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Energy Converter

Convert one energy value between common SI, thermal, and electrical energy units with documented reference factors.

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Uses exact SI and standard reference factors. Results are approximate for calories and BTU definitions. Calculated locally; nothing is uploaded.

Result:

A QUICK WALKTHROUGH

How to use this tool

  1. Enter a finite value and choose its source unit.
  2. Choose the destination unit.
  3. Select Convert to read the result.

Units and limits

J = 1, kJ = 1,000 J, cal = 4.184 J, kcal = 4,184 J, Wh = 3,600 J, kWh = 3,600,000 J, and BTU = 1,055.05585262 J. Calorie and BTU conventions vary, so those results are reference approximations.

Local processing

Conversion runs in your browser. Values are not uploaded or saved.

GOOD TO KNOW

Common questions

Are calorie and BTU results exact?

They use the listed reference factors. Different calorie and BTU conventions exist, so treat those conversions as approximations.

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