Instantly convert miles per hour to kilometers per hour and other speed units. Accurate, bidirectional, with step-by-step solutions and common speed reference table.
Enter a speed in miles per hour (MPH) to convert to kilometers per hour and other units.
Enter a speed in kilometers per hour (KMH) to convert to miles per hour and other units.
| Activity | MPH | KM/H | m/s | Knots |
|---|---|---|---|---|
| 🚶 Walking speed | 3.1 mph | 5.0 km/h | 1.4 m/s | 2.7 kn |
| 🏃 Jogging speed | 6.2 mph | 10.0 km/h | 2.8 m/s | 5.4 kn |
| 🏃 Running speed | 9.3 mph | 15.0 km/h | 4.2 m/s | 8.1 kn |
| 🚲 Cycling speed | 12.4 mph | 20.0 km/h | 5.6 m/s | 10.8 kn |
| 🏙️ City speed limit (typical) | 25 mph | 40.2 km/h | 11.2 m/s | 21.7 kn |
| 🛣️ Suburban road limit | 35 mph | 56.3 km/h | 15.6 m/s | 30.4 kn |
| 🛣️ Highway speed (US) | 55 mph | 88.5 km/h | 24.6 m/s | 47.8 kn |
| 🛣️ Expressway speed (US) | 65 mph | 104.6 km/h | 29.1 m/s | 56.5 kn |
| 🏎️ Highway speed (Europe) | 130 km/h | 130.0 km/h | 36.1 m/s | 70.2 kn |
| 🚄 High-speed train | 186.4 mph | 300.0 km/h | 83.3 m/s | 162.0 kn |
Quick reference for converting common speeds from miles per hour to kilometers per hour and other units.
| MPH | KM/H | m/s | Knots | ft/s |
|---|---|---|---|---|
| 5 mph | 8.05 km/h | 2.24 m/s | 4.34 kn | 7.33 ft/s |
| 10 mph | 16.09 km/h | 4.47 m/s | 8.69 kn | 14.67 ft/s |
| 15 mph | 24.14 km/h | 6.71 m/s | 13.03 kn | 22.00 ft/s |
| 20 mph | 32.19 km/h | 8.94 m/s | 17.38 kn | 29.33 ft/s |
| 25 mph | 40.23 km/h | 11.18 m/s | 21.72 kn | 36.67 ft/s |
| 30 mph | 48.28 km/h | 13.41 m/s | 26.07 kn | 44.00 ft/s |
| 35 mph | 56.33 km/h | 15.65 m/s | 30.41 kn | 51.33 ft/s |
| 40 mph | 64.37 km/h | 17.88 m/s | 34.76 kn | 58.67 ft/s |
| 45 mph | 72.42 km/h | 20.12 m/s | 39.10 kn | 66.00 ft/s |
| 50 mph | 80.47 km/h | 22.35 m/s | 43.45 kn | 73.33 ft/s |
| 55 mph | 88.51 km/h | 24.59 m/s | 47.79 kn | 80.67 ft/s |
| 60 mph | 96.56 km/h | 26.82 m/s | 52.14 kn | 88.00 ft/s |
| 65 mph | 104.61 km/h | 29.06 m/s | 56.48 kn | 95.33 ft/s |
| 70 mph | 112.65 km/h | 31.29 m/s | 60.83 kn | 102.67 ft/s |
| 75 mph | 120.70 km/h | 33.53 m/s | 65.17 kn | 110.00 ft/s |
| 80 mph | 128.75 km/h | 35.76 m/s | 69.52 kn | 117.33 ft/s |
| 85 mph | 136.79 km/h | 38.00 m/s | 73.87 kn | 124.67 ft/s |
| 90 mph | 144.84 km/h | 40.23 m/s | 78.21 kn | 132.00 ft/s |
| 95 mph | 152.89 km/h | 42.47 m/s | 82.56 kn | 139.33 ft/s |
| 100 mph | 160.93 km/h | 44.70 m/s | 86.90 kn | 146.67 ft/s |
Quick reference for converting common speeds from kilometers per hour to miles per hour.
