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Calories Burned

100% Free

Estimate calories burned for any activity — running, cycling, swimming, yoga, gym — from your weight and workout time.

MET-Based
Informational
100% Client-Side
No Tracking
Informational only — not medical or fitness advice. Estimates use published MET values, which are population averages. Your actual burn varies with intensity and fitness.

Activity & details

Choose activity

Calories burned

360kcal
Running · 30 min · MET 9.8
Per minute
12 kcal
Per hour
720 kcal

This is a rough estimate from average MET values. Your real burn depends on intensity, fitness, and body composition.

Uses the ACSM MET formula. Runs entirely in your browser — nothing you enter is uploaded.

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How to Use

  1. 1 Enter your body weight in kilograms
  2. 2 Enter how long the activity lasted, in minutes
  3. 3 Tap the activity that matches your workout
  4. 4 Read the estimated calories burned
  5. 5 Check the per-minute and per-hour rates to compare workouts

Features

  • Twelve common activities with published MET values
  • Uses the ACSM MET formula for the calorie estimate
  • Shows total, per-minute, and per-hour calorie rates
  • Scales correctly with body weight and duration
  • Allows a custom MET value for activities not listed
  • Runs entirely in your browser — nothing about you is uploaded

Why it Matters

Knowing roughly how many calories an activity burns helps you compare workouts, plan around an energy goal, and stay motivated. Because heavier bodies and longer sessions burn more, a personalised estimate from your own weight and time is far more useful than a generic chart. It pairs naturally with a daily calorie target to give a fuller picture of your energy balance.

★★★★★

Use Cases

Compare Workouts

See how running stacks up against cycling or swimming for the same time

Plan Energy Balance

Add your workout burn on top of your daily maintenance calories

Set Session Goals

Aim for a calorie target in a workout and find how long it takes

Understand METs

Learn how a single number captures the intensity of an activity

ℹ️ Informational only — not medical or fitness advice. Estimates use population-average MET values and can’t account for your individual intensity or fitness. Use them as a rough guide.

What this tool does

The Calories Burned calculator estimates the energy you use during an activity from your body weight, how long you exercised, and what you did. Pick from twelve common activities — or enter a custom MET — and see the total calories plus per-minute and per-hour rates.

How it works

Each activity has a published MET (Metabolic Equivalent of Task) value that captures its intensity. The estimate uses the ACSM formula, calories/min = MET × 3.5 × weight(kg) ÷ 200, multiplied by your duration. Because your own weight drives the result, the number is personalised rather than generic.

Privacy

Everything runs in your browser via the pure calculateCaloriesBurned function. Nothing you enter is uploaded or stored — you can verify this in your browser’s Network tab.

Frequently Asked Questions

What is a MET?
MET stands for Metabolic Equivalent of Task. One MET is the energy you use sitting quietly. An activity rated at 8 METs uses about eight times that much energy. MET values come from published research and let one number summarise an activity's intensity.
How is the calorie estimate calculated?
It uses the ACSM formula: calories per minute = MET × 3.5 × your weight in kg ÷ 200, multiplied by your duration. Heavier bodies and longer or more intense activities all increase the total.
Why do heavier people burn more?
Moving more mass takes more energy, so for the same activity and time, a heavier person burns more calories. That's why entering your own weight gives a much better estimate than a generic figure.
My activity isn't listed — what can I do?
You can supply a custom MET value. Look up the MET for your activity in a public compendium of physical activities and enter it directly for a tailored estimate.
Is this medical or fitness advice?
No. These are estimates from population-average MET values and can't account for your individual intensity, fitness, or body composition. Use them as a rough guide, not a precise measurement, and consult a professional for personalised guidance.
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Want to understand the math?

Browse all guides →
MET Values and How Calories Bu
met

MET Values and How Calories Burned Are Estimated

What a MET is, the formula behind calories-burned estimates, why weight and intensity matter, and how accurate these numbers really are.

23 Jun 2026

5 min read

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