kJ to Wh converter

1 kilojoule equals 0.27777778 watt-hours. Conversions use Wh = kJ × 0.277778

kJ → 0.27777778 Wh

Wh = kJ × 0.277778

Converter

Worked examples

1 kJ = 0.27777778 Wh
2 kJ = 0.55555556 Wh
5 kJ = 1.388889 Wh
10 kJ = 2.777778 Wh
100 kJ = 27.777778 Wh

kilojoules to watt-hours conversion table

kJ	Wh	Arithmetic
1 kJ	0.27777778 Wh	× 0.277778
2 kJ	0.55555556 Wh	× 0.277778
3 kJ	0.83333333 Wh	× 0.277778
4 kJ	1.111111 Wh	× 0.277778
5 kJ	1.388889 Wh	× 0.277778
6 kJ	1.666667 Wh	× 0.277778
8 kJ	2.222222 Wh	× 0.277778
10 kJ	2.777778 Wh	× 0.277778
12 kJ	3.333333 Wh	× 0.277778
15 kJ	4.166667 Wh	× 0.277778
20 kJ	5.555556 Wh	× 0.277778
25 kJ	6.944444 Wh	× 0.277778
30 kJ	8.333333 Wh	× 0.277778
40 kJ	11.111111 Wh	× 0.277778
50 kJ	13.888889 Wh	× 0.277778
60 kJ	16.666667 Wh	× 0.277778
70 kJ	19.444444 Wh	× 0.277778
80 kJ	22.222222 Wh	× 0.277778
90 kJ	25 Wh	× 0.277778
100 kJ	27.777778 Wh	× 0.277778

How to convert kJ to Wh

Take your value in kilojoules.
Multiply by 0.277778
That is your answer in watt-hours — no rounding needed until you choose a display precision.

Related conversions

Wh to kJ J to Wh kJ to J kJ to cal kJ to kcal kJ to kWh kJ to Btu cal to Wh kcal to Wh all energy units

Questions

How many watt-hours in 1 kilojoule?

Exactly 0.27777778 Wh. The factor follows from the definitions of both units, not from a measurement, so it is exact.

How do I convert kJ to Wh?

Multiply the kilojoules figure by 0.277778 — or use the converter above, which updates as you type.

Is kJ to Wh the same as Wh to kJ?

No — they are inverses. One kJ is 0.27777778 Wh, while one Wh is 3.6 kJ.

What is 1 kJ in Wh?

1 kJ = 0.27777778 Wh (see the value page for the full arithmetic).