joule J
SI unit of energy. 1 N·m.
Quick convert — joule to popular units
Live converter, three directions. Type any value to update all three.
joule
kilojoule
1 J = 0.001kJ
joule
calorie
1 J = 0.239cal
joule
kilocalorie
1 J = 0.0002kcal
Conversion table — joule to every Energy unit
All values for 1 J (forward) and 1 reverse unit → {symbol}.
| To / From | 1 J = | 1 to-unit = |
|---|---|---|
| kilojoule (kJ) | 0.001 kJ | 1,000 J |
| calorie (cal) | 0.23900574 cal | 4.184 J |
| kilocalorie (kcal) | 0.00023901 kcal | 4,184 J |
| watt-hour (Wh) | 0.00027778 Wh | 3,600 J |
| kilowatt-hour (kWh) | 2.777778e-7 kWh | 3,600,000 J |
| British thermal unit (BTU) | 0.00094782 BTU | 1,055.05585262 J |
| electronvolt (eV) | 6.241509e+18 eV | 1.602177e-19 J |
| foot-pound (ft·lb) | 0.73756215 ft·lb | 1.35581795 J |
| therm (thm) | 9.478171e-9 thm | 105,505,585.262 J |
Frequently Asked Questions
What does J stand for?
joule (J) is a unit of Energy.
How many J are in 1 J?
1 J = 1 J, so 1 J = 1 J.
Is this the SI base unit?
Yes — joule is the SI base unit for Energy.
Common conversions from joule
#1
joule (J) → kilojoule (kJ)
Convert joule (J) to kilojoule.
#2joule (J) → calorie (cal)
Convert joule (J) to calorie.
#3joule (J) → kilocalorie (kcal)
Convert joule (J) to kilocalorie.
#4joule (J) → watt hour (Wh)
Convert joule (J) to watt hour.
#5joule (J) → kilowatt hour (kWh)
Convert joule (J) to kilowatt hour.
#6joule (J) → btu (BTU)
Convert joule (J) to btu.
#7joule (J) → electronvolt (eV)
Convert joule (J) to electronvolt.
#8joule (J) → foot pound (ft·lb)
Convert joule (J) to foot pound.