Calories Burned Calculator

Estimate calories burned from common activities by scaling CDC reference values to your body weight and workout duration.

Last updated: 2026-03-16

Calories burned calculator

Enter your values

Estimate calories burned from common activities by scaling CDC reference values for your body weight and workout duration.

Calories Burned

Enter your activity, weight, and duration to estimate exercise calorie burn.

Calculation History (0)

No calculations yet. Complete a calculation to see it here.

Example calculations

Tap an example to prefill the calculator with sample values.

After-work walk

170 lb person walking for 45 minutes

A moderate daily movement block where calorie burn is meaningful but not extreme.

Result: A few hundred calories burned at moderate intensity

Lap swim session

72 kg swimmer doing 30 minutes of slow laps

A shorter vigorous session with a much higher burn rate per minute.

Result: A vigorous half-hour with a stronger calorie burn

Weekend run

185 lb runner jogging for 60 minutes

A classic steady run where body weight meaningfully changes the burn estimate.

Result: A higher hourly burn driven by both pace and body mass

What this estimate is based on

The calculator starts with CDC calorie-burn reference values for a 154-pound adult and scales them to the body weight you enter. That keeps the output simple, explainable, and useful for quick comparisons across activities.

It is still only an estimate. Pace, hills, rest periods, movement quality, and personal efficiency can all pull the real burn away from the reference table in either direction.

Calories burned calculator FAQs

How to use a quick activity estimate without treating it like an exact lab measurement.

How accurate are activity calorie estimates?

They are directionally useful, not lab-accurate. Two people doing the same activity can burn different amounts because pace, efficiency, fitness, terrain, and body composition all matter.

Why does body weight change the result?

Heavier bodies generally require more energy to move through the same activity. This calculator scales a reference activity table to your body weight so the estimate is more personalized.

Should I eat back every calorie this shows?

Not automatically. Workout calories are estimates and can be over-read easily. If you are using the output for nutrition planning, it is usually better to treat it as a range than a perfect target.

Layer hydration or endurance planning on top of the activity estimate.

Water Intake Calculator

Estimate hydration needs around your session length and conditions.

VO2 Max Calculator

Pair activity output with an endurance-specific training estimate.

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Disclaimer

This calculator is for general fitness use only. It does not estimate medical energy needs or replace guidance from a clinician, coach, or sports dietitian.

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Iframe embed code

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