Metric Conversions
Metric Conversions

Watt Hours to Joules (Wh → J)

3,600.0

1.0000 Wh = 3,600.0 J

Formula

1 Wh = 3600 J
Joules → Watt Hours (Swap Units)

Conversion Table

WhJ
00
1.00003,600.0
2.00007,200.0
3.000010,800
4.000014,400
5.000018,000
6.000021,600
7.000025,200
8.000028,800
9.000032,400
10.00036,000
11.00039,600
12.00043,200
13.00046,800
14.00050,400
15.00054,000
16.00057,600
17.00061,200
18.00064,800
19.00068,400
WhJ
20.00072,000
21.00075,600
22.00079,200
23.00082,800
24.00086,400
25.00090,000
26.00093,600
27.00097,200
28.000100,800
29.000104,400
30.000108,000
31.000111,600
32.000115,200
33.000118,800
34.000122,400
35.000126,000
36.000129,600
37.000133,200
38.000136,800
39.000140,400
WhJ
40.000144,000
41.000147,600
42.000151,200
43.000154,800
44.000158,400
45.000162,000
46.000165,600
47.000169,200
48.000172,800
49.000176,400
50.000180,000
51.000183,600
52.000187,200
53.000190,800
54.000194,400
55.000198,000
56.000201,600
57.000205,200
58.000208,800
59.000212,400
WhJ
60.000216,000
61.000219,600
62.000223,200
63.000226,800
64.000230,400
65.000234,000
66.000237,600
67.000241,200
68.000244,800
69.000248,400
70.000252,000
71.000255,600
72.000259,200
73.000262,800
74.000266,400
75.000270,000
76.000273,600
77.000277,200
78.000280,800
79.000284,400

Watt Hours to Joules Conversion

Converting Watt Hours (Wh) to Joules (J) is a common energy and power conversion. 1 Wh equals 3,600 J. For example, 100 Wh is equal to 360,000 J.

Quick Mental Math: Watt Hours to Joules

0.01389 watt hours is 50 joules, so use that as the mental anchor.

Why is converting Watt Hours to Joules tricky?

watt hours to joules uses an awkward ratio, so people often round too early or move the decimal the wrong way.

Quick Reference Values

1 Wh = 3,600 J. 5 Wh = 18,000 J. 10 Wh = 36,000 J. 25 Wh = 90,000 J. 50 Wh = 180,000 J. 100 Wh = 360,000 J.

What is Watt Hours?

Watt Hours (Wh) is a unit of energy and power. A watt-hour (Wh) measures energy equivalent to one watt of power expended for one hour. It equals 3600 joules in SI derived units, where 1 Wh = 1 W × 3600 s. Watt-hours quantify electrical energy consumption and storage in batteries and utility meters [nist-si-guide]. The watt-hour emerged with the widespread use of electric power in the late 19th century. It was standardized as an energy unit by electrical engineers and later formalized within the International System of Units framework [bipm-si-brochure]. Utility companies worldwide bill electricity in kilowatt-hours, a multiple of watt-hours. The unit is critical for residential, commercial, and industrial energy monitoring and renewable energy systems across all continents [nist-si-guide].

What is Joules?

Joules (J) is a unit of energy and power. The joule is the SI unit of energy defined as the work done when a force of one newton moves an object one meter in the direction of the force. It equals one kilogram meter squared per second squared (kg·m²/s²). This definition aligns with the International System of Units as standardized by the BIPM [bipm-si-brochure]. The joule is named after James Prescott Joule, a 19th-century physicist who studied energy conservation. It was officially adopted as a unit of energy by the CGPM in 1948 to unify energy measurement standards internationally [cgpm-resolutions]. Joules are used worldwide in physics, engineering, and electrical industries to quantify energy, work, and heat. Countries using the SI system, including those in Europe, Asia, and the Americas, rely on joules for scientific and industrial applications [nist-si-guide].

Common Misspellings

People often search for this conversion using these alternate spellings: watt hours, watt-hour, watt hour, watthours, joule, joul, jouls, juls. All of these refer to the Watt Hours to Joules conversion.

Common Conversions

Watt Hours → KilojoulesKilojoules → JoulesWatt Hours → MegajoulesMegajoules → JoulesWatt Hours → GigajoulesGigajoules → JoulesWatt Hours → CaloriesCalories → JoulesWatt Hours → KilocaloriesKilocalories → Joules