calcanswers.com All calculators

MPH to KM/H and KM/H to MPH

Conversions

Choose a direction and enter the speed. The converter uses the exact length of a mile, 1.609344 km, and also shows the speed in meters per second. A chart of common speeds follows below.

Convert

Use a period for decimals, like 12.5. Commas for thousands are fine. The result updates as you type.Decimals with a period, like 12.5

Your entries stay on your device. The math runs right in your browser.

Result: In kilometers per hour

96.56km/h

60 mph is 96.56 km/h.

  • In meters per second: 26.82 m/s

Step by step

60 × 1.609344 = 96.56 km/h

  1. A mile is exactly 1.609344 km: 60 × 1.609344 = 96.56 km/h.
  2. In meters per second: 96.56 / 3.6 = 26.82 m/s.

Formula

km/h = mph × 1.609344
m/s = km/h / 3.6
mph
miles per hour
km/h
kilometers per hour
m/s
meters per second

How it works

A mile is exactly 1.609344 kilometers, so a speed of one mile per hour is exactly 1.609344 km/h. To convert mph to km/h, multiply by 1.609344: 65 mph are 104.61 km/h. To convert km/h to mph, divide by 1.609344: 100 km/h are 62.14 mph.

Canada, Mexico and almost every country outside the US and the UK post speed limits in kilometers per hour. A handy mental check: km/h times 0.6 is close to mph (100 km/h ≈ 60 mph, exactly 62.1), and mph times 1.6 is close to km/h. The converter always uses the exact factor.

Meters per second, shown as well, is the SI unit of speed used in science and for wind: km/h divided by 3.6. 60 mph are 26.82 m/s. For distances rather than speeds, use the km to miles converter.

The formula

The factor follows from the definition of the mile: 1,760 yards of exactly 0.9144 meters each, 1,609.344 meters. An hour has 3,600 seconds, which is where the 3.6 for meters per second comes from (1,000 m / 3,600 s).

Dividing by 1.609344 is the same as multiplying by 0.621371. The chart lists common speeds in steps of 5 mph up to 100 mph and in steps of 10 mph above.

Example

A sign in Canada says 100 km/h. How fast is that in mph?

  1. Divide by 1.609344: 100 / 1.609344 = 62.14 mph.
  2. So 100 km/h is a bit above 60 mph, like a typical US highway limit of 60 to 65 mph.

100 km/h is 62.14 mph.

Load this example into the calculator

MPH to km/h chart

Speed in miles per hourIn kilometers per hourIn meters per second
5 mph8.05 km/h2.24 m/s
10 mph16.09 km/h4.47 m/s
15 mph24.14 km/h6.71 m/s
20 mph32.19 km/h8.94 m/s
25 mph40.23 km/h11.18 m/s
30 mph48.28 km/h13.41 m/s
35 mph56.33 km/h15.65 m/s
40 mph64.37 km/h17.88 m/s
45 mph72.42 km/h20.12 m/s
50 mph80.47 km/h22.35 m/s
55 mph88.51 km/h24.59 m/s
60 mph96.56 km/h26.82 m/s
65 mph104.61 km/h29.06 m/s
70 mph112.65 km/h31.29 m/s
75 mph120.7 km/h33.53 m/s
80 mph128.75 km/h35.76 m/s
85 mph136.79 km/h38 m/s
90 mph144.84 km/h40.23 m/s
95 mph152.89 km/h42.47 m/s
100 mph160.93 km/h44.7 m/s
110 mph177.03 km/h49.17 m/s
120 mph193.12 km/h53.64 m/s
130 mph209.21 km/h58.12 m/s
140 mph225.31 km/h62.59 m/s
150 mph241.4 km/h67.06 m/s
160 mph257.5 km/h71.53 m/s
170 mph273.59 km/h76 m/s
180 mph289.68 km/h80.47 m/s
190 mph305.78 km/h84.94 m/s
200 mph321.87 km/h89.41 m/s

Frequently asked questions

How fast is 100 km/h in mph?

100 km/h is 62.14 mph. Other common limits: 50 km/h is 31.07 mph, 80 km/h is 49.71 mph and 120 km/h is 74.56 mph. Higher speeds: 130 km/h is 80.78 mph, 200 km/h is 124.27 mph and 300 km/h is 186.41 mph.

How many km/h is 60 mph?

60 mph is 96.56 km/h (60 × 1.609344). 30 mph is 48.28 km/h, 55 mph is 88.51 km/h and 70 mph is 112.65 km/h.

Is km/h the same as kph?

Yes. km/h, kph and km/hr all mean kilometers per hour. The official SI symbol is km/h.

What is a knot in mph?

A knot is one nautical mile per hour, exactly 1.852 km/h or about 1.151 mph. It is used at sea and in aviation; this converter handles ordinary statute miles.

Last updated: Responsible editor: Jared Alan
Checked against 13 test cases · How we test
Sources: