At One Place

Watt-hours to joules

1 watt-hour in joules
1 Wh = 3,600 J
J = Wh × 3,600

To convert watt-hours to joules, multiply by 3,600. The table below gives the values people look up most often, and the converter works for any number.

Watt-hours to joules table

Common watt-hour values converted to joules.
Watt-hours Joules
1 Wh 3,600
2 Wh 7,200
3 Wh 10,800
4 Wh 14,400
5 Wh 18,000
10 Wh 36,000
15 Wh 54,000
20 Wh 72,000
25 Wh 90,000
30 Wh 108,000
40 Wh 144,000
50 Wh 180,000
75 Wh 270,000
100 Wh 360,000
250 Wh 900,000
500 Wh 1,800,000
1,000 Wh 3,600,000

How the conversion works

The relationship is J = Wh × 3,600. Both units measure energy, so the conversion is a fixed factor that never changes.

Common questions

How many joules are in one watt-hour?
One watt-hour equals 3,600 joules. J = Wh × 3,600.
How do you convert watt-hours to joules?
Use J = Wh × 3,600. So 10 Wh is 36,000 J.
How many watt-hours are in one joule?
One joule equals 0.0002778 watt-hours, which is the reverse of the conversion above.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked