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Convert between joules, calories, kilowatt-hours, BTU, electron volts, and more with batch values for quick checks.
What this tool helps you answer
Use this page to convert energy values between units used in physics, nutrition, electricity, and engineering.
The output shows the primary conversion and a reference table with the value in all supported units.
converted = value * factor (or temperature transform)Next step
Convert between joules, calories, kilowatt-hours, BTU, electron volts, and more with batch values for quick checks.
Editorial review
This page combines the live tool, input guidance, worked examples, and operating limits so Energy Converter stays useful even before users interact with the calculator.
Reviewed by Klartext Tools against the current Energy Converter workflow on 2026-03-01.
Last updated:
Use with judgment
Page scope
Use this page to convert energy values between units used in physics, nutrition, electricity, and engineering.
Review the output with Energy value set to 10, then compare it with the method and limitations on this page before changing other inputs.
Change From unit to kwh while keeping the rest of the Energy Converter scenario stable.
If the result moves sharply after changing From unit, treat the tool output as sensitive and validate the source input before acting.
Enter an energy value, pick source and target units, and review the result.
Enter the energy value to convert.
Select the source unit (e.g. kWh) and the target unit (e.g. BTU).
Review the converted result and the all-units reference table.
Optionally paste multiple values into batch input for bulk conversion.
Use this page to convert energy values between units used in physics, nutrition, electricity, and engineering.
Sample inputs
Sample outcome: Review the output with Energy value set to 10, then compare it with the method and limitations on this page before changing other inputs.
Change From unit to kwh while keeping the rest of the Energy Converter scenario stable.
Sample inputs
Sample outcome: If the result moves sharply after changing From unit, treat the tool output as sensitive and validate the source input before acting.
Energy is measured in different units depending on the context: physics uses joules, nutrition uses kilocalories (often just called calories), electricity uses kilowatt-hours, and HVAC engineering uses BTU. Comparing energy costs, food labels, and physics problems across these domains requires accurate conversion. This tool handles all common energy units and shows equivalents at a glance.
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