Energy Converter
Energy conversion workspace
Enter a decimal, fraction or quick calculation — for example 12.5, 3/8 or (12*4)+6.5.
Batch conversionconvert up to 100 values at once
No values yet.
Compare all energy units
One input, every supported equivalent. Select any row as the main target.
| Unit | Equivalent | Target action |
|---|---|---|
| Joules J | 1 | SourceSource |
| Kilowatt Hours kWh | 2.78E-7 | TargetSelected |
| Kilojoules kJ | 1E-3 | |
| Calorie (thermochemical) cal | 0.24 | |
| Kilocalorie (food Calorie) kcal | 2.39E-4 | |
| BTU (International Table) BTU | 9.48E-4 |
Energy measures the capacity to perform work.
Sourced factorsFormula
value in target = value × source factor / target factor
Calculations use the central unit catalog and preserve precision until the result is formatted.
Common conversions
| Input | From | To | Result |
|---|---|---|---|
| 1 | Kilowatt Hours | Joules | 3,600,000 |
Frequently asked questions
What is the difference between a calorie and a food Calorie?
One thermochemical calorie equals 4.184 joules. One food Calorie is a kilocalorie: 1,000 thermochemical calories, or 4,184 joules.
Are the results rounded?
The calculation retains full JavaScript number precision; the precision control only formats the displayed result.
Accuracy & transparency
Sources & methodology
Calculations keep full numeric precision until display formatting. These references describe the definitions, variants or factors used; links do not imply affiliation.
SI definitions and published coefficients for selected non-SI units.
Reference factors and named variants for commonly used units, including US liquid cooking measures and British stone.
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