Speed Converter
Convert speed instantly between km/h, mph, m/s and knots.
Converted speed
62.1371 mph
All Speed Conversions
View the speed in all supported units at once.
Kilometres per hour (km/h)
100
Miles per hour (mph)
62.1371
Metres per second (m/s)
27.7778
Knots (kn)
53.9957
Related Speed Conversion Tools
Need a quick conversion from kilometres per hour to miles per hour? Use our dedicated calculator for a simple and accurate result.
Common speed conversions
| km/h | mph | m/s | knots |
|---|---|---|---|
| 10 | 6.21 | 2.78 | 5.40 |
| 20 | 12.43 | 5.56 | 10.80 |
| 30 | 18.64 | 8.33 | 16.20 |
| 50 | 31.07 | 13.89 | 27.00 |
| 60 | 37.28 | 16.67 | 32.40 |
| 80 | 49.71 | 22.22 | 43.20 |
| 100 | 62.14 | 27.78 | 54.00 |
| 120 | 74.56 | 33.33 | 64.79 |
Knots to MPH Conversion Chart
Use this knots to mph chart to quickly convert common boat and marine speeds from knots to miles per hour. One knot equals approximately 1.15078 mph.
| Speed (knots) | Speed (mph) |
|---|---|
| 1 | 1.15 |
| 2 | 2.30 |
| 3 | 3.45 |
| 4 | 4.60 |
| 5 | 5.75 |
| 6 | 6.90 |
| 7 | 8.06 |
| 8 | 9.21 |
| 9 | 10.36 |
| 10 | 11.51 |
| 11 | 12.66 |
| 12 | 13.81 |
| 13 | 14.96 |
| 14 | 16.11 |
| 15 | 17.26 |
| 16 | 18.41 |
| 17 | 19.56 |
| 18 | 20.71 |
| 19 | 21.86 |
| 20 | 23.02 |
| 21 | 24.17 |
| 22 | 25.32 |
| 23 | 26.47 |
| 24 | 27.62 |
| 25 | 28.77 |
| 26 | 29.92 |
| 27 | 31.07 |
| 28 | 32.22 |
| 29 | 33.37 |
| 30 | 34.52 |
| 31 | 35.67 |
| 32 | 36.82 |
| 33 | 37.98 |
| 34 | 39.13 |
| 35 | 40.28 |
| 36 | 41.43 |
| 37 | 42.58 |
| 38 | 43.73 |
| 39 | 44.88 |
| 40 | 46.03 |
| 41 | 47.18 |
| 42 | 48.33 |
| 43 | 49.48 |
| 44 | 50.63 |
| 45 | 51.79 |
| 46 | 52.94 |
| 47 | 54.09 |
| 48 | 55.24 |
| 49 | 56.39 |
| 50 | 57.54 |
How to Convert km/h to mph
To convert kilometres per hour (km/h) to miles per hour (mph), divide the speed by 1.609344. For example, 100 km/h is approximately 62.14 mph. You can also use this free speed converter to convert between km/h, mph, metres per second (m/s) and knots.
Speed Conversion Formula
km/h to mph: divide by 1.609344. mph to km/h: multiply by 1.609344. km/h to m/s: divide by 3.6. km/h to knots: divide by 1.852.
Frequently Asked Questions
How many mph is 100 km/h?
100 km/h is approximately 62.14 mph.
How many mph is 1 knot?
1 knot is approximately 1.15078 miles per hour (mph).
How many mph is 10 knots?
10 knots is approximately 11.51 mph.
How many mph is 20 knots?
20 knots is approximately 23.02 mph.
How do you convert knots to mph?
Multiply the speed in knots by 1.150779448 to get miles per hour. For example, 10 knots × 1.150779448 equals approximately 11.51 mph.
Are knots and mph the same?
No. Knots measure nautical miles per hour, while mph measures statute miles per hour. One knot is approximately 1.15078 mph.
How do I convert mph to km/h?
Multiply the speed in mph by 1.609344 to get km/h.
Is this speed converter free?
Yes, you can use this online speed converter for free without installing an app.