Fitness
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Calories Burned Calculator.
Estimate calories burned for any activity using MET values and your body weight.
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Walking, brisk (4 mph) · MET 4.3
How to Use
Choose an activity, enter your weight in kilograms, and how long you did it. The calculator uses standard MET values to estimate the calories you burned.
FAQs
How are calories burned calculated?
Calories = MET × weight (kg) × duration (hours). MET (Metabolic Equivalent of Task) is a standard value for each activity's intensity.
What is a MET?
A MET of 1 equals your resting energy expenditure. Higher MET values mean more intense activity. Running fast can reach 14+ METs.
Is this accurate for everyone?
It's a research-based estimate. Actual burn varies with fitness level, body composition, age, and terrain. Use it as a planning guide, not a measurement.
How to Use the Calories Burned Calculator
Estimate calories burned for any activity using MET values and your body weight.
- Select an activity from the list (each has a standard MET value).
- Enter your body weight in kilograms.
- Enter the duration of the activity in minutes.
- Read the estimated calories burned and per-minute rate.
MET Calorie Formula
Calories Burned
MET (Metabolic Equivalent of Task) captures activity intensity; 1 MET ≈ resting energy.
Example:
Input: Brisk walk (MET 4.3), 70 kg, 60 min
Calculation: 4.3 × 70 × 1
Result: ≈ 301 kcal
Real-World Use Cases
Workout Tracking
Estimate burn for runs, rides, and gym sessions.
Weight Loss
Plan deficits by knowing how many calories an activity burns.
Tips
Tips
- MET calorie estimates are guidance, not measurements.
- Heavier people burn more calories for the same activity — that's reflected in the math.
Related Calculators
Cite this calculator
Canonical URL: https://mathify.one/en/fitness/calories-burned
Cite as: Mathify. (2026). Calories Burned Calculator. https://mathify.one/en/fitness/calories-burned
Use Cases
Track workout calorie burn
Estimate how many calories you burn during a specific exercise session to help manage your fitness goals.
Example: Enter 'running' at 70 kg for 30 minutes to see approximate calories burned.
Compare different activities
Compare calorie burn across various activities to plan a varied workout routine.
Example: Compare cycling vs. swimming for the same duration and weight.
Frequently Asked Questions
- How does the calculator estimate calories burned?
- It uses the MET (Metabolic Equivalent of Task) value for your chosen activity, your weight in kilograms, and the duration in minutes. The formula is: Calories burned = MET × weight (kg) × duration (hours).
- What activities can I choose from?
- You can select from walking, running, cycling, swimming, weights, and 20+ other common activities. Each activity has a specific MET value that represents its intensity.
- Is this estimate accurate for everyone?
- It provides a general estimate based on average MET values. Individual factors like age, fitness level, and metabolism can affect actual calories burned, so use it as a reference.
Tips & Common Mistakes
Tips
- Enter your current weight in kilograms for the most accurate estimate.
- Use the actual duration of your workout, including warm-up and cool-down if they are part of the activity.
- For interval training, choose the activity that best matches the primary intensity level.
- Re-calculate as your weight changes to keep your estimates up to date.
Common Mistakes to Avoid
- Entering weight in pounds instead of kilograms – always convert to kg.
- Using duration in hours instead of minutes – the calculator expects minutes.
- Selecting an activity that doesn't match your actual exercise – choose the closest match.
Last updated: August 13, 2026