Kilometer per Hour → Mile per Hour

Converting kilometers per hour to miles per hour is one of the most common speed conversions. Whether you're working with international measurements, academic research, or everyday calculations, understanding the relationship between kilometers per hour and miles per hour is essential. One kilometer per hour (km/h) equals exactly 0.6213716893 miles per hour (mph), and conversely, one mile per hour equals 1.609342713 kilometers per hour.

This conversion is frequently used in vehicle speed limit understanding when driving abroad and athletic performance tracking. For quick reference: 10 kilometers per hour = 6.213716893 miles per hour, and 100 kilometers per hour = 62.13716893 miles per hour. Our converter above handles any value instantly, including decimal and negative numbers.

The kilometer per hour and mile per hour are both units of speed. The conversion factor between them is constant, making it straightforward to convert in either direction. Other common applications include wind speed interpretation for weather and sailing and engineering and physics calculations.

Use the conversion table below for pre-calculated values, or enter any custom number in the converter above. All calculations are performed with full floating-point precision to ensure accuracy for both everyday use and professional applications. Bookmark this page for quick access whenever you need to convert kilometers per hour to miles per hour.