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Speed converter

Kilometers per hour, miles per hour, knots, meters and feet per second.

Result

≈ 62.13711922 mph

1 kilometer per hour = about 0.621371192237 miles per hour

How we got this

  1. 1 kilometer per hour = about 0.621371192237 miles per hour
  2. Multiply: 100 × 0.621371192237… ≈ 62.13711922 mph
The same value in every unit
meters per second≈ 27.77777778 m/s
kilometers per hour100 km/h
miles per hour≈ 62.13711922 mph
knots≈ 53.99568035 kn
feet per second≈ 91.13444153 ft/s

Worked out on your device. Nothing is sent anywhere.

Common conversions

Kilometers per hour to miles per hour
Kilometers per hour (km/h)Miles per hour (mph)
10≈ 6.213711922
20≈ 12.42742384
30≈ 18.64113577
40≈ 24.85484769
50≈ 31.06855961
60≈ 37.28227153
80≈ 49.70969538
100≈ 62.13711922
110≈ 68.35083115
120≈ 74.56454307
130≈ 80.77825499
Miles per hour to kilometers per hour
Miles per hour (mph)Kilometers per hour (km/h)
1016.09344
2032.18688
2540.2336
3048.28032
4064.37376
5080.4672
5588.51392
6096.56064
65104.60736
70112.65408
75120.7008
80128.74752
Knots to kilometers per hour
Knots (kn)Kilometers per hour (km/h)
11.852
59.26
1018.52
2037.04
3055.56
5092.6

The definitions

Speed units are a length per time, so they follow from the length definitions: 1 mph is exactly 1.609344 km/h, 1 knot (a nautical mile per hour) is exactly 1.852 km/h, and 1 m/s is 3.6 km/h. 60 mph is exactly 88 feet per second.

Ships and aircraft use knots because a nautical mile is based on one minute of latitude, which makes distances on charts easy to measure. Wind speeds are given in knots, mph or km/h depending on the country.

Questions

How do I convert km/h to mph?

Divide by 1.609344, or multiply by about 0.6214. 100 km/h is about 62.14 mph. In your head: multiply by 6 and drop a zero (100 km/h → about 60 mph).

How do I convert mph to km/h?

Multiply by 1.609344. 70 mph is 112.65 km/h. Roughly, add 60%: 50 mph is about 80 km/h.

How fast is a knot?

One nautical mile per hour: exactly 1.852 km/h, or about 1.151 mph.

How do I turn m/s into km/h?

Multiply by 3.6, because there are 3,600 seconds in an hour and 1,000 meters in a kilometer. 10 m/s is 36 km/h.

Is anything I enter sent anywhere?

No. Conversions are worked out in your browser. The value and units appear in the page address only so you can bookmark or share them.

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