Quickly convert speeds between kilometers per hour (km/h), meters per second (m/s), and miles per hour (mph) with this free online tool. Useful for athletes, drivers, engineers, and students.
Enter a speed value and select the original unit to see its equivalent in all three units.
Learn how to measure speed correctly →
Kilometers per hour, meters per second, and miles per hour are common units used globally to measure speed. Km/h and m/s are widely used in scientific and international contexts, while mph is standard in the United States and the United Kingdom.
This converter helps you quickly translate speeds across these units, essential for travel, sports, physics, and engineering. It’s fast, browser-based, and requires no downloads.