Calories Burned Calculator

How This Is Calculated

This calculator uses MET (Metabolic Equivalent of Task) values, a standard measure of how energy-intensive an activity is compared to resting. The formula is: Calories = MET × weight (kg) × duration (hours). A MET of 1 represents resting energy expenditure, so an activity with a MET of 8 burns roughly 8 times as many calories as sitting still for the same duration. Select an activity and intensity from the list, enter your weight and how long you did it, and the estimate updates instantly.

Comparing Calorie Burn Across Different Activities

Because every activity in the list runs through the same MET × weight × duration formula, the calculator doubles as a quick way to compare relative intensity across activities, holding weight and duration constant. At a 70 kg body weight and 30-minute duration, yoga (MET 2.5) burns roughly 88 calories, moderate walking (MET 3.5) burns about 123, cycling at a moderate pace (MET 7.5) burns about 263, and jump rope (MET 10.0) burns about 350, more than triple the yoga figure for the identical time investment. This kind of side-by-side comparison is useful for choosing a higher-intensity substitute activity when time is limited, swapping a 30-minute walk for a 15-minute jump rope session, for instance, can burn a comparable or greater number of calories in half the time.

Common Mistakes When Estimating Exercise Calories

A frequent mistake is selecting the highest-intensity version of an activity out of aspiration rather than actual effort, which inflates the estimate well beyond what was actually burned. Another common mistake is forgetting to convert duration correctly, since the formula expects hours, not minutes, entering "30" directly into a formula built around hours rather than converting it first would produce a result 60 times too high, though this calculator handles that conversion automatically so it's only a concern for anyone trying to replicate the math by hand. A third mistake is treating MET-based calorie estimates as precise enough to justify eating back the exact amount burned during exercise, when in reality both the estimate itself and typical portion-size accuracy carry enough uncertainty that "roughly accounting for it" is more realistic than treating it as an exact calorie-for-calorie exchange.

Why Weight Matters

Heavier bodies burn more calories doing the same activity, since more energy is required to move more mass, this is why the calculation scales directly with your entered weight rather than using a fixed value per activity.

Worked Example

For a person weighing 70 kg running at a 10-minute-mile pace (MET value 9.8) for 30 minutes, the calculation converts duration to hours first: 30 minutes is 0.5 hours. Multiplying MET × weight × hours gives 9.8 × 70 × 0.5 = 343 calories burned. Switching to a lower-intensity activity, moderate-pace walking (MET 3.5) for the same 30 minutes and 70 kg body weight, gives 3.5 × 70 × 0.5 = 122.5, rounded to 123 calories, less than half of the running figure despite the identical duration and body weight, illustrating how much intensity alone changes the estimate. A 30-minute HIIT session (MET 8.0) at the same weight comes out to 8.0 × 70 × 0.5 = 280 calories, between the walking and running examples, consistent with HIIT's typically high but variable intensity.

What MET Values Actually Represent

MET stands for Metabolic Equivalent of Task, a standardized unit researchers use to compare the energy cost of different physical activities on a common scale. One MET is defined as the energy your body uses at complete rest, roughly 1 kilocalorie per kilogram of body weight per hour, so every other MET value expresses how many multiples of that resting rate a given activity requires. MET values for hundreds of activities have been compiled through decades of exercise physiology research, most notably the Compendium of Physical Activities maintained by researchers and regularly updated, giving a standardized reference that fitness apps, wearable devices, and calculators like this one draw from, generally with minor variation between sources depending on which version of the compendium or which specific study they cite.

Why Calories Burned Estimates Vary Between Devices

It's common to see a fitness tracker, gym cardio machine, and a calculator like this one all report somewhat different calorie burns for what feels like the same workout. Part of the difference comes from which underlying MET or formula source each tool uses, since MET compendium values are themselves averages with a documented range around each figure, not single universally agreed numbers. Wearable devices with heart rate sensors add another layer of estimation, converting heart rate into an estimated intensity level, which introduces its own error sources like sensor accuracy and individual variation in heart rate response to effort. None of these tools measures your actual oxygen consumption directly (the only way to precisely measure calorie burn during exercise), so some disagreement between sources is expected and normal rather than a sign that any particular tool is wrong.

