Measurement: energy

First object	Value
1 J	1 J
1 kWh	3,600,000 J

1 ÷ 3,600,000 ≈ 2.78e-7

Sources & method

Energy is measured in joules. A watt-hour is 3600 joules because one watt is one joule per second and an hour has 3600 seconds. Energy and power are different quantities.

Ratio = first value ÷ second value. For areas, side lengths use the square root of the area ratio. Diameter and height use a linear scale.

BIPM · SI Brochure

Choose another pair, swap objects or enter a custom reference. Shared links preserve your settings; SVG downloads preserve the labels and exact values.

Updated 23 October 2026 · Denny Lim

Related activities

1 J vs 1 kJ · energy

1 J has 0.001 times the energy of 1 kJ. Choose another pair, swap objects or enter a custom reference. Shared links preserve your settings; SVG downloads preserve the labels and exact values.

1 J vs 1 Wh · energy

1 J has 2.78e-4 times the energy of 1 Wh. Choose another pair, swap objects or enter a custom reference. Shared links preserve your settings; SVG downloads preserve the labels and exact values.

1 J vs 1 MJ · energy

1 J has 1.00e-6 times the energy of 1 MJ. Choose another pair, swap objects or enter a custom reference. Shared links preserve your settings; SVG downloads preserve the labels and exact values.

1 kJ vs 1 kWh · energy

1 kJ has 2.78e-4 times the energy of 1 kWh. Choose another pair, swap objects or enter a custom reference. Shared links preserve your settings; SVG downloads preserve the labels and exact values.

1 Wh vs 1 kWh · energy

1 Wh has 0.001 times the energy of 1 kWh. Choose another pair, swap objects or enter a custom reference. Shared links preserve your settings; SVG downloads preserve the labels and exact values.

1 MJ vs 1 kWh · energy

1 MJ has 0.27777778 times the energy of 1 kWh. Choose another pair, swap objects or enter a custom reference. Shared links preserve your settings; SVG downloads preserve the labels and exact values.

1 J vs 1 kWh · energy

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