Energy Converter
Convert joules, calories, kilocalories and kilowatt-hours.
Your inputs
Your inputs and files stay on your device.
Your result
A little input. A useful answer.
Enter your values and run the tool to see your result here.
How to use this tool
- Enter a value.
- Choose units.
- Copy result.
About Energy Converter
Convert joules, calories, kilocalories and kilowatt-hours.
Does this tool send my data anywhere?
No. Its calculation or transformation happens on your device.
Using Energy Converter with the right inputs
Convert joules, calories, kilocalories and kilowatt-hours. Start by matching your task to the quantities and options shown below. The definitions of the inputs matter as much as the final number or transformed output; retain the original values so that you can repeat or check the result.
Inputs and options explained
- Value: Enter the numeric value for this quantity using the units or scale shown in the label.
- From: choose Joules (J), Calories (cal), Kilocalories (kcal), Kilowatt-hours (kWh).
- To: choose Joules (J), Calories (cal), Kilocalories (kcal), Kilowatt-hours (kWh).
Example to try in this tool
Use the following sample values to see how the controls and result fit together. They are an illustration of the operation, not recommended values for your own situation.
- Value: 100
- From: Joules (J)
- To: Joules (J)
Select Convert energy. The result begins with:
Converted energy
100
This example records the tool’s output for those inputs. Check the method and assumptions against your own task before using a result; reproducing an example is not independent certification of the underlying model.
Interpretation and limitations
Match the units and operating conditions to the calculation. Rated values and measured values can describe different situations, and a simplified formula may not cover every device or circuit. Use manufacturer specifications and qualified review for installation or safety decisions.
Can I use the result to approve an installation?
No. A numerical estimate does not check all equipment ratings, protective devices or applicable requirements. Confirm the design and installation with an appropriately qualified professional.
Before you use the output
- Choose the intended action: Convert energy. Re-run the operation after changing an input or mode so that you are checking the updated result.
- Read the result label and any accompanying explanation. Keep the input values or source file with the output so that a later comparison uses the same assumptions.
- If a result looks unexpected, check units, separators and selected options first. Try a smaller example you can verify rather than repeatedly changing several settings at once.
Questions or a result that needs checking?
If you find a discrepancy, report a problem with Energy Converter. Include a non-sensitive example, the selected options, the result you expected and the result shown. This makes the issue easier to reproduce. See About & privacy for how the site handles tool inputs.