# Turn an exercise session into a useful estimate
A calories burned calculator is most helpful when it makes its assumptions visible. This tool lets you choose the movement, select the effort, enter your body weight and time, and see both the full activity cost and the amount above rest. It is designed for comparing sessions, not for pretending that a number from a table is a measurement of your body. 12 activity references
3 effort bands
2 calorie views
# Why activity, intensity, weight, and time all matter
The same time can cost different amounts
Thirty minutes of gentle yoga, brisk walking, and running are different observations. The activity and effort choice changes the MET value before body weight or duration enters the calculation.
The same activity can change with the effort
A casual cycle and a hard cycle are not interchangeable. Choose the effort that describes most of the session and do not let a short sprint define the whole workout.
# Gross calories and net calories answer different questions
| View | What it includes | When it helps |
|---|---|---|
| Gross calories | The estimated energy cost of the selected activity. | Comparing the full demand of different sessions. |
| Net calories | The estimated activity cost after subtracting the resting baseline for that time. | Understanding the additional cost above simply resting. |
| Calories per minute | The gross estimate divided by session duration. | Seeing how intensity changes the rate of energy use. |
Treat the result as a reference line
MET values are population references, not a direct reading of your metabolism. Fitness, age, body composition, technique, terrain, and the way an activity is performed can move the real energy cost away from the table value.
# How to get a more useful comparison
- Repeat the description: compare the same activity and effort band when you want to compare sessions.
- Measure the time honestly: include only the minutes you were actually active if your goal is exercise comparison.
- Keep the weight unit consistent: the metric and imperial controls change the display while preserving the physical weight.
- Use trends, not precision theater: a rounded estimate can show a direction without becoming a promise about weight change.