MPH to KM/H Converter
Type mph to get km/h. 60 mph is about 97 km/h.
60 mph =
96.5606km/h
60 miles per hour is 96.5606 kilometers per hour.
- 1 mph
- 1.6093 km/h
- 1 km/h
- 0.6214 mph
How to convert mph to km/h
Multiply the miles per hour by 1.609344. That number is the length of one mile in kilometers, and it is exact: the international mile is 1,609.344 meters by definition. An hour is an hour on both sides, so only the distance part of the speed changes.
Take a 45 mph rural road: 45 × 1.609344 = 72.42 km/h. A 25 mph school zone works out to 40.23 km/h, which is why it feels close to the 40 km/h zones used in many metric countries.
Speedometers on cars sold in the US and UK show both scales, with km/h as the smaller inner ring. If you rent a car abroad, the outer numbers are the ones the road signs use.
kilometers per hour = miles per hour × 1.609344
- One mile per hour is exactly 0.44704 meters per second, which is 1.609344 km/h. Source: NIST SP 811, Appendix B.8: conversion factors by unit.
- In the UK, the national speed limit for cars on motorways is 70 mph, which is 112.65 km/h. Source: GOV.UK, Speed limits.
How to estimate mph to km/h in your head
Add half, then add another tenth of the original. For 60 mph: half of 60 is 30, a tenth is 6, so 60 + 30 + 6 = 96 km/h, against the true 96.56. The “times 1.6” shortcut is accurate to about half a percent, close enough for any speedometer.
A rougher version for driving: 30 mph is about 50 km/h and 60 mph about 100 km/h. Both are slightly low (48.3 and 96.6), so if you hold the round metric number you will be going a touch faster than the mph figure.
Miles per hour to km/h chart
Common speed limits and road speeds in mph, converted to kilometers per hour.
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 5 | 8.0467 |
| 10 | 16.0934 |
| 15 | 24.1402 |
| 20 | 32.1869 |
| 25 | 40.2336 |
| 30 | 48.2803 |
| 35 | 56.327 |
| 40 | 64.3738 |
| 45 | 72.4205 |
| 50 | 80.4672 |
Show all 18 rowsShow fewer
| 55 | 88.5139 |
| 60 | 96.5606 |
| 65 | 104.607 |
| 70 | 112.654 |
| 75 | 120.7008 |
| 80 | 128.748 |
| 85 | 136.794 |
| 100 | 160.9344 |
Frequently Asked Questions
How fast is 70 mph in km/h?
70 mph is 112.65 km/h (70 × 1.609344). On a dashboard marked in km/h, that sits just past the 110 line.
Is kph the same as km/h?
Yes. kph, km/h and km·h⁻¹ all mean kilometers per hour. The SI way to write it is km/h; “kph” is an informal abbreviation common in news reports and sports.
Why multiply rather than divide?
A mile is longer than a kilometer, so covering a mile each hour means covering more kilometers each hour. The km/h number must come out bigger, which multiplying by 1.609344 does.