Calories Burned

How to use Calories Burned

1. Open Calories Burned in your browser — it loads instantly and works offline once cached.
2. Enter your values in the input fields. Every field is labelled so you know exactly what to type.
3. The result updates automatically as you type — there is no "submit" round-trip to a server.
4. Adjust any input to compare scenarios and see how the outcome changes in real time.
5. Copy or note the result. Nothing you enter is stored or sent anywhere.

Why use Calories Burned?

• 100% free with no limits, no sign-up and no watermarks.
• Private by design — your data are processed in your browser and never uploaded to a server.
• Fast and lightweight, with instant results even on a phone or a slow connection.
• Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
• Part of a full health & fitness suite, so related calories burned tasks are one click away.

What people use Calories Burned for

• Estimating energy expenditure for a workout or an activity.
• Comparing the relative cost of different exercises.
• Adding activity into a daily calorie plan.

Calories Burned: limits and things worth knowing

• Estimates use MET values — multiples of resting metabolic rate — scaled by body weight and duration. A heavier person burns more for the same activity.
• MET tables are population averages and take no account of fitness, efficiency or terrain. Individual variation is large.
• Fitness trackers and gym machines routinely overestimate, sometimes by 20-50%, and machines that do not know your weight are guessing entirely.
• Part of the figure is energy you would have spent anyway at rest. The net additional burn is lower than the gross number shown.
• General information only, not a prescription for training or diet.

Is it private and secure?

Your privacy is built in. Calories Burned runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.

Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.

You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.

Learn more

Why Browser-Based Tools Are Safer for Your Files — Most online converters upload your files to a server. Client-side tools don't. Here's why that difference matters for privacy.