KM/H to MPH Converter
Convert kilometers per hour to miles per hour as you type, with the exact formula, a full chart and the speed limits you will meet abroad.
Press Calculate to print your slip
1 mile = 1.609344 km exactly. Always follow the posted speed limit.
Want the acceleration too? Open the 0-60 Calculator
On this page
How to convert km/h to mph
One mile is exactly 1.609344 kilometers, a definition fixed by international agreement in 1959. That makes the conversion exact in both directions.
Exact formula
mph = km/h × 0.621371
Mental shortcut
mph ≈ km/h × 5 ÷ 8
- 1 km/h
- 0.621371 mph
- 1 mph
- 1.609344 km/h
- Meters per second
- km/h ÷ 3.6, or mph × 0.44704
- Knots
- km/h ÷ 1.852, or mph × 0.868976
Worked example: 130 km/h × 0.621371 = 80.8 mph. With the shortcut, 130 × 5 ÷ 8 = 81.3 mph, close enough for a road sign.
km/h to mph chart
Common speeds, from city streets to hypercar top speeds.
| km/h | mph | Context |
|---|---|---|
| 10 km/h | 6.2 mph | Cycling or jogging speed |
| 20 km/h | 12.4 mph | Cycling or jogging speed |
| 30 km/h | 18.6 mph | A 30 km/h or 20 mph zone |
| 40 km/h | 24.9 mph | Typical urban limit |
| 50 km/h | 31.1 mph | Typical urban limit |
| 60 km/h | 37.3 mph | Rural road speed |
| 70 km/h | 43.5 mph | Rural road speed |
| 80 km/h | 49.7 mph | Rural road speed |
| 90 km/h | 55.9 mph | Rural road speed |
| 100 km/h | 62.1 mph | Highway speed |
| 110 km/h | 68.4 mph | Highway speed |
| 120 km/h | 74.6 mph | Motorway speed |
| 130 km/h | 80.8 mph | Motorway speed |
| 140 km/h | 87.0 mph | Above almost every speed limit |
| 150 km/h | 93.2 mph | Above almost every speed limit |
| 160 km/h | 99.4 mph | Above almost every speed limit |
| 170 km/h | 105.6 mph | Above almost every speed limit |
| 180 km/h | 111.8 mph | Above almost every speed limit |
| 190 km/h | 118.1 mph | Above almost every speed limit |
| 200 km/h | 124.3 mph | Above almost every speed limit |
| 210 km/h | 130.5 mph | Sports car and supercar territory |
| 220 km/h | 136.7 mph | Sports car and supercar territory |
| 230 km/h | 142.9 mph | Sports car and supercar territory |
| 240 km/h | 149.1 mph | Sports car and supercar territory |
| 250 km/h | 155.3 mph | Sports car and supercar territory |
| 260 km/h | 161.6 mph | Sports car and supercar territory |
| 270 km/h | 167.8 mph | Sports car and supercar territory |
| 280 km/h | 174.0 mph | Sports car and supercar territory |
| 290 km/h | 180.2 mph | Sports car and supercar territory |
| 300 km/h | 186.4 mph | Sports car and supercar territory |
| 320 km/h | 198.8 mph | Hypercar top speeds |
| 350 km/h | 217.5 mph | Hypercar top speeds |
| 400 km/h | 248.5 mph | Hypercar top speeds |
| 414 km/h | 257.2 mph | Hypercar top speeds |
More top-speed conversions
Top speeds on European spec sheets and in record news are quoted in km/h. These are the high numbers people look up most that fall between the rows of the chart above.
| km/h | mph |
|---|---|
| 284 km/h | 176.5 mph |
| 322 km/h | 200.1 mph |
| 330 km/h | 205.1 mph |
| 340 km/h | 211.3 mph |
| 354 km/h | 220.0 mph |
| 380 km/h | 236.1 mph |
| 420 km/h | 261.0 mph |
| 450 km/h | 279.6 mph |
| 500 km/h | 310.7 mph |
Need the other direction? Use the mph to km/h converter. Checking whether your tires are rated for the speed? See the tire speed rating chart.
Speed limits in km/h and mph
Traveling abroad or reading a foreign review? These are the km/h limits you will meet most often. Limits vary by country and road, so always follow the signs.
| Limit | In mph | Where you'll see it |
|---|---|---|
| 30 km/h | 18.6 mph | City-center and school zones in many countries |
| 50 km/h | 31.1 mph | The default urban limit in most of Europe and Australia |
| 80 km/h | 49.7 mph | Rural roads in many countries |
| 100 km/h | 62.1 mph | Rural highways in Canada and many other countries |
| 110 km/h | 68.4 mph | Major highways in Australia and parts of Canada |
| 120 km/h | 74.6 mph | Motorways in Spain and several other countries |
| 130 km/h | 80.8 mph | Motorways in France, Italy and Austria |
Speeds in car specs
0-60 mph vs 0-100 km/h
100 km/h is 62.1 mph, so a 0-100 km/h time runs about 5% longer than the same car's 0-60 mph time. Our 0-60 calculator shows both.
Tire speed ratings
Ratings are set in km/h and converted: H is 210 km/h (130 mph), V 240 km/h (149 mph), Y 300 km/h (186 mph). See the tire speed rating chart.
Top speeds
European spec sheets quote top speed in km/h. 250 km/h (155 mph) is a common electronic limit on German performance cars.
kph, km/h and kmh
All three mean kilometers per hour. km/h is the official form; "km" alone is a distance, not a speed.
Sources and method
One international mile is exactly 1.609344 km, so 1 km/h = 0.621371 mph. Nothing on this page is estimated.
Updated September 2026. Built and checked by the 0-60calc Team. Found a mistake? Tell us and we will check it against the source.
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Questions people ask
How do I convert km/h to mph?
Multiply the speed in km/h by 0.621371. For example, 100 km/h × 0.621371 = 62.1 mph. For a quick estimate in your head, multiply by 5 and divide by 8.
Is 100 km/h the same as 60 mph?
Almost. 100 km/h is 62.1 mph, so it's a little faster than 60 mph. That's why 0-100 km/h times run slightly longer than 0-60 mph times.
How fast is 120 km/h in mph?
120 km/h is 74.6 mph, close to the 75 mph limit on many US interstates.
How fast is 300 km/h in mph?
300 km/h is 186.4 mph, which is exactly where the Y tire speed rating tops out.
Is kph the same as km/h?
Yes. km/h, kph and kmh all mean kilometers per hour. km/h is the official SI form; kph is common in the UK and US.
Why does my speedometer show both km/h and mph?
Cars are sold across markets that use different units, so many speedometers print both scales. Digital dashboards usually let you switch in the settings menu.