for an average-sized person — significantly less than running (500–700 kcal/hour) in the same timeframe. However, this comparison is incomplete. Resistance training builds lean muscle mass, and each kilogram of muscle increases resting metabolic rate by approximately 13–17 kcal/day. Someone who gains 5 kg of muscle over a year increases their resting burn by 65–85 kcal/day permanently — roughly equivalent to a 10-minute run every single day without doing it. The long-term metabolic math often favors a combination of cardio and resistance training over cardio alone.
Technically yes, but practically difficult. A typical 45-minute moderate run burns 350–500 kcal — equivalent to one medium meal or two large snacks. Research consistently shows that exercise without dietary control produces modest weight loss because appetite tends to increase with exercise volume, partially or fully offsetting the calorie deficit. A 2019 meta-analysis found that exercise-only interventions produced about one-third the weight loss of combined diet-plus-exercise interventions over the same period. Exercise is enormously valuable for health, cardiovascular fitness, and weight maintenance, but dietary control is the more powerful lever for creating the sustained calorie deficit needed for significant fat loss.