ReckonBoxHow the calculator works
A calories burned calculator estimates the energy an activity costs, using its MET value, your bodyweight, and the time you spend. The math is short: calories equal the MET number times your weight in kilograms times the hours you move. A 70 kg person on a brisk 30 minute walk, at a MET of 4.8, burns about 168 calories.
Weight matters because you are hauling it the whole way. Double the load and you roughly double the burn for the same movement, which is why a calculator that ignores your weight is guessing. Time is the other lever. Intensity sets the rate, duration sets the total, and the two multiply.
MET values for common workouts
A MET, or metabolic equivalent of task, is the ratio of an activity's energy cost to sitting quietly, which is defined as 1 MET. Sitting is 1, a brisk walk is near 5, hard running is above 10. Most tools compute from these numbers and then hide them. Here they are in the open, drawn from the 2011 Compendium of Physical Activities.
| Activity | MET | Intensity |
|---|---|---|
| Yoga | 2.3 | Light |
| Weight training, moderate | 3.5 | Moderate |
| Walking, brisk (3.5 mph) | 4.8 | Moderate |
| Cycling, moderate (12 to 14 mph) | 8.0 | Vigorous |
| Swimming laps, moderate | 8.0 | Vigorous |
| Jogging (5 mph) | 8.5 | Vigorous |
| Running (6 mph) | 9.3 | Vigorous |
| Jumping rope | 11.0 | Vigorous |
The intensity label follows a simple split: under 3 METs is light, 3 to 6 is moderate, and 6 or more is vigorous. Public health guidance counts anything moderate or above toward a weekly activity target, so the band next to your result tells you where a session sits.
Does walking or running burn more?
Per minute, running wins by a wide margin. A 6 mph run rates 9.3 METs against a brisk walk's 4.8, so minute for minute it burns close to twice as much. Walking earns its place on total time and joints. Walk for an hour and you can match a 30 minute run, at a fraction of the impact. The calculator's comparison panel makes this concrete: it shows your chosen activity beside a walk, a run, a ride, a swim, and a rope, all at your weight and duration.
How many calories does 10,000 steps burn?
Ten thousand steps burns roughly 350 to 500 calories for most adults, depending on weight and pace. The rule of thumb is about 0.04 to 0.05 calories per step, which works out to somewhere between 2,000 and 3,000 steps per 100 calories. A heavier person walking briskly sits at the top of that range, a lighter person strolling near the bottom. If you track steps rather than minutes, brisk walking at 3.5 mph is the closest row above, and about 120 steps a minute is a typical brisk cadence.
Why the number is only an estimate
MET values are averages measured across groups, so they smooth over the things that make your burn personal: fitness, muscle, technique, wind, hills, and heat. Two people can do the same 30 minutes and differ by 20 percent. The honest use of this tool is relative. It is reliable for comparing a run against a ride, or this week against last, and looser as an exact calorie count. It is an estimate, not medical advice. For a plan built around your health, talk to a doctor or a registered dietitian. For the calories your whole day burns at rest and in motion, use the TDEE calculator.
Frequently asked questions
How are calories burned calculated? Calories burned equals the MET value of the activity times your weight in kilograms times the hours you spend. A MET rates how hard an activity is against sitting still, so a 4.8 MET brisk walk burns 4.8 times your resting rate.
How many calories does 10,000 steps burn? For most people, 10,000 steps burns roughly 350 to 500 calories, depending on weight and pace. A heavier person walking briskly lands near the top of that range, a lighter person strolling near the bottom.
Why do heavier people burn more calories? Weight sits inside the formula, so moving a heavier body over the same distance or time costs more energy. Two people doing the identical workout can differ by a third in calories burned on weight alone.
Does walking or running burn more calories? Running burns more per minute because its MET is far higher: about 9.3 for a 6 mph run against 4.8 for a brisk walk. Walking longer can close the gap, since total burn depends on both intensity and time.
Are these numbers exact? No. MET values are population averages, so your real burn varies with fitness, terrain, and technique. Treat the figure as a close estimate and use it to compare activities rather than as a precise count.