The watt-second is a unit of energy that represents the amount of work done when a power of one watt is sustained for one second. This unit is a direct way to visualize energy transfer in everyday activities. Interestingly, while it may sound abstract, this unit can be directly applied to understand how quick appliances like LED lights or small electronic devices consume energy. For example, a modern LED bulb that consumes 10 watts of power will use 10 watt-seconds of energy every second it is on.
While commonly overshadowed by the more familiar joule, the watt-second is essentially equivalent to one joule. Its simplicity in denoting power over time makes it a cornerstone concept in physics and engineering, where it is applied to calculate specific energy transfers and efficiency in varied systems. Exploring this unit helps bridge the gap between theoretical energy calculations and practical everyday energy use.
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!
Watt-seconds | Watt-minutes |
---|---|
0
Ws
|
0
Wm
|
100
Ws
|
1.66667
Wm
|
200
Ws
|
3.33333
Wm
|
300
Ws
|
5
Wm
|
400
Ws
|
6.66667
Wm
|
500
Ws
|
8.33333
Wm
|
600
Ws
|
10
Wm
|
700
Ws
|
11.66667
Wm
|
800
Ws
|
13.33333
Wm
|
900
Ws
|
15
Wm
|
1000
Ws
|
16.66667
Wm
|
1100
Ws
|
18.33333
Wm
|
1200
Ws
|
20
Wm
|
1300
Ws
|
21.66667
Wm
|
1400
Ws
|
23.33333
Wm
|
1500
Ws
|
25
Wm
|
1600
Ws
|
26.66667
Wm
|
1700
Ws
|
28.33333
Wm
|
1800
Ws
|
30
Wm
|
1900
Ws
|
31.66667
Wm
|
2000
Ws
|
33.33333
Wm
|
2100
Ws
|
35
Wm
|
2200
Ws
|
36.66667
Wm
|
2300
Ws
|
38.33333
Wm
|
2400
Ws
|
40
Wm
|
2500
Ws
|
41.66667
Wm
|
2600
Ws
|
43.33333
Wm
|
2700
Ws
|
45
Wm
|
2800
Ws
|
46.66667
Wm
|
2900
Ws
|
48.33333
Wm
|
3000
Ws
|
50
Wm
|
3100
Ws
|
51.66667
Wm
|
3200
Ws
|
53.33333
Wm
|
3300
Ws
|
55
Wm
|
3400
Ws
|
56.66667
Wm
|
3500
Ws
|
58.33333
Wm
|
3600
Ws
|
60
Wm
|
3700
Ws
|
61.66667
Wm
|
3800
Ws
|
63.33333
Wm
|
3900
Ws
|
65
Wm
|
4000
Ws
|
66.66667
Wm
|
4100
Ws
|
68.33333
Wm
|
4200
Ws
|
70
Wm
|
4300
Ws
|
71.66667
Wm
|
4400
Ws
|
73.33333
Wm
|
4500
Ws
|
75
Wm
|
4600
Ws
|
76.66667
Wm
|
4700
Ws
|
78.33333
Wm
|
4800
Ws
|
80
Wm
|
4900
Ws
|
81.66667
Wm
|
5000
Ws
|
83.33333
Wm
|
5100
Ws
|
85
Wm
|
5200
Ws
|
86.66667
Wm
|
5300
Ws
|
88.33333
Wm
|
5400
Ws
|
90
Wm
|
5500
Ws
|
91.66667
Wm
|
5600
Ws
|
93.33333
Wm
|
5700
Ws
|
95
Wm
|
5800
Ws
|
96.66667
Wm
|
5900
Ws
|
98.33333
Wm
|
6000
Ws
|
100
Wm
|
6100
Ws
|
101.66667
Wm
|
6200
Ws
|
103.33333
Wm
|
6300
Ws
|
105
Wm
|
6400
Ws
|
106.66667
Wm
|
6500
Ws
|
108.33333
Wm
|
6600
Ws
|
110
Wm
|
6700
Ws
|
111.66667
Wm
|
6800
Ws
|
113.33333
Wm
|
6900
Ws
|
115
Wm
|
7000
Ws
|
116.66667
Wm
|
7100
Ws
|
118.33333
Wm
|
7200
Ws
|
120
Wm
|
7300
Ws
|
121.66667
Wm
|
7400
Ws
|
123.33333
Wm
|
7500
Ws
|
125
Wm
|
7600
Ws
|
126.66667
Wm
|
7700
Ws
|
128.33333
Wm
|
7800
Ws
|
130
Wm
|
7900
Ws
|
131.66667
Wm
|
8000
Ws
|
133.33333
Wm
|
8100
Ws
|
135
Wm
|
8200
Ws
|
136.66667
Wm
|
8300
Ws
|
138.33333
Wm
|
8400
Ws
|
140
Wm
|
8500
Ws
|
141.66667
Wm
|
8600
Ws
|
143.33333
Wm
|
8700
Ws
|
145
Wm
|
8800
Ws
|
146.66667
Wm
|
8900
Ws
|
148.33333
Wm
|
9000
Ws
|
150
Wm
|
9100
Ws
|
151.66667
Wm
|
9200
Ws
|
153.33333
Wm
|
9300
Ws
|
155
Wm
|
9400
Ws
|
156.66667
Wm
|
9500
Ws
|
158.33333
Wm
|
9600
Ws
|
160
Wm
|
9700
Ws
|
161.66667
Wm
|
9800
Ws
|
163.33333
Wm
|
9900
Ws
|
165
Wm
|
10000
Ws
|
166.66667
Wm
|
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