Energy Converter
Unit converter
Energy Converter
Convert between 23 energy units instantly. Select your units from the Builder tab or type a conversion like "100 cm to inches" in the AI input. Every conversion shows the full step-by-step calculation.
This converter covers all standard energy units including metric and imperial systems. Use the reference table below to see how each unit relates to the base unit (joule).
Complete list of Joules Energy conversions
Joules to BTU (thermochemical)
Joules to BTU
Joules to Calories
Joules to Electronvolts
Joules to Erg
Joules to Foot-pound
Joules to Gigajoule
Joules to Hartree
Joules to Horsepower-Hour
Joules to kcal
Joules to Kilojoules
Joules to kWh
Joules to Megajoule
Joules to Megawatt-hour
Joules to Quad
Joules to Rydberg
Joules to Therm
Joules to Ton of Coal Equivalent
Joules to Ton of Oil Equivalent
Joules to Ton of TNT
Joules to Watt-Second
Joules to Watt-hour
Energy units reference
| Unit | Symbol | joule |
|---|---|---|
| BTU (thermochemical) | BTU(th) | 1054.35 |
| British Thermal Unit | BTU | 1055.06 |
| Calorie | cal | 4.184 |
| Electronvolt | eV | 1.602 × 10⁻¹⁹ |
| Erg | erg | 1 × 10⁻⁷ |
| Foot-pound | ft·lb | 1.35582 |
| Gigajoule | GJ | 1000000000 |
| Hartree | Eₕ | 4.36 × 10⁻¹⁸ |
| Horsepower-Hour | hp·h | 2684520 |
| Joule | J | 1 |
| Kilocalorie | kcal | 4184 |
| Kilojoule | kJ | 1000 |
| Kilowatt-hour | kWh | 3600000 |
| Megajoule | MJ | 1000000 |
| Megawatt-hour | MWh | 3600000000 |
| Quad | quad | 1.055 × 10¹⁸ |
| Rydberg | Ry | 2.18 × 10⁻¹⁸ |
| Therm | thm | 1.055 × 10⁸ |
| Ton of Coal Equivalent | tce | 29307600000 |
| Ton of Oil Equivalent | toe | 41868000000 |
| Ton of TNT | tTNT | 4184000000 |
| Watt-Second | W·s | 1 |
| Watt-hour | Wh | 3600 |
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