MET Calculator

What a MET value is actually measuring

A MET (Metabolic Equivalent of Task) expresses the energy cost of an activity as a multiple of resting metabolic rate. By definition, 1 MET = 1 kcal per kilogram of body weight per hour — the approximate energy cost of sitting quietly. An activity with a MET of 8.0 requires eight times the energy of sitting.

METs allow comparison of activity intensity across different people and activities without requiring laboratory measurement. Activities below 3 METs are light, 3 to 5.9 are moderate, and 6 or more are vigorous according to public-health intensity classifications. That is why MET values show up on calorie-burn pages, exercise tables, and physical-activity guidelines at the same time.

That also answers the common question what does MET mean in exercise. It is shorthand for metabolic equivalent of task, and the metabolic equivalent formula gives you a standard way to compare a treadmill walk, a cycling session, an elliptical workout, or a custom activity without needing a lab test for each one.

How the calorie calculation works

Calories = MET × body weight (kg) × duration (hours). This formula gives a total energy expenditure estimate that includes the resting metabolic contribution — the net activity calories above resting can be approximated by using (MET − 1) as the multiplier.

MET values in this calculator are drawn from the 2011 Compendium of Physical Activities (Ainsworth et al., Medicine & Science in Sports & Exercise). The Compendium assigns standardised MET values based on published oxygen consumption measurements, which is why rival pages often rank for both calories burned calculator and MET chart style search terms.

If you arrived here looking for a met to calories calculator or mets to calories calculator, this is the conversion you need. Multiply the MET value by body weight in kilograms and by time in hours to estimate gross calories, then use MET minus 1 if you specifically want the activity-only portion above rest.

MET calculator formula reference

The calculator uses one MET value, one body weight, one duration, and one weekly frequency to build a simple planning model. That makes it easier to compare activities than a tracker screen with hidden assumptions.

The weekly MET-minute load is especially helpful when you want to compare a repeatable exercise habit rather than only a single workout.

Gross calories, net calories, and custom MET values

One of the most common user confusions on MET pages is whether the result is gross or net calories. Gross calories include the resting metabolism you would have used anyway during that time. Net calories attempt to isolate the extra energy cost above rest. Both can be useful, but they answer slightly different questions.

Custom MET entry matters for the same reason. Published activity lists contain hundreds of values, but real sessions still vary by pace, terrain, technique, and effort. A calculator that accepts a custom MET is more useful for coaches, clinicians, and users working from a published activity table or research paper rather than from a generic preset alone.

That flexibility is especially useful for treadmill, cycling, and elliptical sessions because machine displays and preset activity names often do not line up perfectly with Compendium entries. A good exercise MET calculator lets you use a named activity when it matches your session and a custom MET when you need tighter control.

Quick custom-MET presets are most useful when you know the intensity band but not the exact Compendium code. A light-movement preset can help you sanity-check recovery work, while a vigorous or very vigorous preset helps you compare harder intervals against the same workout duration. The calculator is more useful when it lets you move between these checkpoints without manually re-entering the number each time.

How to interpret a MET value as oxygen demand

MET values are not just calorie multipliers. By convention, 1 MET is also treated as about 3.5 mL of oxygen per kilogram of body weight per minute. That means a 6-MET session corresponds to an oxygen demand of roughly 21 mL/kg/min, while a 10-MET session corresponds to about 35 mL/kg/min. Translating the MET result into oxygen cost helps explain why the same number can be useful in exercise physiology, rehab planning, and fitness programming instead of only in calorie-burn lookups.

This interpretation is especially useful when you are comparing activities that burn similar calories but impose different cardiorespiratory demands. A higher MET value means a higher oxygen requirement per minute, which is why the page now shows both the VO2-equivalent rate and the estimated oxygen used across the session. That does not turn the result into a laboratory measurement, but it does help place the MET number in more practical physiological terms.

Worked example: moderate walking repeated three times a week

Suppose you choose brisk walking with a MET value of 4.3, enter a body weight of 70 kg, set the duration to 45 minutes, and repeat that workout three times per week. Gross calories per session are 4.3 × 70 × 0.75 = about 226 kcal. Net calories above resting are about (4.3 − 1) × 70 × 0.75 = 173 kcal.

