The kilowatt-hour (kWh) is a unit of energy that represents the amount of energy consumed or produced. Although commonly associated with electric bills, it has fascinating real-world applications. For example, one kWh can power a 100-watt incandescent light bulb for 10 hours or a modern energy-efficient LED bulb for around 50 hours. Interestingly, the kWh is not just for electricity—it’s also used in renewable energy systems to measure solar and wind power production efficiencies.
Beyond its practical uses, kilowatt-hours reveal intriguing insights into our energy consumption patterns. For instance, the average U.S. home consumes about 877 kWh per month, providing a benchmark for households exploring energy-saving measures. The kWh also serves as a universal language in global energy markets, standardizing costs and outputs across international borders.
The milliwatt-hour (mWh) might seem like a small unit of energy, but when you consider the burgeoning demand for portable technology, it plays a vital role in everyday electronics. This unit is commonly used to measure the energy capacity of small batteries, such as those found in smartphones, earbuds, and other miniature devices. Interestingly, even though a single milliwatt-hour is just a thousandth of a watt-hour, the overall efficiency of devices is often improved by optimizing such seemingly tiny units of energy.
For context, when you binge your favorite series on a compact digital device, you can thank the precise calculation of mWh for maximizing battery life without sacrificing performance. As technology advances, the milliwatt-hour will continue to dictate innovations in energy efficiency, making our devices smarter and more sustainable.
| Kilowatt-hours | Milliwatt-hours |
|---|---|
0
kWh
|
0
mWh
|
1
kWh
|
1000000
mWh
|
2
kWh
|
2000000
mWh
|
3
kWh
|
3000000
mWh
|
4
kWh
|
4000000
mWh
|
5
kWh
|
5000000
mWh
|
6
kWh
|
6000000
mWh
|
7
kWh
|
7000000
mWh
|
8
kWh
|
8000000
mWh
|
9
kWh
|
9000000
mWh
|
10
kWh
|
1e+7
mWh
|
11
kWh
|
1.1e+7
mWh
|
12
kWh
|
1.2e+7
mWh
|
13
kWh
|
1.3e+7
mWh
|
14
kWh
|
1.4e+7
mWh
|
15
kWh
|
1.5e+7
mWh
|
16
kWh
|
1.6e+7
mWh
|
17
kWh
|
1.7e+7
mWh
|
18
kWh
|
1.8e+7
mWh
|
19
kWh
|
1.9e+7
mWh
|
20
kWh
|
2e+7
mWh
|
21
kWh
|
2.1e+7
mWh
|
22
kWh
|
2.2e+7
mWh
|
23
kWh
|
2.3e+7
mWh
|
24
kWh
|
2.4e+7
mWh
|
25
kWh
|
2.5e+7
mWh
|
26
kWh
|
2.6e+7
mWh
|
27
kWh
|
2.7e+7
mWh
|
28
kWh
|
2.8e+7
mWh
|
29
kWh
|
2.9e+7
mWh
|
30
kWh
|
3e+7
mWh
|
31
kWh
|
3.1e+7
mWh
|
32
kWh
|
3.2e+7
mWh
|
33
kWh
|
3.3e+7
mWh
|
34
kWh
|
3.4e+7
mWh
|
35
kWh
|
3.5e+7
mWh
|
36
kWh
|
3.6e+7
mWh
|
37
kWh
|
3.7e+7
mWh
|
38
kWh
|
3.8e+7
mWh
|
39
kWh
|
3.9e+7
mWh
|
40
kWh
|
4e+7
mWh
|
41
kWh
|
4.1e+7
mWh
|
42
kWh
|
4.2e+7
mWh
|
43
kWh
|
4.3e+7
mWh
|
44
kWh
|
4.4e+7
mWh
|
45
kWh
|
4.5e+7
mWh
|
46
kWh
|
4.6e+7
mWh
|
47
kWh
|
4.7e+7
mWh
|
48
kWh
|
4.8e+7
mWh
|
49
kWh
|
4.9e+7
mWh
|
50
kWh
|
5e+7
mWh
|
51
kWh
|
5.1e+7
mWh
|
52
kWh
|
5.2e+7
mWh
|
53
kWh
|
5.3e+7
mWh
|
54
kWh
|
5.4e+7
mWh
|
55
kWh
|
5.5e+7
mWh
|
56
kWh
|
5.6e+7
mWh
|
57
kWh
|
5.7e+7
mWh
|
58
kWh
|
5.8e+7
mWh
|
59
kWh
|
5.9e+7
mWh
|
60
kWh
|
6e+7
mWh
|
61
kWh
|
6.1e+7
mWh
|
62
kWh
|
6.2e+7
mWh
|
63
kWh
|
6.3e+7
mWh
|
64
kWh
|
6.4e+7
mWh
|
65
kWh
|
6.5e+7
mWh
|
66
kWh
|
6.6e+7
mWh
|
67
kWh
|
6.7e+7
mWh
|
68
kWh
|
6.8e+7
mWh
|
69
kWh
|
6.9e+7
mWh
|
70
kWh
|
7e+7
mWh
|
71
kWh
|
7.1e+7
mWh
|
72
kWh
|
7.2e+7
mWh
|
73
kWh
|
7.3e+7
mWh
|
74
kWh
|
7.4e+7
mWh
|
75
kWh
|
7.5e+7
mWh
|
76
kWh
|
7.6e+7
mWh
|
77
kWh
|
7.7e+7
mWh
|
78
kWh
|
7.8e+7
mWh
|
79
kWh
|
7.9e+7
mWh
|
80
kWh
|
8e+7
mWh
|
81
kWh
|
8.1e+7
mWh
|
82
kWh
|
8.2e+7
mWh
|
83
kWh
|
8.3e+7
mWh
|
84
kWh
|
8.4e+7
mWh
|
85
kWh
|
8.5e+7
mWh
|
86
kWh
|
8.6e+7
mWh
|
87
kWh
|
8.7e+7
mWh
|
88
kWh
|
8.8e+7
mWh
|
89
kWh
|
8.9e+7
mWh
|
90
kWh
|
9e+7
mWh
|
91
kWh
|
9.1e+7
mWh
|
92
kWh
|
9.2e+7
mWh
|
93
kWh
|
9.3e+7
mWh
|
94
kWh
|
9.4e+7
mWh
|
95
kWh
|
9.5e+7
mWh
|
96
kWh
|
9.6e+7
mWh
|
97
kWh
|
9.7e+7
mWh
|
98
kWh
|
9.8e+7
mWh
|
99
kWh
|
9.9e+7
mWh
|
100
kWh
|
1e+8
mWh
|
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