The Rolling MET Calculator estimates calories burned during low-impact activities — walking, cycling, gentle yoga, Tai Chi, pilates, stretching, and light water aerobics. Instead of slapping one fixed MET value on an activity, it rolls smoothly between the standard metabolic equivalents published in the Compendium of Physical Activities, adjusting continuously to your actual speed. That means a 2.5 mph recovery stroll and a brisk 4 mph walk each get their own fair calorie figure.
Enter your body weight, choose an activity, and set your duration. For walking and cycling, add your speed in mph or km/h to trigger the rolling interpolation; for gentle movement classes, the calculator uses the standard MET for that discipline. Results show your MET value, calories per minute, total calories, and MET·minutes, plus a formula breakdown so you can verify the math.
Perfect for recovery days, gentle fitness tracking, or simply comparing light exercise to more intense workouts, this tool keeps estimates both accurate and easy to read.
📊 Rolling MET Calculator
Speed-adjusted MET estimation for walking, cycling, yoga & gentle movement.
For walking & cycling — rolling interpolation between standard METs.
How the Rolling MET Calculation Works
MET stands for Metabolic Equivalent of Task — a unit that describes how many times more energy an activity requires than sitting quietly at rest. By definition, 1 MET is roughly the oxygen cost of resting (about 3.5 ml of oxygen per kilogram per minute, or approximately 1 kcal per kilogram per hour). Exercise at 3 METs burns about three times your resting rate.
This calculator uses the standard formula:
The "rolling" part is what makes this tool different from a lookup chart. The Compendium of Physical Activities lists MET values only at discrete speeds — walking at 3.0 mph is 3.3 METs, and 3.5 mph is 3.8 METs. Real life happens between these points, so the calculator linearly interpolates between the two nearest reference speeds to produce a smooth, rolling MET for your exact pace. Speeds beyond the reference range are extrapolated along the same slope. Cycling between 5.5 and 19 mph works the same way. For background on the science, see the Wikipedia article on the metabolic equivalent of task.
Step-by-Step Guide
- Enter your body weight in kilograms or pounds. The quick-fill pills (60 kg, 150 lb, etc.) are handy shortcuts for common values.
- Pick your activity. For walking and cycling you'll see a speed field appear; choose mph or km/h to match your treadmill or bike computer.
- Enter your duration in minutes, or tap a preset like 30 or 45 minutes.
- Click Calculate to see your MET value, calories per minute, total calories, and MET·minutes for the session.
- Use 📋 Copy to save the summary, or Reset to clear everything and start a new calculation.
The result box also shows the formula with your numbers plugged in, so you can verify the arithmetic or adapt it for a spreadsheet.
Worked Examples
Example 1 — Recovery walk. A 70 kg person walks at 3.5 mph for 40 minutes. Walking at 3.5 mph has a standard MET of 3.8, so:
Calories per minute = 3.8 × 3.5 × 70 ÷ 200 ≈ 4.66 kcal/min
Total = 4.66 × 40 ≈ 186 kcal
Example 2 — Leisurely bike ride. A 155 lb person rides at 12 mph for 30 minutes. First convert: 155 ÷ 2.20462 ≈ 70.3 kg. Cycling at 12 mph sits right on a Compendium reference point (6.8 MET):
Calories per minute = 6.8 × 3.5 × 70.3 ÷ 200 ≈ 8.37 kcal/min
Total = 8.37 × 30 ≈ 251 kcal
Example 3 — Gentle yoga session. A 60 kg person does 45 minutes of gentle Hatha yoga (2.5 MET):
Calories per minute = 2.5 × 3.5 × 60 ÷ 200 = 2.63 kcal/min
Total = 2.63 × 45 ≈ 118 kcal
Standard MET Reference Values
The table below lists the reference values used by this calculator, drawn from the Compendium of Physical Activities. Between these points the calculator rolls smoothly.
| Activity | Pace / Intensity | MET |
|---|---|---|
| Walking | 2.0 mph (3.2 km/h) | 2.8 |
| Walking | 3.0 mph (4.8 km/h) | 3.3 |
| Walking | 3.5 mph (5.6 km/h) | 3.8 |
| Walking | 4.0 mph (6.4 km/h) | 5.0 |
| Cycling | <10 mph, leisure | 4.0 |
| Cycling | 10–12 mph | 6.8 |
| Cycling | 12–14 mph | 8.0 |
| Cycling | 14–16 mph | 10.0 |
| Gentle Hatha Yoga | — | 2.5 |
| Restorative / Yin Yoga | — | 2.0 |
| Tai Chi | general | 3.0 |
| Pilates | general | 3.0 |
| Stretching | light | 2.3 |
| Water Aerobics | light effort | 3.0 |
Factors Affecting Accuracy
MET-based estimates are population averages, not laboratory measurements. Individual results depend on many variables: age, fitness level, body composition, terrain, wind resistance, and even the shoes you wear. Walking on an incline or carrying a backpack will raise your true energy cost well above the flat-ground values used here.
The calculation also assumes the classic 3.5 ml/kg/min resting baseline. Some research suggests using 2.7 ml/kg/min as a more realistic resting value for older or sedentary adults, which would make the calorie figures slightly lower. Linear interpolation between two close reference points is a reasonable approximation, but real physiological responses are not perfectly straight lines.
For the most accurate results, use your actual moving time rather than total session time, and pick the speed that best matches your sustained pace. If you exercise on hills, a distance-based tool may suit you better — see the hiking calories per mile calculator for gradient-aware estimates, or the biking calories per 30 minutes calculator for a quick cycling benchmark.
Frequently Asked Questions
What is the difference between a rolling MET and a fixed MET?
A fixed MET treats an activity as one number (e.g., "walking = 3.3 MET"). A rolling MET adjusts continuously with your input speed, so a 2.8 mph walk and a 3.6 mph walk each get their own interpolated value instead of being lumped into the same bucket.
Can I use this calculator for yoga?
Yes. Gentle Hatha, restorative, and Yin yoga have stable, low MET values, so no speed input is needed. For a closer look at specific yoga formats, try the yin calories per km calculator.
Why does my fitness tracker show more calories?
Trackers usually report total energy expenditure, which includes your resting calories for the same period. This calculator isolates only the extra calories burned by the activity itself — a stricter and often more useful number for comparing workouts.
What if I walk faster than 4.5 mph?
Above the last reference point, the calculator extrapolates along the existing slope. However, very fast walking becomes inefficient, and jogging is a different movement pattern. For running, use a running-specific tool such as the running calories per 10 minutes calculator.