| KM/H | MPH | m/s | Knots |
|---|---|---|---|
| 5 km/h | 3.11 mph | 1.39 m/s | 2.70 kn |
| 10 km/h | 6.21 mph | 2.78 m/s | 5.40 kn |
| 20 km/h | 12.43 mph | 5.56 m/s | 10.80 kn |
| 30 km/h | 18.64 mph | 8.33 m/s | 16.20 kn |
| 40 km/h | 24.85 mph | 11.11 m/s | 21.60 kn |
| 50 km/h | 31.07 mph | 13.89 m/s | 27.00 kn |
| 60 km/h | 37.28 mph | 16.67 m/s | 32.40 kn |
| 70 km/h | 43.50 mph | 19.44 m/s | 37.80 kn |
| 80 km/h | 49.71 mph | 22.22 m/s | 43.20 kn |
| 90 km/h | 55.92 mph | 25.00 m/s | 48.60 kn |
| 100 km/h | 62.14 mph | 27.78 m/s | 54.00 kn |
| 110 km/h | 68.35 mph | 30.56 m/s | 59.40 kn |
| 120 km/h | 74.56 mph | 33.33 m/s | 64.80 kn |
| 130 km/h | 80.78 mph | 36.11 m/s | 70.20 kn |
| 140 km/h | 86.99 mph | 38.89 m/s | 75.60 kn |
| 150 km/h | 93.21 mph | 41.67 m/s | 81.00 kn |
| 200 km/h | 124.27 mph | 55.56 m/s | 108.00 kn |
| 250 km/h | 155.34 mph | 69.44 m/s | 135.00 kn |
| 300 km/h | 186.41 mph | 83.33 m/s | 162.00 kn |
Our converter also shows the equivalent speed in other common units:
1 MPH = 0.44704 m/s. Multiply MPH by 0.44704 to get m/s. This is the SI unit of speed used in physics and science.
1 MPH = 0.868976 kn. Multiply MPH by 0.868976 to get knots. Knots are used in aviation and maritime navigation.
1 MPH = 1.46667 ft/s. Multiply MPH by 1.46667 to get ft/s. Commonly used in engineering and ballistics.
One mile equals exactly 1,609.344 meters (1.609344 km). The conversion factor comes from this fundamental relationship between imperial and metric distance units.
For a quick mental conversion, multiply MPH by 1.6 to get KMH. For example, 60 mph × 1.6 ≈ 96 km/h (actual: 96.56 km/h).
To estimate KMH to MPH, divide by 1.6 or multiply by 0.6. For example, 100 km/h ÷ 1.6 ≈ 62.5 mph (actual: 62.14 mph).
US highways: 55-70 mph (89-113 km/h). European highways: 100-130 km/h (62-81 mph). UK motorways: 70 mph (113 km/h).
When driving abroad, use this converter to understand local speed limits. A 30 mph zone in the UK is about 48 km/h — a common European city speed.
Miles per hour (MPH) and kilometers per hour (KMH or km/h) are two different units for measuring speed. MPH is part of the imperial system, used primarily in the United States, the United Kingdom, and a few other countries. KMH is part of the metric system, used in most countries around the world including Europe, Canada, Australia, and Asia.
The key difference is the underlying distance unit: a mile is approximately 1,609 meters, while a kilometer is exactly 1,000 meters. This means one mile is about 1.609 times longer than one kilometer. Therefore, a speed in MPH will always be a smaller number than the equivalent speed in KMH — for example, 60 mph equals about 96.6 km/h. Our converter handles this conversion instantly with high precision.
The choice between MPH and KMH depends on where you live or where you're driving. In the United States, speed limits are posted in MPH, and car speedometers show MPH as the primary unit. In most other countries, speed limits are in KMH. UK vehicles show MPH on their speedometers (since the UK uses MPH for road speeds despite being metric for most other measurements). When traveling between countries, it's essential to understand both units to avoid speeding tickets and drive safely. Our bidirectional converter makes it easy to switch between the two systems.
Converting between MPH and KMH is useful in many everyday situations:
When driving a US car in Europe (or vice versa), you need to understand the local speed limits. US speedometers typically show MPH, while European roads use KMH signs.
Compare car top speeds and acceleration times between US and international automotive reviews. A car's top speed listed in mph vs km/h can be confusing without conversion.
Convert running, cycling, and walking speeds between units. Many treadmills and fitness apps let you choose between MPH and KMH for pace tracking.
While aviation uses knots as the standard, pilots and sailors often need to convert to MPH or KMH for weather reports, ground speed, and regulatory compliance.
Physics and engineering problems often require converting between speed units. Understanding the relationship between MPH, KMH, m/s, and knots is fundamental to kinematics.
Hurricane and storm wind speeds are reported in different units depending on the region. US reports use MPH, while most international reports use KMH or knots.