What does this tool do?
The Calories Burned Calculator estimates the energy you spend based on your weight, activity duration, and the exercise you choose. It supports walking, running, cycling, swimming, HIIT and many more, making it handy for anyone tracking workouts.
How to use it
- Enter your values into the fields.
- The result is calculated instantly.
- Read or copy the result.
How it works with MET values
The calculation relies on scientific MET (Metabolic Equivalent of Task) coefficients. The formula is simple: MET × weight (kg) × time (hours). For example, a 70 kg person running at 6 mph for 30 minutes burns 9.8 MET × 70 × 0.5 ≈ 343 calories. Yoga sits at MET 3.0 while HIIT is 10.0, so intense activities spend far more energy. Each activity's MET value appears right on its button.
Kilograms and pounds support
Switch between metric (kg) and imperial (lbs) with a single tap; the tool automatically converts pounds to kilograms before calculating. You can set the duration anywhere from 1 to 300 minutes and pick from 15 different activities. The result updates instantly and can be copied with one click, so you can drop it straight into your training log.
Frequently asked questions
How accurate are the results?
The results are estimates based on standard MET tables. Actual calorie burn varies with age, muscle mass, workout intensity and metabolism, so treat the number as a useful reference rather than an exact figure.
Which activities are supported?
Fifteen activities are available, including walking, running at two paces, cycling, swimming, yoga, jump rope, weight training, HIIT, basketball, soccer, dancing, hiking, plus sitting and standing.
What is a MET value?
MET is a coefficient showing how many times more energy an activity uses compared to resting. 1 MET represents rest, while 10 MET means ten times the resting energy expenditure.
Is Calories Burned Calculator free?
Yes. Calories Burned Calculator and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Calories Burned Calculator works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.