Printable chart
Energy Conversion Chart
Printable energy conversion chart for joules, calories, BTU, watt-hours and kilowatt-hours. Print this table or use the API and calculators for custom decimal precision.
Energy
Core conversion table
| Input | Equivalent | Unit pair |
|---|---|---|
| 100 joules | 23.9005736138 calories | j -> cal |
| 1 kilojoules | 0.947817120313 BTU | kj -> btu |
| 1 BTU | 1.05505585262 kilojoules | btu -> kj |
| 1 watt-hours | 3.6 kilojoules | wh -> kj |
| 1 kilowatt-hours | 3600000 joules | kwh -> j |
| 1 kilocalories | 4.184 kilojoules | kcal -> kj |
Guide & details
How to use this chart
Use the table for quick checks, classroom handouts and desk references. For values not shown here, open the converter or call the API with your own value, from unit and to unit.
Best uses for this chart
The Energy Conversion Chart is built as a quick reference after the table, so the printable conversion values stay first and the explanatory content stays below the core task.
- Convematik uses deterministic conversion factors from the local conversion engine and keeps full precision internally.
- Displayed values are rounded for readability, so copy the API response when you need machine-readable precision.
Chart accuracy notes
- Convematik uses deterministic conversion factors from the local conversion engine and keeps full precision internally.
- Displayed values are rounded for readability, so copy the API response when you need machine-readable precision.
Common chart mistakes
- Convematik uses deterministic conversion factors from the local conversion engine and keeps full precision internally.
- Displayed values are rounded for readability, so copy the API response when you need machine-readable precision.
Next steps from this reference
- Open the full converter for values not shown in the table.
- Use a focused tool page when you need formula, examples and API parameters.
- Print the chart only after confirming the category matches your task.