Using Calories Burned Alongside Calorie Intake

This figure is most useful when paired with an understanding of daily calorie needs rather than viewed in isolation. Exercise calories are typically a smaller share of total daily expenditure than people expect, a 30-minute run might burn around 340 calories, while resting metabolism alone accounts for well over a thousand calories across the same day for most adults. This doesn't make exercise calories unimportant, they add up meaningfully over a week and contribute to a calorie deficit or the ability to eat more while maintaining weight, but treating a single workout as license for a much larger calorie splurge is a common miscalculation, since exercise calorie burns are often smaller than the perceived effort would suggest. Pairing this calculator with the Calorie Calculator or TDEE Calculator gives a fuller picture of how a given workout fits into overall daily energy balance.

Choosing the Right Intensity Setting

Several activities in the list appear at two different MET values to reflect different intensity levels, and picking the more accurate one meaningfully changes the result. A useful gut check is the talk test: if you can comfortably hold a full conversation, you're likely at a lower-intensity level; if you can only speak in short phrases, you're likely at the higher intensity option; if you can barely speak at all, you're working at an intensity higher than most of the listed options capture. Matching your selection to actual perceived effort, rather than defaulting to whichever option sounds more impressive, gives a more reliable estimate than picking based on the activity name alone.

Estimating Calorie Burn for Combined or Interval Workouts

Real workouts often mix intensities, a run that includes walking breaks, or a gym session split between weight training and cardio, which this single-activity calculator doesn't model directly in one pass. For a reasonably close estimate of a mixed workout, running the calculator separately for each distinct segment, using the appropriate MET value and the actual minutes spent at that intensity, then adding the results together generally produces a more accurate total than trying to average the whole session under one blended activity type. This segmented approach is essentially how more sophisticated fitness tracking apps handle interval and circuit-style training internally, just automated across shorter time slices.

Frequently Asked Questions

How accurate are MET-based estimates?

MET values are averages derived from research on typical effort levels for each activity, actual burn varies with intensity, fitness level, terrain, and individual metabolism. Treat this as a reasonable estimate rather than an exact figure, similar to what fitness trackers and gym equipment displays provide.

My activity isn't listed, what should I do?

Pick the closest comparable activity and intensity level from the list, MET values are grouped by effort level, so a similar activity at a similar intensity will give a reasonably close estimate.

What exactly does a MET value of 1 represent?

A MET of 1 is defined as the energy cost of sitting quietly, roughly 1 kilocalorie per kilogram of body weight per hour. Every other MET value is expressed relative to that resting baseline, so an activity with a MET of 8 burns approximately 8 times the energy of sitting still for the same amount of time.

Why does the same activity have different MET values at different intensities?

MET values reflect the actual physical effort involved, and effort scales with intensity, brisk walking requires more energy per minute than a moderate stroll, and vigorous cycling requires more than a relaxed ride. That's why several activities on the list, like walking, cycling, and swimming, appear twice at different MET values, letting you pick the option that better matches your actual pace or effort level.

Does this calculator account for fitness level or efficiency?

No. MET-based formulas use a single standardized value per activity and intensity level regardless of who's performing it, but in reality, a highly trained athlete often moves more efficiently and burns somewhat fewer calories at a given pace than a less-trained person working at the same relative effort. This is a known limitation of MET-based estimates generally, not specific to this calculator.

Does calories burned during exercise replace the calories I'd burn anyway?

No, this figure represents total calories burned during the activity, not calories burned on top of what you'd have burned resting for that same period. If you want the calories burned specifically because of the exercise, above and beyond your resting rate, subtract the resting calorie cost for that duration (roughly your BMR divided by 24, multiplied by the hours spent) from this total.