The watt-minute is a lesser-known unit of energy, yet it plays a significant role in understanding everyday energy consumption. It is equivalent to 60 joules and is simply the amount of energy produced or consumed by a power of one watt over one minute. Although not commonly used in everyday measurements, watt-minutes can be instrumental in more precise energy calculations, such as for electrical appliances or industrial equipment, providing insights between larger units like kilowatt-hours and smaller units like joules.
Intriguingly, it takes roughly 15 watt-minutes to charge a modern smartphone for one minute of talk time. This highlights how even small units can offer a clearer perspective on our energy usage, encouraging us to be more mindful of our energy habits!
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.
Watt-minutes | Milliwatt-hours |
---|---|
0
Wm
|
0
mWh
|
10
Wm
|
166.66667
mWh
|
20
Wm
|
333.33333
mWh
|
30
Wm
|
500
mWh
|
40
Wm
|
666.66667
mWh
|
50
Wm
|
833.33333
mWh
|
60
Wm
|
1000
mWh
|
70
Wm
|
1166.66667
mWh
|
80
Wm
|
1333.33333
mWh
|
90
Wm
|
1500
mWh
|
100
Wm
|
1666.66667
mWh
|
110
Wm
|
1833.33333
mWh
|
120
Wm
|
2000
mWh
|
130
Wm
|
2166.66667
mWh
|
140
Wm
|
2333.33333
mWh
|
150
Wm
|
2500
mWh
|
160
Wm
|
2666.66667
mWh
|
170
Wm
|
2833.33333
mWh
|
180
Wm
|
3000
mWh
|
190
Wm
|
3166.66667
mWh
|
200
Wm
|
3333.33333
mWh
|
210
Wm
|
3500
mWh
|
220
Wm
|
3666.66667
mWh
|
230
Wm
|
3833.33333
mWh
|
240
Wm
|
4000
mWh
|
250
Wm
|
4166.66667
mWh
|
260
Wm
|
4333.33333
mWh
|
270
Wm
|
4500
mWh
|
280
Wm
|
4666.66667
mWh
|
290
Wm
|
4833.33333
mWh
|
300
Wm
|
5000
mWh
|
310
Wm
|
5166.66667
mWh
|
320
Wm
|
5333.33333
mWh
|
330
Wm
|
5500
mWh
|
340
Wm
|
5666.66667
mWh
|
350
Wm
|
5833.33333
mWh
|
360
Wm
|
6000
mWh
|
370
Wm
|
6166.66667
mWh
|
380
Wm
|
6333.33333
mWh
|
390
Wm
|
6500
mWh
|
400
Wm
|
6666.66667
mWh
|
410
Wm
|
6833.33333
mWh
|
420
Wm
|
7000
mWh
|
430
Wm
|
7166.66667
mWh
|
440
Wm
|
7333.33333
mWh
|
450
Wm
|
7500
mWh
|
460
Wm
|
7666.66667
mWh
|
470
Wm
|
7833.33333
mWh
|
480
Wm
|
8000
mWh
|
490
Wm
|
8166.66667
mWh
|
500
Wm
|
8333.33333
mWh
|
510
Wm
|
8500
mWh
|
520
Wm
|
8666.66667
mWh
|
530
Wm
|
8833.33333
mWh
|
540
Wm
|
9000
mWh
|
550
Wm
|
9166.66667
mWh
|
560
Wm
|
9333.33333
mWh
|
570
Wm
|
9500
mWh
|
580
Wm
|
9666.66667
mWh
|
590
Wm
|
9833.33333
mWh
|
600
Wm
|
10000
mWh
|
610
Wm
|
10166.66667
mWh
|
620
Wm
|
10333.33333
mWh
|
630
Wm
|
10500
mWh
|
640
Wm
|
10666.66667
mWh
|
650
Wm
|
10833.33333
mWh
|
660
Wm
|
11000
mWh
|
670
Wm
|
11166.66667
mWh
|
680
Wm
|
11333.33333
mWh
|
690
Wm
|
11500
mWh
|
700
Wm
|
11666.66667
mWh
|
710
Wm
|
11833.33333
mWh
|
720
Wm
|
12000
mWh
|
730
Wm
|
12166.66667
mWh
|
740
Wm
|
12333.33333
mWh
|
750
Wm
|
12500
mWh
|
760
Wm
|
12666.66667
mWh
|
770
Wm
|
12833.33333
mWh
|
780
Wm
|
13000
mWh
|
790
Wm
|
13166.66667
mWh
|
800
Wm
|
13333.33333
mWh
|
810
Wm
|
13500
mWh
|
820
Wm
|
13666.66667
mWh
|
830
Wm
|
13833.33333
mWh
|
840
Wm
|
14000
mWh
|
850
Wm
|
14166.66667
mWh
|
860
Wm
|
14333.33333
mWh
|
870
Wm
|
14500
mWh
|
880
Wm
|
14666.66667
mWh
|
890
Wm
|
14833.33333
mWh
|
900
Wm
|
15000
mWh
|
910
Wm
|
15166.66667
mWh
|
920
Wm
|
15333.33333
mWh
|
930
Wm
|
15500
mWh
|
940
Wm
|
15666.66667
mWh
|
950
Wm
|
15833.33333
mWh
|
960
Wm
|
16000
mWh
|
970
Wm
|
16166.66667
mWh
|
980
Wm
|
16333.33333
mWh
|
990
Wm
|
16500
mWh
|
1000
Wm
|
16666.66667
mWh
|
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