55 MPH to KM/H
55 miles per hour equals approximately 88.51 kilometers per hour.
How to use this tool
- Enter miles per hour in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your kilometers per hour and the full breakdown beneath it.
55 mph converts to about 88.5 km/h, the national speed limit used in the US during the 1970s and still common on many state highways.
Frequently asked questions
- How do I convert miles per hour to kilometers per hour?
- Multiply the number of miles per hour by 1.60934 to get kilometers per hour.