On a weekly basis, that same plan adds roughly 678 gross kcal, 519 net kcal, and 581 MET-minutes. That makes the weekly output more useful than a single-session figure alone, because it helps you compare whether changing duration, intensity, or frequency moves the plan enough to matter.

Why MET-based calorie estimates differ from trackers

MET-based estimates assume average body composition and a moderate pace within the activity. Actual calorie burn varies with individual fitness level, body composition, terrain, equipment, and pacing. Studies comparing MET formula estimates to indirect calorimetry show mean errors of 10–20% at the individual level.

For heavier individuals, MET formula estimates can overestimate calorie expenditure because absolute oxygen cost per kilogram is lower in people with more body fat. For lean, highly fit individuals, estimates may slightly underestimate. Fitness trackers take a different route by combining movement, heart rate, and user-specific settings, so disagreement between the two methods is normal rather than a sign that one of them must be broken.

This is also why two treadmill calorie displays, a watch, and a MET calculator can all disagree on the same workout. They are using different inputs, different assumptions, and different ideas about whether resting metabolism should be included, so the correct comparison is usually trend versus trend rather than expecting perfect agreement on a single session.

How to use weekly MET minutes without over-reading the estimate

Weekly MET minutes help translate a one-off session into a repeatable workload. If a 45-minute workout at 4.3 METs is repeated three times, the weekly total becomes 581 MET-minutes, which gives you a quick way to compare whether adding another session or raising the pace changes the plan enough to matter. That is often more useful for exercise planning than staring at one calorie number in isolation.

At the same time, MET minutes are still planning tools rather than proof of training quality, fat loss, or medical safety. They do not capture recovery status, soreness, injury history, medication effects, or how hard a session felt for you personally. If you are using calorie-burn or MET targets around heart disease, diabetes, pregnancy, eating-disorder recovery, or supervised rehabilitation, verify the plan with a qualified healthcare professional rather than relying on one online estimate.

Using the calculator to plan toward 500 and 1000 MET-minutes per week

Many activity guidelines are easier to interpret when they are translated into weekly MET-minutes. A practical rule of thumb is that roughly 500 to 1000 MET-minutes per week corresponds to the range many public-health and exercise-planning resources use for general aerobic activity. That does not make 500 a magic line or 1000 a universal ideal, but it does give you a useful planning yardstick.

This is why a strong MET calculator should not stop at one session. If the current workout is 105 MET-minutes, you can immediately see that five similar sessions would land around 525 MET-minutes, while ten would push toward 1050 MET-minutes. That turns the page into a weekly planning tool instead of a one-off calorie lookup.

The practical use case is simple: keep the same MET and session length, then change only weekly frequency to understand what kind of routine gets you into the lower or higher planning range. If your schedule cannot support more sessions, you can often reach the same weekly MET-minute target by extending the duration or moving to a higher-MET activity.

What 500, 1000, or 1500 MET-minutes looks like across 2 to 5 sessions

Users often understand a weekly target only after it is translated into a schedule. If your current session generates 150 MET-minutes, then 500 MET-minutes can be reached with about four sessions, 1000 MET-minutes with about seven, and 1500 MET-minutes with about ten. But if you only plan to train two or three days per week, the more useful question is how long each session has to be at the current MET value to land in that weekly range.

That is why the calculator now breaks weekly targets down by training frequency. The same weekly MET-minute target can be reached through longer sessions on two days, moderate sessions on three or four days, or shorter sessions on five days. This makes the page more useful for people planning around work shifts, childcare, team training days, or recovery constraints rather than pretending every schedule can absorb daily exercise.

Why body weight and calorie targets change the planning question

The same MET session does not burn the same number of calories for every person because body weight is part of the formula. That is why the page now shows the same workout at lighter and heavier body weights. It helps answer the common search question of why two people doing the same treadmill walk, bike ride, or circuit session can see different calorie totals even when the MET value is identical.

Calorie-target timing is the other common planning question. People often ask how long they would need to repeat the same MET session to reach 250, 500, or 750 calories. That is a better real-world use of a MET calculator than treating the current session as if it must always be exactly 30 or 45 minutes long.

Gross and net calorie targets also answer slightly different questions. Gross targets are useful when you want a total session energy estimate. Net targets are more useful when you specifically want the activity-only portion above resting, but the timing will always be longer because the resting share has been stripped out.