Strength training is about more than building muscle — it also burns a meaningful number of calories. The Strength MET Calculator helps you estimate the energy cost of your resistance workouts by converting your body weight, workout duration, and exercise intensity into a clear calorie figure. Whether you're lifting heavy, doing bodyweight circuits, or using resistance bands, this tool gives you a practical estimate based on the metabolic equivalent of task (MET) values published in the Compendium of Physical Activities.
Simply enter your weight, choose your preferred unit, pick an intensity level that matches your session, and set the duration. The calculator will show your estimated calories burned, plus a breakdown of the MET value used and the math behind the result. It's ideal for anyone tracking fitness progress, planning nutrition, or simply curious about how much energy a strength session demands.
Use the quick-fill buttons to load common scenarios, then adjust the sliders to match your exact workout. The tool is designed for general guidance — individual results vary with effort, form, and metabolism.
💪 Strength Workout Calorie Estimator
How to Use This Tool
Using the Strength MET Calculator is straightforward. Start by entering your body weight in kilograms or pounds — the calculator converts automatically. Next, set the duration of your strength session, either in minutes or hours. Then choose an intensity level that best matches your workout: Light (e.g., light resistance, slow reps, low effort), Moderate (e.g., circuit training, moderate effort, typical gym session), or Vigorous (e.g., heavy lifting, high-intensity interval resistance training).
Click Calculate to see your estimated calorie burn. The result area also shows the MET value used and the step-by-step math, so you can understand exactly how the number was derived. Use the quick-fill buttons to load common scenarios, then tweak the values to match your own workout. The Reset button clears all fields and results.
How It Works
The calculator uses the concept of Metabolic Equivalent of Task (MET), a standard unit that estimates the energy cost of physical activities. One MET is roughly the energy you burn at rest — about 1 kcal per kilogram of body weight per hour. When you exercise, your body burns multiple times that baseline rate.
The formula is simple:
Calories burned = MET value × body weight (kg) × duration (hours)
For strength training, the Compendium of Physical Activities assigns MET values based on intensity. This calculator uses the following values:
- Light strength training — MET 3.0
- Moderate strength training — MET 5.0
- Vigorous strength training — MET 6.0
These values are widely used in fitness research and calorie-tracking apps. Note that the actual MET for a given individual can vary with effort, rest periods, and exercise selection.
Worked Examples
Example 1: A 70 kg person does 45 minutes of moderate strength training.
MET = 5.0, weight = 70 kg, duration = 0.75 hours.
Calories = 5.0 × 70 × 0.75 = 262.5 kcal.
Example 2: A 155 lb person does 30 minutes of vigorous strength training.
First convert weight: 155 lb ÷ 2.20462 = 70.3 kg.
Duration = 0.5 hours, MET = 6.0.
Calories = 6.0 × 70.3 × 0.5 = 210.9 kcal.
Example 3: A 60 kg person does 1 hour of light strength training.
MET = 3.0, weight = 60 kg, duration = 1 hour.
Calories = 3.0 × 60 × 1 = 180 kcal.
Tips & Best Practices
- Be honest about intensity. If you're unsure, choose moderate — it's the most common for general strength sessions.
- Track your workouts. Logging duration and perceived effort helps you refine your estimates over time.
- Combine with other tools. For a full picture of your daily energy expenditure, pair this with a walking or cycling calorie calculator.
- Remember the afterburn. Strength training can elevate your metabolism for hours after the session, so the actual total burn may be slightly higher than the estimate.
Factors Affecting Accuracy
Several factors can make your actual calorie burn differ from the estimate:
- Effort level: Lifting heavier or moving faster increases MET.
- Rest periods: Long rests lower the average intensity.
- Exercise selection: Compound movements (squats, deadlifts) burn more than isolation exercises.
- Body composition: Muscle mass increases resting metabolic rate.
- Genetics and hormones: Individual variation is normal.
Use this calculator as a planning tool, not a precise measurement. For weight management, focus on consistency and overall activity rather than exact numbers.
Frequently Asked Questions
Q: Can I use this for bodyweight exercises like push-ups and squats?
A: Yes, the moderate and vigorous settings work well for bodyweight circuits. For a more specific estimate, try our bodyweight calorie calculator.
Q: How does strength training compare to cardio for calorie burn?
A: During the session, cardio often burns more calories per minute. However, strength training builds muscle, which increases your resting metabolism and can lead to greater overall calorie burn over time.
Q: What is the MET value for yoga or gentle movement?
A: Yoga typically ranges from MET 2.5 to 4.0 depending on style. For a dedicated estimate, see our mobility MET calculator.
Q: Why does the calculator ask for weight in kg?
A: The MET formula uses kilograms. The calculator converts pounds automatically, so you don't need to do the math yourself.
Additional Resources
For more detailed MET values and research, consult the Compendium of Physical Activities — the standard reference used by researchers and fitness professionals. You can also explore the CDC's guide to measuring physical activity for practical tips on tracking your exercise.