Energy and Work Calculator

The Energy and Work Calculator makes it easy to convert between joules (J), calories (cal), and kilowatt-hours (kWh). You can input mixed units it’ll figure them out and convert them cleanly into your chosen format. Everything runs in your browser, instantly and safely.

How to Use:

Paste or type energy values like:

100 J
500 cal
0.2 kWh

The tool supports unit suffixes, so you can mix and match lines.

Options:

• Round to 2 decimals: cleaner results
• Show original value: includes both input and converted output
• Show unit labels: adds units to each result

Choose your output mode:

• Convert all to Joules
• Convert to Calories
• Convert to Kilowatt-hours

The results update live and can be copied instantly. No page reloads, no waiting.

What Energy and Work Calculator can do:

Let’s say you’re comparing appliance usage or calorie burn. If you’ve got a list of energy readings in different units, this tool turns that mess into something clean and uniform all in seconds. Want kWh? Done. Want to see it in calories? Just toggle.

Example:

Let’s say you have a mixed list of energy values:

100 J  
500 cal  
0.2 kWh  

If your mode is set to Convert to: Joules, and both “Round to 2 decimals” and “Show original value” toggles are on, your output might look like:

100 J → 100.00 J  
500 cal → 2092.00 J  
0.2 kWh → 720000.00 J

If you switch the mode to Calories, with Show unit labels enabled and rounding off, the same inputs produce:

100 J → 23.9005736138 cal  
500 cal → 500 cal  
0.2 kWh → 172191.00 cal

And if you’re converting everything into Kilowatt-hours, the results look like this:

100 J → 0.00 kWh  
500 cal → 0.000581 kWh  
0.2 kWh → 0.20 kWh

The tool handles all major unit types and converts them intelligently no matter how they’re mixed perfect for working across joules, calories, and electricity usage data.

Energy and Work Calculator Table:

This table shows how common values compare across energy units useful for workouts, electronics, or chemistry.

Common Use Cases:

Perfect for science students, gym-goers, engineers, or anyone comparing energy values. Whether it’s for food labels, power usage, or converting old lab notes this tool keeps it simple and fast, without needing Excel or formulas.