Free exercise calorie calculator

Estimate calories burned without over-crediting every workout.

Use standard MET values to estimate calories burned from walking, running, cycling, strength training, swimming, sports, and everyday sessions. The point is to size the session realistically, then use the number carefully inside TDEE and fat-loss planning.

Start the calculatorAdd it to TDEE

Best use case

Comparing session sizes and planning weekly activity volume more realistically.

Biggest caveat

Burn is estimated, not exact, so exercise calories should be used conservatively.

Best follow-up

TDEE and calorie-deficit planning matter more than the raw burn number by itself.

On This Page

Exercise calorie calculator

Turn a workout into a realistic calorie estimate.

This tool uses MET values to estimate calories burned from exercise based on body weight, session length, and activity type. Use it to size the session properly, not to pretend exercise calories are perfectly exact.

Example sessions
kg
min

Add body weight, duration, and an activity.

The result is based on standard MET values, which makes it useful for comparing sessions and planning calories without pretending exercise burn is exact to the last decimal.

Read the number as a planning estimate, not as perfect arithmetic

The most useful thing about workout calorie estimates is comparison. Once you start treating them like exact permission slips to eat more, their value drops quickly.

Estimate, not exact truth

MET-based calorie burn is useful for planning and comparison, but real-world burn still varies by fitness level, efficiency, terrain, and effort.

Duration matters as much as intensity

A shorter hard session can burn fewer total calories than a longer moderate one, which is why comparing both time and METs matters.

Weekly volume changes the picture

One workout is rarely the whole story. Repeating a moderate session consistently often matters more than finding the highest-burn workout once.

MET values tell you how costly the session is relative to rest

METs are a useful common language for activity cost. They make it easier to compare a brisk walk, a moderate bike ride, and a hard circuit without inventing your own scoring system.

Light activity

Below 3 METs

Walking slowly, light stretching, or gentle movement. Useful for volume, recovery, and non-exercise activity.

Moderate activity

3 to 5.9 METs

Brisk walking, easier cycling, and moderate lifting. Often the most sustainable intensity for frequent training.

Vigorous activity

6 to 8.9 METs

Running, circuit work, harder cycling, and many sports. Good calorie burn, but recovery starts to matter more.

Very vigorous activity

9 METs and above

Fast running, hard swimming, jump rope, and intense intervals. High burn per minute, but not always the best default for adherence.

Use exercise calories to support the plan, not to replace the plan

Exercise can make a deficit easier and improve fitness dramatically. It is still only one lever. Most people need calmer calorie targets, enough protein, and a repeatable training week more than they need a bigger single-workout number.

Do not count exercise twice

If your TDEE estimate already reflects your usual training pattern, adding the whole workout burn again can overshoot your calories.

Do not assume you should eat it all back

When fat loss is the goal, most people do better with conservative exercise-calorie credit rather than full compensation.

Choose repeatable sessions

The best workout for calorie planning is the one you can recover from and repeat for weeks, not the one with the flashiest per-minute burn.

Frequently Asked Questions

How accurate are exercise calorie calculators?

They are directionally useful, especially for comparing activities and planning weekly volume, but they are still estimates. Real burn varies with efficiency, terrain, technique, and actual effort.

Should I eat back exercise calories?

Not automatically. If fat loss is the goal, most people do better with conservative exercise-calorie credit, especially when their TDEE estimate already reflects regular training.

Why do fitness watches show different numbers?

Wearables use proprietary algorithms that blend movement, heart rate, and user data. MET-based estimates are more standardized, but neither method is perfect.

Which exercises burn the most calories?

Fast running, hard cycling, hard swimming, intervals, and vigorous circuits burn the most per minute, but the best long-term choice is usually the one you can sustain repeatedly.

Is higher intensity always better for fat loss?

No. Higher intensity can raise calories per minute, but total weekly volume, recovery, hunger management, and adherence usually matter more for actual progress.

Research and reference notes

1. 2024 Adult Compendium of Physical Activities

Updated activity compendium with a large MET database covering hundreds of common activities.

2. Ainsworth et al. (2011) Compendium Update

Foundational update to the Compendium of Physical Activities and MET-value framework.

3. LaForgia et al. (2006)

Research on excess post-exercise oxygen consumption and how intensity affects afterburn.

4. WHO Guidelines on Physical Activity and Sedentary Behaviour

Public-health guidance on activity volume and intensity for general health.