Sumwise

Miles per hour to kilometers per hour

kilometers per hour = miles per hour × 1.609344

Reverse: kilometers per hour to miles per hour

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How to convert miles per hour to kilometers per hour

One mile per hour is 1.609344 kilometers per hour, so multiply the number of miles per hour by 1.609344. For example, 20 miles per hour is 20 × 1.609344 = 32.18688 kilometers per hour. To go back, divide by the same number, or multiply by 0.62137119.

Quick estimate

Multiplying by about 1.6 gets within 0.6% of the exact answer, which is enough to check that a result makes sense.

Where it comes up

Speed conversions come up when driving abroad, in running and cycling paces, weather and wind reports, and sailing and flying.

miles per hourkilometers per hour
1 mph1.609344 kph
2 mph3.218688 kph
3 mph4.828032 kph
4 mph6.437376 kph
5 mph8.04672 kph
6 mph9.656064 kph
7 mph11.265408 kph
8 mph12.874752 kph
9 mph14.484096 kph
10 mph16.09344 kph
11 mph17.702784 kph
12 mph19.312128 kph
13 mph20.921472 kph
14 mph22.530816 kph
15 mph24.14016 kph
16 mph25.749504 kph
17 mph27.358848 kph
18 mph28.968192 kph
19 mph30.577536 kph
20 mph32.18688 kph
25 mph40.2336 kph
30 mph48.28032 kph
40 mph64.37376 kph
50 mph80.4672 kph
60 mph96.56064 kph
70 mph112.65408 kph
75 mph120.7008 kph
80 mph128.74752 kph
90 mph144.84096 kph
100 mph160.9344 kph
120 mph193.12128 kph
150 mph241.4016 kph
200 mph321.8688 kph
250 mph402.336 kph
300 mph482.8032 kph
400 mph643.7376 kph
500 mph804.672 kph
750 mph1,207.01 kph
1,000 mph1,609.34 kph
1,500 mph2,414.02 kph
2,000 mph3,218.69 kph
5,000 mph8,046.72 kph
10,000 mph16,093.44 kph

Questions

How many kilometers per hour are in a mile per hour?

1.609344 kilometers per hour.

How do I convert miles per hour to kilometers per hour in a spreadsheet?

Put the value in A1 and type =A1*1.609344, then fill the formula down the column.

Are the values in the table exact?

They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.