Planks are a staple of gentle core training, but how many calories do they actually burn? This calculator estimates the calories you burn during a plank session at light intensity, using your body weight, the duration of your hold, and your age. It's designed for anyone who prefers low-impact, isometric exercise — from beginners building core stability to those recovering from injury or simply adding a gentle finisher to their routine.
Unlike dynamic exercises, planks keep your muscles engaged without joint impact, making them a safe choice for daily practice. The estimate is based on the metabolic equivalent of task (MET) value for light-intensity calisthenics, adjusted for your personal factors. Use the result to track your effort, plan your workouts, or compare plank sessions with other gentle activities like walking or yoga.
Simply enter your details, hit calculate, and you'll get a clear breakdown of calories burned per session and per minute — plus a step-by-step explanation of the math behind it.
🧮 Plank Calories (Light Intensity)
How to Use This Tool
Using the plank calories calculator is straightforward. Enter your body weight, choose the unit (kg or lb), then specify how long you held the plank — either in minutes or seconds. Add your age to refine the estimate, then click Calculate. The result shows total calories burned for the session and the rate per minute. You can also use the quick-fill buttons to load common examples and see how the numbers change.
For the most accurate estimate, use your current weight and the actual time you spent in the plank position, excluding rest breaks. If you do multiple sets, add up the total time and enter that combined duration.
How It Works
This calculator uses the metabolic equivalent of task (MET) method, a standard approach in exercise science. A MET value represents the energy cost of an activity relative to resting metabolism. For light-intensity calisthenics like a gentle plank hold, we use a MET of 2.8. The formula is:
Calories per minute = MET × 3.5 × weight (kg) / 200
Then multiply by the duration in minutes to get total calories. The constant 3.5 represents the oxygen consumption (in ml/kg/min) at rest, and 200 converts the result into kilocalories. This method is widely used in fitness tracking and is consistent with the MET concept.
Age is included as a minor adjustment factor, reflecting that metabolic rate tends to decline slightly with age. The effect is small but helps personalize the estimate.
Worked Examples
Example 1: A 70 kg person holds a plank for 10 minutes. Calories = 2.8 × 3.5 × 70 / 200 × 10 = 34.3 kcal. That's about 3.4 kcal per minute.
Example 2: A 55 kg person does three 1-minute planks (total 3 minutes). Calories = 2.8 × 3.5 × 55 / 200 × 3 = 8.1 kcal. A short session, but it adds up over a week.
Example 3: A 90 kg person holds a plank for 15 minutes. Calories = 2.8 × 3.5 × 90 / 200 × 15 = 66.2 kcal. Heavier individuals burn more because more energy is required to support their body mass.
Tips & Best Practices
- Maintain proper form: keep your body in a straight line from head to heels, engage your core, and avoid sagging hips.
- Start with shorter holds (20–30 seconds) and gradually increase duration to avoid strain.
- Combine planks with other gentle movements like walking or yoga for a balanced routine. You might also explore our walking calorie calculator for comparison.
- Use a timer to track your actual hold time accurately.
- Remember that calorie burn from isometric exercises is modest; focus on consistency and overall activity.
Factors Affecting Accuracy
The MET value of 2.8 is an average for light-intensity calisthenics. Your actual burn can vary based on:
- Intensity: A harder plank with more muscle engagement burns more calories.
- Body composition: Muscle mass increases metabolic rate.
- Form: Proper alignment ensures you're working the intended muscles.
- Individual metabolism: Genetics and fitness level play a role.
This estimate is a useful guideline, not a precise measurement. For exact numbers, you'd need laboratory equipment like indirect calorimetry.
Frequently Asked Questions
How many calories does a 1-minute plank burn?
For a 70 kg person, a 1-minute plank at light intensity burns about 3.4 kcal. That's roughly 0.05 kcal per kilogram per minute.
Is plank a good exercise for weight loss?
Planks are excellent for core strength and stability, but they burn relatively few calories compared to dynamic exercises. For weight loss, combine planks with aerobic activities like brisk walking or cycling.
Can I use this calculator for other isometric exercises?
The MET value is specific to light calisthenics. For wall sits or static holds, the values may differ slightly, but this calculator gives a reasonable approximation.
Why does age matter?
Metabolic rate typically decreases with age, so the calculator adjusts the estimate slightly downward for older individuals. The effect is small but helps personalize the result.
Additional Resources
For more on exercise energy expenditure, see the MET Wikipedia page and the CDC's guide to measuring physical activity. If you're interested in other gentle exercises, try our yoga calorie calculator or walking calorie calculator.