Horsepower is a unit of power that originated in the 18th century, coined by engineer James Watt to compare the output of steam engines with the power of draft horses. A fascinating aspect is the value assigned to this measurement: 1 British horsepower equals approximately 745.7 watts. To put this into perspective, this means that just one horsepower can light up more than ten 60-watt light bulbs!
Interestingly, the unit became widely adopted not for its precision but as a marketing tool. Since people were familiar with the strength of horses in everyday tasks, comparing engine power to horses made industrial power even more relatable and understandable during the Industrial Revolution. Today, horsepower continues to be an essential metric in the automotive and engine industries worldwide, despite its equine origins.
The kilowatt, a unit of power equal to 1,000 watts, is widely used to measure electricity consumption and production. Beyond its role in tracking household energy use, the kilowatt also plays a critical part in the automotive industry, especially with the rise of electric vehicles (EVs). Interestingly, while car enthusiasts often discuss horsepower, the power of EVs is typically rated in kilowatts. For instance, 1 kilowatt roughly equals 1.34 horsepower.
Moreover, the record for the highest wind turbine currently stands at generating a jaw-dropping 14 megawatts—14,000 kilowatts—sufficient to power thousands of homes annually. As sustainable energy solutions become prominent, the kilowatt serves as a crucial unit for understanding and advancing our energy-efficient future.
Horsepower (British) | Kilowatts |
---|---|
0
hp
|
0
kW
|
10
hp
|
7.457
kW
|
20
hp
|
14.914
kW
|
30
hp
|
22.371
kW
|
40
hp
|
29.82799
kW
|
50
hp
|
37.28499
kW
|
60
hp
|
44.74199
kW
|
70
hp
|
52.19899
kW
|
80
hp
|
59.65599
kW
|
90
hp
|
67.11299
kW
|
100
hp
|
74.56999
kW
|
110
hp
|
82.02699
kW
|
120
hp
|
89.48398
kW
|
130
hp
|
96.94098
kW
|
140
hp
|
104.39798
kW
|
150
hp
|
111.85498
kW
|
160
hp
|
119.31198
kW
|
170
hp
|
126.76898
kW
|
180
hp
|
134.22598
kW
|
190
hp
|
141.68298
kW
|
200
hp
|
149.13997
kW
|
210
hp
|
156.59697
kW
|
220
hp
|
164.05397
kW
|
230
hp
|
171.51097
kW
|
240
hp
|
178.96797
kW
|
250
hp
|
186.42497
kW
|
260
hp
|
193.88197
kW
|
270
hp
|
201.33897
kW
|
280
hp
|
208.79596
kW
|
290
hp
|
216.25296
kW
|
300
hp
|
223.70996
kW
|
310
hp
|
231.16696
kW
|
320
hp
|
238.62396
kW
|
330
hp
|
246.08096
kW
|
340
hp
|
253.53796
kW
|
350
hp
|
260.99496
kW
|
360
hp
|
268.45195
kW
|
370
hp
|
275.90895
kW
|
380
hp
|
283.36595
kW
|
390
hp
|
290.82295
kW
|
400
hp
|
298.27995
kW
|
410
hp
|
305.73695
kW
|
420
hp
|
313.19395
kW
|
430
hp
|
320.65094
kW
|
440
hp
|
328.10794
kW
|
450
hp
|
335.56494
kW
|
460
hp
|
343.02194
kW
|
470
hp
|
350.47894
kW
|
480
hp
|
357.93594
kW
|
490
hp
|
365.39294
kW
|
500
hp
|
372.84994
kW
|
510
hp
|
380.30693
kW
|
520
hp
|
387.76393
kW
|
530
hp
|
395.22093
kW
|
540
hp
|
402.67793
kW
|
550
hp
|
410.13493
kW
|
560
hp
|
417.59193
kW
|
570
hp
|
425.04893
kW
|
580
hp
|
432.50593
kW
|
590
hp
|
439.96292
kW
|
600
hp
|
447.41992
kW
|
610
hp
|
454.87692
kW
|
620
hp
|
462.33392
kW
|
630
hp
|
469.79092
kW
|
640
hp
|
477.24792
kW
|
650
hp
|
484.70492
kW
|
660
hp
|
492.16192
kW
|
670
hp
|
499.61891
kW
|
680
hp
|
507.07591
kW
|
690
hp
|
514.53291
kW
|
700
hp
|
521.98991
kW
|
710
hp
|
529.44691
kW
|
720
hp
|
536.90391
kW
|
730
hp
|
544.36091
kW
|
740
hp
|
551.81791
kW
|
750
hp
|
559.2749
kW
|
760
hp
|
566.7319
kW
|
770
hp
|
574.1889
kW
|
780
hp
|
581.6459
kW
|
790
hp
|
589.1029
kW
|
800
hp
|
596.5599
kW
|
810
hp
|
604.0169
kW
|
820
hp
|
611.47389
kW
|
830
hp
|
618.93089
kW
|
840
hp
|
626.38789
kW
|
850
hp
|
633.84489
kW
|
860
hp
|
641.30189
kW
|
870
hp
|
648.75889
kW
|
880
hp
|
656.21589
kW
|
890
hp
|
663.67289
kW
|
900
hp
|
671.12988
kW
|
910
hp
|
678.58688
kW
|
920
hp
|
686.04388
kW
|
930
hp
|
693.50088
kW
|
940
hp
|
700.95788
kW
|
950
hp
|
708.41488
kW
|
960
hp
|
715.87188
kW
|
970
hp
|
723.32888
kW
|
980
hp
|
730.78587
kW
|
990
hp
|
738.24287
kW
|
1000
hp
|
745.69987
kW
|
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