About the Exercise Duration Calculator
How long you need to exercise to burn a target number of calories at a given intensity.
Also known as: how long to burn calories, workout length, time to burn calories.
How to use this calculator
- Enter calories to burn, activity, weight unit and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Minutes = target kcal ÷ (MET × 3.5 × kg ÷ 200)
Worked example
Using the values pre-filled in the calculator above:
- Calories to burn = 500 kcal
- Activity: Walking, brisk (5.5 km/h)
- Weight unit: kg
- Body weight = 75 kg
the calculator returns:
- Duration needed: 1 h 29 min
- Minutes: 89
- Burn rate: 5.6 kcal/min