Speed Converter (km/h ↔ mph)
Convert speed between kilometers per hour, miles per hour, and meters per second.
How This Speed Converter Works
This tool converts speed between kilometers per hour (km/h), miles per hour (mph), and meters per second (m/s). These units are commonly used in driving, running, physics, and international travel.
Conversions use standard formulas:
km/h to mph: km × 0.621371
mph to km/h: mph ÷ 0.621371
km/h to m/s: km ÷ 3.6
All calculations happen instantly in your browser, ensuring privacy and fast performance.
Frequently Asked Questions
How many mph is 1 km/h?
1 km/h equals 0.621371 mph.
How many km/h is 1 mph?
1 mph equals 1.60934 km/h.
Does the tool store any data?
No. Everything is calculated locally on your device.