Calories Burned Calculator (Track Weight Loss)

This calorie-burn calculator covers five common activity types in one tool — walking, running, cycling, swimming, and strength training — so you don’t need a separate calculator for every workout you do. Pick your activity, enter your body weight and how long you were active, and it converts that into an estimated calorie burn using the same MET-based formula exercise physiologists rely on for these figures.

Below the calculator you’ll find the exact MET formula with a worked example, how to pick the right activity setting, how a single session’s burn fits into a broader weight-loss calorie deficit, a MET reference table across common activities, common mistakes people make when estimating calories burned, and an expanded FAQ.

The MET Formula and a Worked Example

Calories burned = MET × 3.5 × body weight (kg) ÷ 200 × duration in minutes. MET stands for Metabolic Equivalent of Task, a standardized way of expressing how many times more energy an activity requires compared with sitting quietly at rest, which is defined as 1.0 MET. These reference values for hundreds of everyday and exercise activities are published in the Compendium of Physical Activities, a widely used reference in exercise science.

Worked example: a 70 kg person running for 30 minutes, using the running MET value of 8.0. Calories = 8 × 3.5 × 70 ÷ 200 × 30 = 294 kcal. Swap the activity to walking (MET 3.5) for the same 70 kg, 30-minute session and the estimate drops to about 129 kcal, which illustrates just how much intensity alone changes the total even when body weight and duration stay exactly the same.

Choosing the Right Activity and MET Value

Each activity option in this calculator uses a representative, moderate-effort MET value for that category, but real-world intensity within any single activity still varies a lot. A “run” at an easy conversational jog and a hard interval session are both technically running, yet they burn meaningfully different amounts of energy per minute — the MET value here reflects a typical moderate pace rather than either extreme.

If your actual pace is noticeably faster or slower than a typical moderate effort for that activity, treat the result as a reasonable ballpark rather than an exact figure. For activities with a wide effort range — cycling and swimming especially — checking a dedicated calculator with more granular intensity options (where available) will usually get you a tighter estimate than a single general-purpose MET value.

How This Feeds Into a Weight-Loss Calorie Deficit

Weight loss ultimately comes down to sustaining a calorie deficit — burning more energy than you consume — over time, and exercise is one lever alongside diet for creating that deficit. The widely cited rule of thumb is that roughly 3,500 kcal of accumulated deficit corresponds to about one pound of fat, so this calculator also shows how many sessions like the one you just calculated it would take to work through that benchmark on exercise alone.

In practice, most sustainable weight-loss plans combine a modest, consistent exercise habit with a modest reduction in food intake, rather than trying to create the entire deficit through exercise alone. Relying only on exercise typically means either very long sessions or very high intensity, which is harder to sustain consistently than pairing moderate activity with a modest, appropriate reduction in daily calorie intake.

Why the Same Duration Can Burn Very Different Amounts

Body weight is a direct multiplier in the MET formula, which is why two people doing the identical workout for the identical duration will still get different calorie estimates — a heavier body requires more energy to move through the same activity. This is a genuine physiological effect, not a quirk of the formula, since moving more mass through space simply costs more energy regardless of the specific activity involved.

This also means the calorie estimate from this calculator will shift over time as your body weight changes, which is worth re-checking periodically rather than assuming a single calculation from months ago still applies exactly today, especially if your weight has moved meaningfully in either direction.

MET Reference Table for Common Activities

These are the exact MET values this calculator uses for each activity option:

Using This Calculator Alongside a Fitness Tracker

Wearable fitness trackers estimate calorie burn using a mix of heart rate, motion sensors, and proprietary algorithms, which can produce a different number than a straightforward MET-based formula like this one. Neither approach is perfectly precise for an individual — both are estimates built on population-level data — so if the two disagree by a modest amount, that’s expected rather than a sign either tool is broken.

What matters more for tracking progress toward a weight-loss goal is consistency: using the same estimation method session after session gives you a comparable trend line over time, even if the absolute number isn’t perfectly accurate for your exact physiology. Treat any single-session calorie figure as directional rather than exact.

Common Mistakes When Estimating Calories Burned

A common mistake is picking an activity’s MET value based on the wrong intensity — treating a leisurely walk as if it were brisk walking, for example, or an easy recovery swim as if it were a hard interval session. Because MET values scale the whole result directly, an intensity mismatch produces a proportionally wrong calorie estimate.

Another mistake is forgetting that this figure is the calorie cost of the activity itself, on top of (not instead of) the calories your body burns simply staying alive at rest — your basal metabolic rate. When comparing a workout’s contribution to a daily calorie deficit, remember that resting energy expenditure continues in the background the whole time regardless of exercise.

FAQ

Why does the same activity show different results for different people?
Body weight is a direct multiplier in the MET formula, so heavier individuals burn more calories doing the identical activity for the identical duration than lighter individuals do.

Is running always going to burn more than walking?
At a typical moderate pace for each, yes — running carries a substantially higher MET value than walking, though a very fast, purposeful walk can still burn more than a very slow jog in some cases.

Does this account for my resting metabolism too?
No — this figure is the additional calorie cost of the activity itself, separate from the calories your body burns at rest simply to function, which continue in the background regardless of exercise.

Why is strength training’s MET value lower than running’s?
General strength training involves more rest between sets and less continuous, sustained cardiovascular effort than running, which keeps its average MET value more moderate despite the real muscular effort involved.

Can I use this for activities not listed, like hiking or sports?
This calculator covers five common general activities; Blogyz has dedicated calculators for several other specific activities with their own tailored MET options and fields.

How accurate is a MET-based estimate for one individual?
MET values are population averages derived from studies of many people, so any single individual’s true energy expenditure can reasonably vary somewhat from the formula’s estimate, even when inputs are entered correctly.

Does age or sex change the calorie estimate?
This standard MET formula doesn’t factor in age or sex directly; some other calorie formulas do include those variables, which is one reason different tools can produce somewhat different results for the same activity.

How many calories should I aim to burn per workout for weight loss?
There’s no single universal target — what matters most is sustaining a consistent weekly deficit over time through some mix of activity and diet, tailored to your own goals and schedule.

Should I eat back the calories I burn exercising?
This depends entirely on your specific weight-loss plan and calorie targets; many plans intentionally build in some exercise-driven deficit rather than fully replacing burned calories through additional food.

Is swimming really the same MET value as cycling here?
At the moderate-effort levels this general calculator represents, yes, though both activities have a wide range of possible intensities that could shift the true value meaningfully higher or lower in practice.

Related posts:

MET Minutes Calculator Running Calorie Calculator Calories Burned Biking Calculator Steps to Calories Calculator Walking Calorie Calculator