MyKit.tools

Energy Converter

Convert between joules, calories, kcal, kWh, BTU and electronvolts with real-world energy references

All Conversions

J

4184.000

cal

1000.001

kcal

1.000

kWh

0.001

BTU

3.966

eV

2.61e+22

Common Energy References

Energy in 1 food calorie (kcal)

4.18e+3 J

Energy in 1 kWh

8.40e+6 J

Energy in 1 BTU

1.06e+3 J

Daily diet (2000 kcal)

7.50e+6 J

Energy to boil 1L of water

2.26e+6 J

Kinetic energy of 1-tonne car at 100 km/h

3.60e+6 J

Energy in 1 ton of TNT

4.18e+9 J

Energy Units

  • J (joule): SI unit of energy
  • cal/kcal: calories (food energy, 1 food calorie = 1 kcal)
  • kWh: kilowatt-hour (electricity billing)
  • BTU: British Thermal Unit (heating/cooling)
  • eV: electron volt (particle physics)

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