mph to km/h converter
One mile per hour is exactly 1.609344 km/h. To convert mph to km/h, multiply the speed by 1.609344.
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60 miles per hour =
96.5606km/h
Formula: km/h = mph × 1.609344
Show the steps
- Definition: 1 mph = 1.609344 km/h = 0.44704 m/s exactly; 1 km/h = 1000 m / 3600 s
- 60 mph × 1.609344 = 96.5606 km/h
Definitions used: 1 mph = 1.609344 km/h = 0.44704 m/s exactly; 1 km/h = 1000 m / 3600 s.
Source: NIST SP 811, Appendix B.8, checked on .
How to convert miles per hour to kilometers per hour
Multiply the value in miles per hour by 1.609344. The factor follows from the definitions: 1 mph = 1.609344 km/h = 0.44704 m/s exactly, and 1 km/h = 1000 m / 3600 s.
km/h = mph × 1.609344
Worked example: 60 mph to km/h
- Definition: 1 mph = 1.609344 km/h = 0.44704 m/s exactly; 1 km/h = 1000 m / 3600 s
- 60 mph × 1.609344 = 96.5606 km/h
- Answer: 60 mph = 96.5606 km/h.
Miles per hour to kilometers per hour chart
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 5 | 8.04672 |
| 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 |
| 55 | 88.5139 |
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 60 | 96.5606 |
| 65 | 104.607 |
| 70 | 112.654 |
| 75 | 120.701 |
| 80 | 128.748 |
| 90 | 144.841 |
| 100 | 160.934 |
| 120 | 193.121 |
| 150 | 241.402 |
| 200 | 321.869 |
Values rounded to 6 significant digits. Type any other number in the converter at the top of the page.
What is 60 mph in km/h?
60 mph is 96.561 km/h. 30 mph is 48.28 km/h, 70 mph is 112.65 km/h and 100 mph is 160.93 km/h.
How do you convert mph to km/h while driving?
Add 60% to the mph figure: take the speed, add half of it, then add a tenth of it. 50 mph → 50 + 25 + 5 = 80 km/h (exact: 80.467).
More questions about miles per hour and kilometers per hour
How many mph is 100 km/h?
100 km/h is 62.137 mph.
How many mph is 120 km/h?
120 km/h is 74.565 mph.
How fast is 1 mph in meters per second?
Exactly 0.44704 m/s.
Is a knot the same as a mile per hour?
No. A knot is one nautical mile per hour, 1.852 km/h, about 15% faster than 1 mph. Convert knots on the speed page.
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Sources and limits
- NIST SP 811, Appendix B.8
NIST Special Publication 811, Guide for the Use of the SI, Appendix B.8: Factors for Units Listed Alphabetically (page updated August 18, 2025).
National Institute of Standards and Technology. Edition or effective date: . Text in force when checked on .
This is a calculation aid, not an official measurement service. Results are rounded to 6 significant digits for display. For trade, engineering, medical dosing or legal documents, confirm the figure in the official source. Nothing you type leaves your browser.