Enter Value

Conversion Results

1000.00

1.00000

0.00100000

0.277778

kWh

0.000277778

1000.00

cal

239.006

Cal

0.239006

kcal

0.239006

BTU

0.947817

thm

0.00000947817

6.24151e+21

keV

6.24151e+18

MeV

6.24151e+15

ft·lbf

737.562

erg

1.00000e+10

Conversion Formulas

J definition

W = F × d (1 J = 1 N·m = 1 kg·m²/s²)

J to cal

1 J = 0.239006 cal

J to kWh

1 J = 2.77778 × 10⁻⁷ kWh

J to BTU

1 J = 0.000947817 BTU

kWh to J

1 kWh = 3,600,000 J

cal to J

1 cal = 4.184 J

BTU to J

1 BTU = 1,055.06 J

eV to J

1 eV = 1.602 × 10⁻¹⁹ J

Reference Information

Power

Power (P) = Energy (E) / Time (t)

Work

Work (W) = Force (F) × Distance (d)

Kinetic Energy

Kinetic energy: KE = ½mv²

Potential Energy

Potential energy: PE = mgh

Food Calories

Food Calorie (Cal) equals kilocalorie (kcal)

Energy Units Guide

Joule (J)

SI base unit. Work done by 1 N force over 1 m distance

Calorie (cal)

Heat required to raise 1g of water by 1°C

Kilowatt-hour (kWh)

Unit of energy. Energy consumed by 1 kW for 1 hour

What is the Energy Converter?

A tool that converts between 11 different energy units in real-time, including Joule (J), kilowatt-hour (kWh), calorie (cal), BTU, and electron volt (eV). Enter a value to see conversion results for all units simultaneously.

Energy