Convert mph to kph
Printmph to kph Conversion Table
| Miles per Hour (mph) | Kilometers per Hour (kph) |
|---|---|
| 1 mph | 1.609344 kph |
| 5 mph | 8.04672 kph |
| 10 mph | 16.09344 kph |
| 20 mph | 32.18688 kph |
| 30 mph | 48.28032 kph |
| 50 mph | 80.4672 kph |
| 60 mph | 96.56064 kph |
| 70 mph | 112.65408 kph |
| 80 mph | 128.74752 kph |
| 100 mph | 160.9344 kph |
Miles per hour (mph) is the standard speed measurement unit used in the United States and the United Kingdom, while kilometers per hour (km/h or kph) is the official speed standard across virtually every other country worldwide. Converting between mph and kph is critical for international drivers adjusting to foreign highway speed limits, aviation and maritime navigation, meteorology wind tracking, and athletics.
Our free online mph to kph Converter provides high-precision speed conversions across all units:
- Miles per Hour to Kilometers per Hour: Multiply mph by
1.609344(or multiply by8/5). - Kilometers per Hour to Miles per Hour: Multiply km/h by
0.62137119(or multiply by5/8). - Miles per Hour to Meters per Second (m/s): Multiply mph by
0.44704. - Miles per Hour to Knots (kn): Multiply mph by
0.86897624.
mph to kph Formula & Mental Math Shortcut
The international statute mile is defined as exactly 1,609.344 meters (1.609344 kilometers). Therefore, the conversion formula is:
Speed in km/h = Speed in mph × 1.609344
Mental Math Rule (Fibonacci & 8/5 Method)
To quickly convert mph to km/h while driving without a calculator:
- Multiply by 1.6: Add half of the speed, then add 10%. (e.g. for
60 mph:60 + 30 = 90; 10% of 60 is6→90 + 6 = 96 km/h). - Fibonacci Sequence Shortcut: Consecutive Fibonacci numbers match mph-to-kph ratios almost perfectly:
5 mph ≈ 8 km/h30 mph ≈ 50 km/h50 mph ≈ 80 km/h80 mph ≈ 130 km/h
Global Highway & Road Speed Limit Conversion Reference
When driving abroad, road speed limits change between miles and kilometers. Use this comparison table for common international driving benchmarks:
| US / UK Speed Limit (mph) | Exact km/h Equivalent | Posted Metric Sign Equivalent | Standard Road Type / Benchmark |
|---|---|---|---|
| 15 mph | 24.14 km/h | 25 km/h | School zone / residential alley |
| 20 mph | 32.19 km/h | 30 km/h | UK city center / pedestrian urban zone |
| 25 mph | 40.23 km/h | 40 km/h | Standard US residential city street |
| 30 mph | 48.28 km/h | 50 km/h | Standard UK/EU urban built-up area limit |
| 45 mph | 72.42 km/h | 70 km/h | Suburban multi-lane arterial boulevard |
| 55 mph | 88.51 km/h | 90 km/h | US secondary highway / rural two-lane road |
| 60 mph | 96.56 km/h | 100 km/h | UK single carriageway limit |
| 65 mph | 104.61 km/h | 100 – 110 km/h | US interstate standard highway |
| 70 mph | 112.65 km/h | 110 – 120 km/h | UK motorway limit / US high-speed interstate |
| 75 mph | 120.70 km/h | 120 km/h | US Western state interstate limit |
| 80 mph | 128.75 km/h | 130 km/h | French / Italian Autoroute maximum limit |
mph to kph Master Speed Lookup Table (5 to 200 mph)
| Miles per Hour (mph) | Kilometers per Hour (km/h) | Meters per Second (m/s) | Knots (kn) |
|---|---|---|---|
| 5 mph | 8.05 km/h | 2.24 m/s | 4.34 kn |
| 10 mph | 16.09 km/h | 4.47 m/s | 8.69 kn |
| 15 mph | 24.14 km/h | 6.71 m/s | 13.03 kn |
| 20 mph | 32.19 km/h | 8.94 m/s | 17.38 kn |
| 25 mph | 40.23 km/h | 11.18 m/s | 21.72 kn |
| 30 mph | 48.28 km/h | 13.41 m/s | 26.07 kn |
| 35 mph | 56.33 km/h | 15.65 m/s | 30.41 kn |
| 40 mph | 64.37 km/h | 17.88 m/s | 34.76 kn |
| 50 mph | 80.47 km/h | 22.35 m/s | 43.45 kn |
| 55 mph | 88.51 km/h | 24.59 m/s | 47.79 kn |
| 60 mph | 96.56 km/h | 26.82 m/s | 52.14 kn |
| 65 mph | 104.61 km/h | 29.06 m/s | 56.48 kn |
| 70 mph | 112.65 km/h | 31.29 m/s | 60.83 kn |
| 75 mph | 120.70 km/h | 33.53 m/s | 65.17 kn |
| 80 mph | 128.75 km/h | 35.76 m/s | 69.52 kn |
| 90 mph | 144.84 km/h | 40.23 m/s | 78.21 kn |
| 100 mph | 160.93 km/h | 44.70 m/s | 86.90 kn |
| 120 mph | 193.12 km/h | 53.64 m/s | 104.28 kn |
| 150 mph | 241.40 km/h | 67.06 m/s | 130.35 kn |
| 200 mph | 321.87 km/h | 89.41 m/s | 173.80 kn |
Related Speed and Distance Calculators
Need to convert speed back or calculate travel distances? Explore our connected tools:
- kph to mph Converter — Convert Kilometers per Hour to Miles per Hour.
- Speed Converter — Comprehensive multi-unit speed converter (m/s, knots, ft/s, Mach).
- Pace Calculator — Calculate running pace per mile and per kilometer.
- Conversion Calculator — Universal conversion calculator across all physical categories.
Frequently Asked Questions (FAQ)
How many km/h is 1 mph?
1 mile per hour (mph) is equal to exactly 1.609344 kilometers per hour (km/h).
How fast is 70 mph in km/h?
70 mph is equal to 112.65 km/h.
How do you convert 100 km/h to mph?
Multiply by 0.62137: 100 × 0.621371 = 62.14 mph.
Is kph the same as km/h?
Yes. “kph” (kilometres per hour) is an informal English abbreviation, while “km/h” is the official International System of Units (SI) symbol. Both represent the exact same measurement.