Calories Burned Calculator

Using the calories burned estimate

Activity calorie estimates translate an activity's MET value, body weight and duration into a modeled energy expenditure. MET summarizes an activity's energy cost relative to a reference resting level. This calculator uses fixed values for listed activities rather than measuring your movement or metabolism. It is useful for comparing approximate activity-duration scenarios, but actual expenditure can vary with pace, technique, environment, fitness and individual physiology.

Step-by-step inputs

1. Activity. Choose the closest listed activity and pace. The stored MET is a broad assumption, not a sensor reading for your session. Starting example: Running (5 mph) .
2. Your weight. Enter body weight in pounds. The equation converts that input to kilograms before calculating energy. Starting example: 170 lb.
3. Duration. Use minutes spent doing the modeled activity. If a session includes long breaks or mixed intensities, treating the entire session as one activity can overestimate expenditure. Starting example: 30 min.

Worked example with the starting values

Using the starting inputs, the estimate is Calories burned: 308 kcal.

The engine multiplies the selected MET by body weight in kilograms and duration in hours. Its per-minute and per-hour outputs use the same assumptions. This is a gross activity-energy estimate: it includes a resting component rather than isolating only extra energy above rest.

Per minute

10.3

Per hour

617

MET value

8

Compare duration scenarios

All other inputs stay at their starting values. These are modeled comparisons, not quotes, predictions or individual recommendations.

Make a useful comparison

Compare different durations at the same activity and weight to understand the model's proportional relationship. Twice the modeled time produces twice the estimate, but actual intensity can change during a longer session. Use the duration of active movement rather than a class's full scheduled length if much of it was spent resting.

When comparing with a wearable, check whether it reports total or active calories. A gross MET estimate and an active-only estimate can differ even if both are labeled calories burned. That difference is not necessarily evidence that one device or tool is broken.

Use activity estimates as context for movement, not as a rigid food budget. An activity-adjusted daily energy estimate may already include exercise. Adding the entire session total again can double-count energy use, and nutrition needs are not determined by a workout number alone.

Common mistakes to avoid

• The listed activity labels group people with different techniques and effort levels. A fixed MET cannot capture every individual workout.
• The equation scales directly with weight and time, so unit mistakes scale the estimate too. Entering kilograms as pounds or hours as minutes changes its meaning.
• This is not a medical measurement or a precise weight-change predictor. Avoid using it to justify under-fueling, compensate for food or override symptoms during exercise.