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Energy Converter

Convert between joules, kWh, calories, BTU, and more.

🔬 SI (Joules)

Joules(J)

3,600,000

Kilojoules(kJ)

3,600

Megajoules(MJ)

3.6

Gigajoules(GJ)

0.0036

⚡ Electrical

Watt-hours(Wh)

1,000

Kilowatt-hours(kWh)

1

Megawatt-hours(MWh)

0.001

🍎 Nutrition

Calories (small)(cal)

860,420.6501

Kilocalories(kcal)

860.421

🇺🇸 Imperial

BTU(BTU)

3,412.1282

Therms(therm)

0.0341296

Foot-pounds(ft·lb)

2,655,219.7194

⚛️ Physics

Electronvolts(eV)

2.24694e+25

Kiloelectronvolts(keV)

2.24694e+22

Common Reference Points

1 kcal4,184 J

1 kWh3,600 kJ

1 BTU1,055 J

1 apple (~80 kcal)335 kJ

1 kWh3,412 BTU

1 therm29.3 kWh