What are MET values and where do they come from?

MET (Metabolic Equivalent of Task) values quantify the energy cost of physical activities as multiples of resting metabolic rate. One MET equals 3.5 mL of oxygen per kilogram of body weight per minute. The Compendium of Physical Activities, maintained by researchers at Arizona State University and published in Medicine & Science in Sports & Exercise, provides standardized MET values derived from laboratory measurements and field studies.

Why do two activities with the same MET value show identical calorie estimates?

MET values represent intensity relative to resting metabolism. When two activities share the same MET rating, they require the same relative metabolic demand per unit of body weight per unit of time, resulting in identical calorie estimates for a given weight and duration. Differences in perceived effort often reflect neuromuscular coordination, skill requirements, or local muscle fatigue rather than total energy expenditure.

How does body weight affect the accuracy of these estimates?

The MET formula assumes energy cost scales linearly with body mass, which is most accurate for weight-bearing activities and individuals with typical body composition. For very muscular individuals or those with higher adiposity, actual energy expenditure may differ because muscle tissue has higher metabolic activity than adipose tissue. Non-weight-bearing activities like cycling show less sensitivity to these composition differences.

Do these estimates account for fitness level or training status?

Standard MET values reflect population averages and do not adjust for individual fitness or movement economy. Trained individuals often expend fewer calories performing the same activity at the same absolute intensity due to improved biomechanical efficiency and technique. However, trained individuals typically exercise at higher absolute intensities, potentially offsetting this efficiency gain during actual training sessions.

Can this tool be used to plan calorie deficits for weight management?

The calculator provides estimates of exercise energy expenditure only. Weight management involves total daily energy expenditure (including basal metabolic rate, thermic effect of food, and non-exercise activity), energy intake, and individual metabolic adaptations. Exercise calorie estimates represent one component of energy balance and should be considered alongside other factors when evaluating overall energy needs.

Energy Expenditure

Activity Calorie Comparison Calculator

Compare estimated calorie burn across running, cycling, swimming, walking, and resistance training.

Last updated: 22 April 2026

What this tool does

This calculator compares estimated calorie expenditure across six common activities—walking, running, cycling, swimming, weight training, and rowing—using published MET (Metabolic Equivalent of Task) values from the Compendium of Physical Activities. It applies body weight and exercise duration to the standard MET formula (Calories = MET × kg × 3.5 / 200 × minutes) and displays side-by-side calorie burn estimates for each activity. Results represent population-average energy expenditure and do not account for individual fitness level, terrain, or exercise technique.

Inputs

Result

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Formula Used

Calories = MET \times w \times \frac{t}{60}

w

Weight in kg

t

Duration in minutes

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How Activity Calorie Comparison Calculator works

This tool estimates energy expenditure across multiple common activities for a person of a given weight over a specified duration. By applying standard MET (Metabolic Equivalent of Task) values to body weight and time, the calculator produces side-by-side calorie estimates for running, cycling, swimming, walking, weightlifting, and other exercises. Each activity's MET value represents its intensity relative to resting metabolic rate, enabling direct comparison of calorie burn between different forms of exercise under identical conditions.

The formula

Energy expenditure for each activity is calculated using:
Calories = (MET × weight_kg × 3.5 / 200) × minutes
where MET is the metabolic equivalent for the activity, weight_kg is body mass in kilograms, and minutes is the duration. MET values used include: running (8.0 mph) = 11.5, cycling (moderate) = 8.0, swimming (moderate freestyle) = 8.0, walking (3.5 mph) = 4.3, and weightlifting (vigorous) = 6.0. The constant 3.5 represents baseline oxygen consumption in mL/kg/min, and dividing by 200 converts the equation to kilocalories per minute.

Where this method is most accurate

MET-based estimates perform best for steady-state aerobic activities performed at consistent intensities by adults with typical body composition. The method assumes a linear relationship between body weight and energy cost, which holds well for weight-bearing activities like running and walking. Accuracy decreases for individuals with very high or low muscle mass relative to total weight, for interval-based or variable-intensity exercise, and for activities requiring significant skill or equipment efficiency. Environmental factors such as terrain, wind, water temperature, and altitude are not accounted for in standard MET calculations.

What this tool does not do

This calculator does not measure individual metabolic rate, account for fitness level or movement economy, or track cumulative energy balance. It does not provide training advice, recommend specific activities for weight management goals, or assess cardiovascular fitness. The tool does not adjust for the thermic effect of food, non-exercise activity thermogenesis (NEAT), or changes in resting metabolic rate. Results are population-based estimates and do not replace individualized assessment by sports scientists or exercise physiologists.

Disclaimer

This tool is for educational and informational purposes only. It is not medical, diagnostic, or prescriptive advice. Consult a qualified healthcare or fitness professional before beginning any exercise program or making decisions based on calculator output. All values are estimates derived from published population data and may not reflect individual variation.

Questions

What are MET values and where do they come from?: MET (Metabolic Equivalent of Task) values quantify the energy cost of physical activities as multiples of resting metabolic rate. One MET equals 3.5 mL of oxygen per kilogram of body weight per minute. The Compendium of Physical Activities, maintained by researchers at Arizona State University and published in Medicine & Science in Sports & Exercise, provides standardized MET values derived from laboratory measurements and field studies.
Why do two activities with the same MET value show identical calorie estimates?: MET values represent intensity relative to resting metabolism. When two activities share the same MET rating, they require the same relative metabolic demand per unit of body weight per unit of time, resulting in identical calorie estimates for a given weight and duration. Differences in perceived effort often reflect neuromuscular coordination, skill requirements, or local muscle fatigue rather than total energy expenditure.
How does body weight affect the accuracy of these estimates?: The MET formula assumes energy cost scales linearly with body mass, which is most accurate for weight-bearing activities and individuals with typical body composition. For very muscular individuals or those with higher adiposity, actual energy expenditure may differ because muscle tissue has higher metabolic activity than adipose tissue. Non-weight-bearing activities like cycling show less sensitivity to these composition differences.
Do these estimates account for fitness level or training status?: Standard MET values reflect population averages and do not adjust for individual fitness or movement economy. Trained individuals often expend fewer calories performing the same activity at the same absolute intensity due to improved biomechanical efficiency and technique. However, trained individuals typically exercise at higher absolute intensities, potentially offsetting this efficiency gain during actual training sessions.
Can this tool be used to plan calorie deficits for weight management?: The calculator provides estimates of exercise energy expenditure only. Weight management involves total daily energy expenditure (including basal metabolic rate, thermic effect of food, and non-exercise activity), energy intake, and individual metabolic adaptations. Exercise calorie estimates represent one component of energy balance and should be considered alongside other factors when evaluating overall energy needs.

Sources & Methodology

Applies published MET (Metabolic Equivalent of Task) values from the Compendium of Physical Activities to body weight and duration using the formula: Calories = (MET × kg × 3.5 / 200) × minutes. MET values represent activity intensity as multiples of resting metabolic rate.

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