Stationary activities — sitting at a desk, standing during light chores, gentle stretching, Hatha yoga, tai chi, or slow stationary cycling — still burn calories. Understanding how many helps you build a more accurate picture of your daily energy expenditure, even on low-movement days.
This calculator estimates calories burned during a 15-minute session of any stationary or gentle activity you select. It uses your body weight and the Metabolic Equivalent of Task (MET) value for each activity, then applies the standard formula used in exercise physiology: calories = MET × 3.5 × body weight (kg) × minutes ÷ 200.
It is designed for beginners, older adults, office workers, and anyone returning to exercise after an injury or extended break. Enter your weight, pick an activity, and adjust the session length if you like — the results show total calories, per-minute burn, and a step-by-step breakdown.
⚖️ Your Weight
🚶 Stationary Activity
⏱️ Session Length
How It Works
The calorie estimate in this tool comes from the Metabolic Equivalent of Task (MET) method, the standard approach used in exercise physiology research. MET expresses how much more energy an activity requires compared with sitting quietly at rest. A MET of 1.0 means resting energy expenditure; a MET of 3.0 means the activity uses roughly three times the energy of resting. Even stationary movement matters: folding laundry, gentle stretching, and slow yoga all nudge your MET above baseline.
To calculate calories, the tool multiplies the MET value of your chosen activity by your body weight in kilograms, a constant of 3.5 ml of oxygen per kilogram per minute, and the number of minutes you were active. The result is then divided by 200 to convert oxygen use into kilocalories, since each liter of oxygen consumed corresponds to about 5 kcal and a standard conversion factor of 200 emerges from the metabolic equations used in exercise science.
The MET values used here are based on published activity compendia. You can review the original intensity classifications in the Compendium of Physical Activities. Because everyone's metabolism differs, treat the results as a practical estimate rather than an exact measurement.
Step-by-Step Guide
- Enter your body weight in pounds or kilograms. If you are not sure, a bathroom scale is the easiest way to get it.
- Select the stationary activity that best matches what you actually did. The dropdown covers common options from sitting quietly to very light stationary cycling.
- Adjust the session length if you want a different duration. The default is 15 minutes, and the preset buttons let you switch to 10, 20, or 30 minutes without typing.
- Click Calculate. The result area shows your total calories, calories per minute, and an hourly projection, followed by a step-by-step summary of the math.
- Use the Copy result button to save the number to your phone or clipboard for your fitness log.
Reference Table
The table below shows approximate calories burned in 15 minutes for a 70 kg (154 lb) person. Use the calculator for personalized numbers based on your own weight.
| Activity | MET | kcal per 15 min (70 kg) |
|---|---|---|
| Sitting quietly (watching TV, reading) | 1.3 | 24 |
| Standing or desk work | 1.5 | 28 |
| Cooking / light kitchen tasks | 2.0 | 37 |
| Mild stretching | 2.3 | 42 |
| Hatha yoga | 2.5 | 46 |
| Tai chi | 3.0 | 55 |
| Very light stationary cycling | 3.0 | 55 |
Worked Examples
Factors Affecting Accuracy
MET values are population averages. Your personal burn rate depends on age, sex, muscle mass, body composition, ambient temperature, and how efficiently you move. Someone with more muscle mass may burn slightly more; someone who is very economical in their movement may burn slightly less. Clothing, footwear, fidgeting, and even the surface you stand on can nudge the number up or down.
The formula also assumes you are performing the activity continuously for the full session. If you take breaks, pause the timer mentally, or include rest periods, the average MET over the session will be lower than the selected value. Use the number as a planning guide, not a laboratory measure.
Frequently Asked Questions
Why is my calorie number so small? Stationary activities require little movement, so their MET values are close to resting. A 15-minute block naturally burns fewer calories than 15 minutes of jogging. The tool is useful for showing that even gentle movement contributes to your daily total, not for dramatic workouts.
Can I change the 15-minute window? Yes. The session length input is fully adjustable, and quick presets make it easy to compare 10, 20, or 30 minutes. The title emphasizes 15 minutes because that is a common gentle-movement session length, but the math works for any duration.
Does posture or fidgeting change the result? Yes. Standing burns slightly more than sitting, and fidgeting can add a few calories per hour. The table includes separate categories for sitting and standing, so pick the closest match to your actual behavior.
What if my activity is not listed? Choose the closest MET category. If you are pedaling a stationary bike at a moderate-to-vigorous effort, the very light cycling option will under-estimate your burn; for that, use a specific cycling calorie calculator. For other gentle movement styles, compare with a tai chi calorie calculator or a yin yoga calorie calculator when those practices are closer to your session.