Static activities — standing at your desk, gentle stretching, hatha yoga, tai chi, or even quiet mindful sitting — steadily contribute to your daily calorie burn. This calculator estimates how many calories you use during a 45-minute session of low-exertion movement by combining your body weight with the activity's metabolic equivalent (MET) value.
Enter your weight, choose an activity (or enter a custom MET), and the tool instantly returns the total calories burned, plus per-hour, per-15-minute, and per-10-minute figures. It's built for anyone building a gentle movement habit, recovering from injury, standing at a desk, or wondering how light activity adds up over a week.
The calculation follows the standard MET formula used in exercise science, so results are consistent with values used by researchers and fitness trackers.
🧘 Static Calories — 45 Minutes
Estimate calories burned during a calm, low-exertion 45-minute session.
Quick Start
Begin by selecting the activity that best matches your 45-minute session from the dropdown. The list covers common low-exertion activities such as hatha yoga, gentle stretching, standing, tai chi, and slow walking. If you have a specific MET value from a fitness device or research paper, tick the Use custom MET box and enter it directly. Then enter your body weight, choose kg or lb, adjust the session length if needed, and press Calculate.
The results panel shows the total calories for the 45-minute session, the equivalent hourly burn rate, and per-15- and per-10-minute figures. You can also copy the headline result to your notes.
Formula Explained
The tool follows the standard MET method used in exercise physiology:
Calories per minute = MET × body weight (kg) ÷ 60
Total calories = Calories per minute × minutes
MET stands for metabolic equivalent of task. One MET equals the energy you burn while sitting quietly at rest, roughly 1 kcal per kilogram of body weight per hour. An activity rated 2.5 MET therefore uses 2.5 times more energy than resting. This is the same formula used in the Wikipedia MET article and in the Compendium of Physical Activities.
Because the estimate is linear, a 45-minute session is simply three-quarters of the hourly value: total = MET × weight × 0.75.
Reference MET Values
The table lists MET values commonly cited for the activities in this calculator. Values come from the Compendium of Physical Activities and similar sources.
| Activity | MET |
|---|---|
| Sitting quietly / desk work | 1.3 |
| Standing / light standing work | 1.8 |
| Gentle stretching | 2.3 |
| Hatha / gentle yoga | 2.5 |
| Slow walking (≈3.2 km/h) | 2.8 |
| Tai chi / qigong | 3.0 |
Worked Examples
Example 1: A 70 kg person does 45 minutes of hatha yoga (2.5 MET). Calories per minute = 2.5 × 70 ÷ 60 = 2.917. Total = 2.917 × 45 = 131.3 kcal.
Example 2: A 165 lb person (≈74.8 kg) stands for 45 minutes (1.8 MET). Calories per minute = 1.8 × 74.8 ÷ 60 = 2.244. Total = 2.244 × 45 = 101.0 kcal.
Notice that low-MET activities still add up: five 45-minute yoga sessions per week would burn roughly 650 kcal for a 70 kg person, about the energy in a small meal.
Tips & Best Practices
- Use your current body weight, not a goal weight. The equation is weight-dependent and becomes more accurate when refreshed as you change.
- MET values assume a typical adult. Fitness level, age, and muscle mass can shift the real number up or down by 10–20%.
- If you are wearing a heart-rate monitor, you can compare its calorie estimate with this MET-based figure; large differences often mean your device is using a personalised efficiency factor.
- For gentle movement sessions, try to keep a steady pace. The MET values in the dropdown describe average exertion, not peak effort.
To build a gentle-movement habit, track your weekly total with a simple note: sum each 45-minute session's calories and aim for a gradual increase in frequency rather than intensity.
Frequently Asked Questions
Is a 45-minute static session really worth counting?
Yes, if you are mostly sedentary. Even 1.3 MET desk work adds up over a workday. For a 70 kg person, 8 hours of sitting burns roughly 485 kcal — comparable to a moderate workout for some people.
Why does the result differ from my fitness tracker?
Trackers often incorporate heart rate, age, sex, and a personal fitness profile. The MET formula here is a population-average estimate. Differences of 10–20% are normal.
Can I use this for meditation or breathing exercises?
Sitting meditation is typically around 1.0–1.3 MET, similar to quiet rest. You can choose the first dropdown item or enter a custom MET near 1.0 to estimate those sessions.
What if my session is not 45 minutes?
The calculator allows any duration, but it is optimised for 45-minute blocks. Change the minutes field and the formula scales linearly.
Additional Resources
For deeper reading on energy expenditure and MET values, see the Metabolic equivalent of task article, the Compendium of Physical Activities, and the Harvard Health calorie guide. These sources provide the research basis for the MET values used here.