Calculate workout afterburn calories from MET, weight, duration, distance, or workout calories and estimate weekly and yearly burn.
Disclaimer: This is just an estimate for planning purposes. Real calories burn depends on many individual factors. Seek medical professionals for help.
Afterburn Effect Formula
The afterburn effect is an estimate of extra calories burned after exercise, often discussed as excess post-exercise oxygen consumption, or EPOC. This calculator supports three methods: a MET-based formula, a percent-of-workout-calories method, and a distance-based method.
MET formula mode
AE = kg * MET * min * 0.014
Workout Calories = min * MET * 3.5 * kg / 200
- AE = afterburn effect in kcal
- kg = body weight in kilograms
- MET = exercise intensity in metabolic equivalents
- min = exercise duration in minutes
- Workout Calories = estimated calories burned during the workout
Percent method mode
AE = Workout Calories * Afterburn Percent / 100
Weekly AE = AE * Sessions Per Week
Yearly AE = Weekly AE * 52
- AE = afterburn effect per workout in kcal
- Workout Calories = calories burned during the exercise session
- Afterburn Percent = chosen EPOC estimate as a percentage of workout calories
- Sessions Per Week = number of similar workouts per week
Distance method mode
Duration Minutes = Distance Miles / Speed MPH * 60
Workout Calories = min * MET * 3.5 * kg / 200
AE = Workout Calories * Afterburn Percent / 100
- Distance Miles = distance converted to miles
- Speed MPH = speed converted to miles per hour
- min = calculated exercise duration in minutes
- MET = estimated intensity based on activity and speed
- Afterburn Percent = selected or automatically estimated percent
In the MET formula tab, you can enter any 3 positive values among body weight, duration, MET intensity, and afterburn effect. The missing value is solved from the formula. In the percent method tab, you enter workout calories and choose or enter an afterburn percent. In the distance method tab, speed, distance, activity, and body weight are used to estimate workout calories first, then afterburn is calculated from a selected or automatic percent.
Typical Afterburn Percent Estimates by Workout Type
| Workout type | Typical afterburn range | Calculator midpoint |
|---|---|---|
| Endurance recovery zone | 0% to 5% | 2.5% |
| Endurance middle zone | 5% to 10% | 7.5% |
| Endurance intensive intervals | 10% to 15% | 12.5% |
| Strength, medium intensity | 5% to 10% | 7.5% |
| Strength, high intensity | 10% to 15% | 12.5% |
| Strength HIT or circuit training | 15% to 20% | 17.5% |
Common MET Values Used for Exercise Estimates
| Activity | Approximate MET | Intensity note |
|---|---|---|
| Easy walking | 2.8 | Low intensity |
| Brisk walking | 4.3 | Moderate intensity |
| Moderate cycling | 6.8 | Moderate to hard |
| Circuit training | 8.0 | Hard |
| Running 6 mph | 9.8 | Vigorous |
| HIIT intervals | 12.0 | Very vigorous |
Example Calculations
Example 1: MET formula
You weigh 80 kg, exercise for 45 minutes, and use an intensity of 8 METs.
AE = 80 * 8 * 45 * 0.014 = 403.2 kcal
The estimated afterburn effect is 403.2 kcal. The workout calorie estimate is:
Workout Calories = 45 * 8 * 3.5 * 80 / 200 = 504 kcal
Example 2: Percent method
You burned 600 kcal during a workout and choose a 12.5% afterburn estimate.
AE = 600 * 12.5 / 100 = 75 kcal
The estimated afterburn effect is 75 kcal per workout. If you do this 4 times per week:
Weekly AE = 75 * 4 = 300 kcal
FAQ
What is the afterburn effect?
The afterburn effect is the extra energy your body may use after exercise while returning to a resting state. It can include processes such as restoring oxygen levels, clearing metabolic byproducts, repairing tissue, and returning heart rate and body temperature toward normal.
Why do the MET formula and percent method give different results?
They use different assumptions. The MET formula uses body weight, workout duration, and intensity to estimate afterburn directly. The percent method treats afterburn as a percentage of calories burned during the workout. Because afterburn varies by fitness level, training style, workout structure, and recovery demand, both methods should be treated as estimates rather than exact measurements.
Which afterburn percent should you use?
Use a lower percent for easy or steady workouts and a higher percent for hard intervals, circuit training, or demanding strength sessions. For many moderate workouts, 5% to 10% is a practical estimate. For very intense sessions, 10% to 20% may be more appropriate.
