Calories Burned Calculator
Estimate calories burned during an activity based on its MET value, your body weight and the duration.
- Running373 kcal
- Just Sitting (same time)38 kcal
About 335 kcal of that came specifically from being active rather than sitting still for the same 30 minutes.
About the Calories Burned Calculator
This estimates how many calories a given activity burns using MET values — a standard research measure of how many times harder an activity works your body compared to sitting still. Pick an activity, enter your weight and how long you did it, and it multiplies out an estimate for that session.
MET-based estimates are averages drawn from studies of typical adults doing an activity at a typical pace — your actual burn shifts with intensity, terrain, fitness level, and body composition, so treat the number as a reasonable ballpark rather than something a metabolic cart measured directly.
It's a fast way to put a number on a workout — for logging in a food/exercise tracker, deciding how much to eat back after a hard session, or just satisfying curiosity about whether that hike burned more than the run you skipped instead.
Your weight and workout details are calculated locally in the browser and aren't stored or sent anywhere, so there's no account or log tying your activity history to you.
How it’s calculated
Calories per minute come from the formula MET × 3.5 × weight(kg) ÷ 200, a standard conversion that turns a MET value into an actual energy-expenditure rate for your specific body weight.
The 'just sitting' comparison uses a MET of 1.0 (resting metabolic baseline) over the same duration, so you can see how much of the total burn is actually attributable to the activity itself versus calories you'd have burned anyway just existing.
Frequently asked questions
What is a MET value?
MET stands for metabolic equivalent of task — it's a multiple of your resting energy expenditure, so a MET of 7 means an activity burns roughly 7 times what sitting quietly would over the same time.
How accurate are calories-burned estimates from MET values?
They're population averages, not individualized measurements — actual burn varies with your fitness level, effort, and body composition, so treat the number as a reasonable estimate rather than an exact figure.
Does more body weight mean more calories burned for the same activity?
Yes — the formula scales directly with weight, since moving a heavier body through the same activity takes more energy, which is why the calculator asks for your weight before estimating a total.
Why does the calculator show what I'd burn 'just sitting' for comparison?
Because total calories burned during a workout includes calories you'd have burned anyway at rest — subtracting that baseline shows the calories genuinely attributable to the activity itself.
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