Wondering how many calories you burn during a gentle 30-minute workout? This calculator uses the MET (Metabolic Equivalent of Task) method to estimate energy expenditure for low-impact activities like walking, cycling, yoga, stretching, and light gardening. Just choose an activity, enter your weight, and you'll get a realistic half-hour calorie estimate in seconds.
Because the same activity can feel different from person to person, the tool also shows your per-minute burn, hourly rate, and the exact MET value used. Want a more precise estimate? Switch on the custom MET field to enter a value from your wearable or a fitness database. It's a handy companion for anyone building a sustainable movement habit — no need for intense sessions to make progress.
🧮 Estimate Your Burn in 30 Minutes
Pick a gentle activity and enter your weight to see estimated calories burned in a half-hour session.
Per minute: — kcal
Hourly rate: — kcal/hr
MET value used: —
How to Use This Tool
Select the activity closest to what you plan to do from the dropdown list, then enter your body weight and choose kilograms or pounds. Press Calculate and the tool instantly shows three useful numbers: the total kilocalories burned in a 30-minute session, the per-minute burn rate, and the hourly equivalent. The MET value used for the estimate is displayed as well, so you always know what the result is based on.
If you have a precise MET value from a fitness tracker, a training app, or the Compendium of Physical Activities, tick the Use a custom MET value box and type it in. This overrides the activity dropdown and is handy when your intensity differs from the typical average. Use Reset to clear the form, or click one of the quick weight preset buttons to fill in a common body weight instantly.
Formula Explained
The estimate relies on the standard metabolic equivalent (MET) approach described in the Compendium of Physical Activities. One MET equals the energy you burn while sitting quietly at rest — roughly 3.5 milliliters of oxygen consumed per kilogram of body weight per minute. Each activity in the list has a MET number that tells you how many times harder than rest that activity is.
The formula used here is: kcal per minute = MET × body weight (kg) × 3.5 ÷ 200. For a 30-minute session, the per-minute value is simply multiplied by 30. The ÷ 200 converts the oxygen-based figure into kilocalories per minute. This is the same general method many fitness trackers and exercise databases use, which makes results reasonably comparable across devices.
Worked Examples
Example 1 — Brisk walking at 4.3 MET: A 70 kg person walks at 3.5 mph. Per-minute burn = 4.3 × 70 × 3.5 ÷ 200 = 5.27 kcal/min. Over 30 minutes that is about 158 kcal — roughly the energy in one banana plus an apple.
Example 2 — Gentle yoga at 2.5 MET: A 132 lb (60 kg) person does a relaxing Hatha session. Weight converts to kg as 132 ÷ 2.20462 ≈ 59.9 kg. Per-minute burn = 2.5 × 59.9 × 3.5 ÷ 200 ≈ 2.62 kcal/min, so 30 minutes totals about 79 kcal.
Example 3 — Comparing intensities: The same 70 kg person burns about 77 kcal in 30 minutes of light stretching (2.5 MET) but about 294 kcal on a moderate bike ride (8.0 MET) — nearly four times more. Intensity matters as much as time.
MET Reference Table
Typical MET values for common half-hour activities, with estimated calories for a 70 kg person. Lighter people burn less; heavier people burn more.
| Activity | MET | kcal in 30 min (70 kg) |
|---|---|---|
| Light stretching | 2.3 | 85 |
| Hatha yoga | 2.5 | 92 |
| Gentle walking (2 mph) | 2.8 | 103 |
| Tai chi / Pilates | 3.0 | 110 |
| Light gardening | 3.5 | 129 |
| Leisure cycling (under 10 mph) | 4.0 | 147 |
| Brisk walking (3.5 mph) | 4.3 | 158 |
| Moderate elliptical trainer | 5.0 | 184 |
| Very brisk walking (4.5 mph) | 6.0 | 221 |
| Moderate cycling (12–14 mph) | 8.0 | 294 |
Values are based on the 2011 Compendium of Physical Activities and rounded to the nearest whole calorie.
Factors Affecting Accuracy
The MET formula is a population average, so your personal result can differ by 10–30% or more. Key factors include body composition (muscle burns more than fat at the same weight), fitness level (trained individuals often burn fewer calories for the same task), terrain, temperature, and how hard you actually push yourself — a moderate pace is subjective. The calculator also assumes a steady intensity for the entire 30 minutes, which rarely happens in real life.
Treat the result as a practical planning guide rather than a precise measurement. If you need a closer estimate, wearable devices with heart-rate monitoring generally do better than MET-based tables, though they still tend to overestimate for many users.
Frequently Asked Questions
Is 30 minutes of exercise enough for health and weight loss? Yes. Health authorities such as the World Health Organization recommend at least 150 minutes of moderate-intensity activity per week — five 30-minute sessions fits that guideline exactly. For weight loss, 30-minute sessions can help create a calorie deficit, especially when combined with sensible eating, but results depend on intensity and overall daily energy balance.
Should I eat back the calories this calculator shows? Generally no. Exercise calorie estimates, from calculators and wearables alike, tend to be optimistic. It is safer to treat them as a rough bonus and focus on consistent healthy eating rather than adding back every calorie you think you burned.
Why does my treadmill show a different number? Treadmills and ellipticals typically estimate calories from speed and incline alone, without your weight or individual efficiency. This calculator uses your body weight directly, so the numbers can legitimately differ. If the machine lets you enter your weight, do it before comparing readings.