Use our MPH to KM/H converter to quickly and accurately convert speed from miles per hour (mph) to kilometers per hour (km/h). Enter a speed in the calculator below to instantly find the equivalent value in kilometers per hour.
Convert MPH to KM/H
Enter a speed in miles per hour (mph) to instantly calculate the equivalent speed in kilometers per hour (km/h).
Formula: km/h = mph × 1.609344
How to Convert MPH to KM/H
To convert miles per hour to kilometers per hour, multiply the speed in mph by 1.609344. One mile per hour is exactly equal to 1.609344 kilometers per hour.
Formula
km/h = mph × 1.609344
Example: Convert 60 mph to km/h.
60 × 1.609344 = 96.56064
60 mph = 96.56064 km/h
MPH to KM/H Conversion Chart
| MPH | KM/H |
|---|---|
| 1 | 1.609344 |
| 5 | 8.046720 |
| 10 | 16.093440 |
| 20 | 32.186880 |
| 25 | 40.233600 |
| 30 | 48.280320 |
| 40 | 64.373760 |
| 50 | 80.467200 |
| 55 | 88.513920 |
| 60 | 96.560640 |
| 65 | 104.607360 |
| 70 | 112.654080 |
| 75 | 120.700800 |
| 80 | 128.747520 |
| 100 | 160.934400 |
Common Driving Speeds in MPH and KM/H
MPH to KM/H conversions are especially useful when driving or traveling between countries that use different speed measurements. For quick reference, 30 mph is about 48 km/h, 55 mph is about 89 km/h, 60 mph is about 97 km/h, 65 mph is about 105 km/h, and 70 mph is about 113 km/h. These approximate values can make unfamiliar road signs, speed limits, vehicle specifications, and speedometer readings easier to understand.
For exact values at any speed, use the MPH to KM/H converter above rather than relying on rounded estimates.
Quick MPH to KM/H Estimate
For a quick mental estimate, multiply the speed in mph by 1.6. For example, 50 mph × 1.6 gives approximately 80 km/h. This shortcut is useful for everyday estimates, while the MPH to KM/H converter above uses the exact conversion factor for more precise results.
When You Might Need to Convert MPH to KM/H
You may need to convert mph to km/h when driving internationally, renting a vehicle abroad, comparing speed limits, reading automotive specifications, following weather reports, reviewing running or cycling speeds, or comparing transportation information between countries.
Frequently Asked Questions
How do you convert MPH to KM/H?
Multiply the speed in miles per hour by 1.609344.
How many kilometers per hour is 1 mph?
One mile per hour equals exactly 1.609344 kilometers per hour.
What is 30 mph in km/h?
30 mph equals 48.28032 km/h, or approximately 48.28 km/h.
What is 60 mph in km/h?
60 mph equals 96.56064 km/h, or approximately 96.56 km/h.
What is 70 mph in km/h?
70 mph equals 112.65408 km/h, or approximately 112.65 km/h.
About Miles Per Hour
Miles per hour, abbreviated mph, is a unit of speed that expresses the number of miles traveled in one hour. It is commonly used for road speeds and vehicle speedometers in the United States and some other countries.
About Kilometers Per Hour
Kilometers per hour, written km/h and also commonly searched as kph or kmh, expresses the number of kilometers traveled in one hour. It is widely used for road speeds and transportation measurements in countries that use the metric system.
For additional information about metric measurement and SI units, visit the U.S. National Institute of Standards and Technology (NIST).
Understanding the difference between these speed measurement systems is especially useful when driving, traveling, or comparing vehicle specifications from different countries. Miles per hour (mph) is commonly used for road speeds in the United States, while kilometers per hour (km/h) is standard in most countries that use the metric system. Whether you are reading an unfamiliar speed limit, renting a vehicle abroad, comparing automotive performance, or reviewing transportation information, an accurate mph to km/h conversion helps ensure that you are interpreting the speed correctly.
For fast and accurate results, use our MPH to KM/H converter whenever you need to compare speeds between miles per hour (mph) and kilometers per hour (km/h).
Convert KM/H to MPH
Need to convert the other way? Use our KM/H to MPH converter to quickly convert speed from kilometers per hour (km/h) to miles per hour (mph).
More Speed Converters
Explore more measurement tools in our Speed Converters collection, or browse All Converters.