Energy Converter
Convert between all common energy units instantly. Select your units from the dropdowns below and enter a value to see the conversion in real-time.
SI unit: joule (J)
Conversion Formula
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About Energy Units
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Common Energy Conversions
- 1 J = 0.23901 cal = 9.4782 × 10-4 BTU = 2.7778 × 10-7 kWh
- 1 cal = 4.184 J = 3.9683 × 10-3 BTU = 1.163 × 10-3 Wh
- 1 kcal = 4,184 J = 4.184 kJ = 1,000 cal = 3.968 BTU = 1.163 Wh
- 1 BTU = 1,055.06 J = 252.16 cal = 0.29307 Wh = 1.0551 × 10-5 thm
- 1 kJ = 1,000 J = 239.0 cal = 0.9478 BTU = 0.27778 Wh
- 1 Wh = 3,600 J = 860.4 cal = 3.412 BTU = 0.001 kWh
- 1 kWh = 3.6 MJ = 3,600 kJ = 3,412.1 BTU = 859.85 kcal
- 1 MJ = 1,000 kJ = 238.85 kcal = 0.27778 kWh = 947.8 BTU
- 1 thm = 100,000 BTU = 105.506 MJ = 29.307 kWh = 25,200 kcal
- 1 ft·lbf = 1.35582 J = 0.32405 cal = 1.2851 × 10-3 BTU
- 1 eV = 1.60218 × 10-19 J = 1.60218 × 10-22 kJ
- 1 erg = 10-7 J = 100 nJ = 2.3901 × 10-8 cal
- 1 t(TNT) = 4.184 GJ = 1,162.8 kWh = 109 cal
- 1 GJ = 277.78 kWh = 238.85 Mcal = 9.4782 therms