Calories Burned Calculator
How many calories did that workout burn? Three inputs, an answer in three seconds.
This value may be unrealistic — double-check your duration and weight.
Estimated calories burned
≈ kcal
That's roughly the same as…
Same time, other workouts
Estimates use the MET formula (2011 Compendium of Physical Activities). Actual burn varies with fitness, terrain and effort.
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What is a MET?
A MET (Metabolic Equivalent of Task) is the ratio of your energy use during an activity to your energy use at rest. Sitting quietly is 1 MET; an activity rated at 8 METs burns about eight times as much energy per minute. This calories burned calculator multiplies the activity's MET value by your body weight and time using the standard formula kcal = MET × 3.5 × weight(kg) ÷ 200 × minutes, so the answer scales with both how hard and how long you exercised.
Why does this differ from my smartwatch or running app?
A MET calculator uses population-average values for each activity, while a smartwatch adds your real-time heart rate, GPS pace and personal profile. Neither is exact — wearables typically run 10-30% off in validation studies. Treat this exercise calorie calculator as a quick, ad-free estimate for planning, not a lab measurement, and expect some gap from any device.
Why do calories differ by intensity for the same activity?
Because effort is what burns energy. Running at 10 km/h has a higher MET than a brisk walk, so it burns more per minute even though both are "on your feet." That is why this tool lists activities by intensity (slow vs brisk walking, moderate vs vigorous cycling): picking the option that matches your actual pace gives a far more accurate calories burned estimate.
How many calories equal 1 kg or 1 lb of body fat?
Roughly 7,700 kcal per kilogram of fat, or about 3,500 kcal per pound. So the ~300 kcal a typical workout burns is a fraction of a kilogram — sustainable fat loss comes from a steady daily deficit, not a single session. Use the food equivalents in this exercise calorie calculator to see how one workout compares to what you eat.
Is my weight sent to a server?
No. Every calculation in this calories burned calculator runs inside your browser, and your weight, activity and duration never leave your device. Your last entry is saved only to your browser's localStorage for convenience on your next visit, and you can clear it anytime by clearing site data.