J / Wh

Joule to Watt-hour converter

1 J = 0.000278 Wh

This is the Joule to Watt-hour converter. The factor is fixed: 1 J = 0.00027777777777774823 Wh. Open a common amount below, or type any value — only selected amounts are indexed.

Common values

watt-hour to joule 2 joules in watt-hour 3 joules in watt-hour 4 joules in watt-hour 5 joules in watt-hour 6 joules in watt-hour 8 joules in watt-hour 10 joules in watt-hour 12 joules in watt-hour 15 joules in watt-hour 20 joules in watt-hour

Same amount, other units

1 joule → kcal 1 joule → kJ

Related converters

J → kcal J → kJ

Formula: joule to watt-hour

Wh = J × 0.000278 (1 J = 0.000278 WH)

Reference values: joule → watt-hour

J	Wh
1 J	0.000278 Wh
100 J	0.027778 Wh
200 J	0.055556 Wh
500 J	0.138889 Wh
1000 J	0.277778 Wh
2000 J	0.555556 Wh

Common conversions

1 J → 0.000278 Wh 2 J → 0.000556 Wh 3 J → 0.000833 Wh 4 J → 0.001111 Wh 5 J → 0.001389 Wh 6 J → 0.001667 Wh 8 J → 0.002222 Wh 10 J → 0.002778 Wh 12 J → 0.003333 Wh 15 J → 0.004167 Wh 20 J → 0.005556 Wh 25 J → 0.006944 Wh

FAQ for J → Wh

Is kWh the same as a food calorie?

No. kWh is electrical energy; kcal is common on food labels. We only convert physical energy equivalents.

How many kcal in 1 kWh?

About 860.4 kcal (thermochemical, since 1 kWh = 3.6 MJ). See the live factor on this page.

Formula?

Wh = J × 0.000278 (1 J = 0.000278 WH)

Reverse?

1 watt-hour ≈ 3600 joule.

How much is 1 joule in watt-hour?

0.000278 watt-hour. Factor 1 joule = 0.000278 watt-hour.

How the Joule to Watt-hour converter works

This hub describes the pair, not a single number. Pages like 1, 10 or 100 Joule answer exact searches.

NiftyRecipe uses thermochemical energy factors (for example 1 kcal = 4184 J). Results do not change with the time of day.