Joule - Conversions

Conversions

1 joule is equal to:

• 1×107 ergs (exactly)
• 6.24150974×1018 eV (electronvolts)
• 0.2390 cal (thermochemical gram calories or small calories)
• 2.3901×10−4 kcal (thermochemical kilocalories, kilogram calories, large calories or food calories)
• 9.4782×10−4 BTU (British thermal unit)
• 0.7376 ft·lbf (foot-pounds force)
• 23.7 ft·pdl (foot-poundals)
• 2.7778×10−7 kilowatt-hour
• 2.7778×10−4 watt-hour
• 9.8692×10−3 litre-atmosphere
• 11.1265 femtograms (mass-energy equivalence)
• 1×10−44 foe (exactly)

Units defined exactly in terms of the joule include:

• 1 thermochemical calorie = 4.184 J
• 1 International Table calorie = 4.1868 J
• 1 watt hour = 3600 J
• 1 kilowatt hour = 3.6×106 J (or 3.6 MJ)
• 1 watt second = 1 J
• 1 ton TNT = 4.184 GJ