How many calories did that 30-minute run actually burn? This calculator uses MET (Metabolic Equivalent of Task) values - the standard metric used in exercise physiology - to estimate calorie burn for over 25 activities, scaled to your weight.
30 min of Running
291 kcal
Per hour
581 kcal
8.3 MET intensity
Per minute
9.7 kcal
Equivalent food burned
Roti (~70 kcal): 4.2 · Apple (~80 kcal): 3.6 · Idli (~50 kcal): 5.8 · Vada pav (~290 kcal): 1.0
MET-based estimates are population averages, accurate to within 10-15%. Actual burn varies with fitness level, terrain, efficiency and pace within an activity category.
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How many calories did that workout actually burn? It's one of the most-asked fitness questions and one of the most common areas of over-estimation. Fitness watches and gym machines often inflate calorie burn by 20-40% because their algorithms incorporate optimistic assumptions about your effort and physiology. This calculator uses the academic gold-standard MET (Metabolic Equivalent of Task) values from the Compendium of Physical Activities, scaled to your specific body weight, for the most reliable estimate available without lab measurement.
Understanding actual calorie burn matters because exercise is rarely as 'expensive' as people think. A 30-minute jog at moderate pace might burn 300 kcal for a 70 kg adult - roughly the calories in a single samosa, half a slice of pizza, or 1.5 chapatis with ghee. Knowing real numbers helps you align exercise expectations with nutritional reality. Trying to out-train a bad diet is the most common reason exercise programs don't produce weight loss; understanding calorie math fixes that.
Enter your weight in kg.
Pick the activity from the list - running, cycling, yoga, gym, sports and more.
Enter how many minutes you spent.
See the calories burned for that session.
Calories burned = MET × weight (kg) × hours. MET is a standardised intensity value where 1 MET = your resting energy expenditure. Walking at 5 km/h is ~3 METs, running at 10 km/h is ~10 METs. Heavier people burn more for the same activity at the same intensity.
Calories = MET × Weight (kg) × Time (hours)
MET (Metabolic Equivalent of Task) is a unit defined as the oxygen consumption (and therefore calorie burn) of a person sitting quietly at rest. 1 MET ≈ 3.5 ml O₂/kg/min ≈ 1 kcal/kg/hour. Activities are assigned MET values based on extensive metabolic chamber studies: walking 5 km/h ≈ 3 METs, jogging 8 km/h ≈ 8 METs, running 10 km/h ≈ 10 METs, sprinting ≈ 12-16 METs, weightlifting (moderate) ≈ 4-6 METs, cycling (moderate) ≈ 6-8 METs, yoga ≈ 3 METs, HIIT ≈ 8-10 METs.
Calories burned = MET × Weight (kg) × Time (hours). For a 70 kg adult running at 8 km/h for 45 minutes: 8 × 70 × 0.75 = 420 kcal. Weight matters significantly - a 90 kg adult doing the same workout burns 540 kcal (29% more); a 55 kg adult burns 330 kcal (21% less). This is why heavier people tend to lose weight faster initially with the same exercise routine.
The MET-based estimate includes your resting metabolic rate, not just the 'extra' calories from exercise. For a 70 kg adult, 1 MET-hour ≈ 70 kcal - meaning 30 minutes of any activity at 1 MET burns 35 kcal (your baseline anyway). For comparing exercise to food intake, the 'gross' figure (which the calculator reports) is appropriate; you'd have burned some calories during that time regardless.
MET ≈ 8. Calories burned = 8 × 70 × 0.75 = 420 kcal. Equivalent: about 1 large samosa, 1 medium slice of pizza, or 8-10 almonds. Solid but not life-changing - exercise is a slow-burn tool for sustainable fat loss, not a fast fix for caloric overconsumption.
MET ≈ 5. Calories burned = 5 × 80 × 1 = 400 kcal. Strength training burns fewer calories per minute than cardio, but builds muscle and raises resting metabolism. Total benefit is much larger than the in-session burn suggests.
They're population averages, accurate to within 10-15% for most people. Individual factors (efficiency, fitness level, pace within an activity category) can create larger errors.
Strictly yes - MET-based estimates include your resting metabolic rate. For 'extra' calories burned during a workout, subtract BMR-equivalent: MET × weight × hours − weight × hours (since 1 MET ≈ resting). Most apps don't bother.
Watches use heart rate plus accelerometer data. They tend to over-estimate, especially for non-running activities. MET-based estimates are conservative.
A lot. A 90 kg person burns 50% more calories than a 60 kg person doing the same exercise. That's why heavier people lose weight quickly when they start exercising.
Partially. If you're in a deliberate deficit, eat back ~50% of exercise calories - over-estimation is common, and a small surplus would stall progress.
Running >12 km/h (12 METs), HIIT and stair climbing (8-10 METs), vigorous cycling (10+ METs), swimming laps (8+ METs). Walking and yoga are 2-4 METs - low intensity.
Body composition, daily energy needs and pregnancy timelines all rest on formulas validated across millions of people, but no single number tells the whole story. The values from this calculator are point estimates with a known margin of error - body fat from skinfold or US Navy method has roughly a ±3% standard error compared to a DEXA scan, and BMR can vary ±10% person to person at the same height and weight. Use these numbers to track trends week over week, not to chase decimal precision day to day.
Pair this tool with the BMR, TDEE, calorie and macro calculators to turn a single measurement into an actionable plan. None of these tools are a substitute for a qualified doctor, registered dietitian or certified strength coach - but they remove the busywork so you spend more time on training and recovery, less on math.
The Calories Burned Calculator is part of the Health & Fitness suite on Online Calculator Tools, alongside 6 related calculators. All tools share the same UI patterns, the same privacy-first rendering (nothing is sent to a server), and the same commitment to showing the formula and assumptions behind every result.
