The speed converter is a free online tool that helps you convert between common units quickly and accurately. It supports 5 units including Meter per Second (m/s), Kilometer per Hour (km/h), Mile per Hour (mph), Knot (kn), Foot per Second (ft/s). The core conversion formula is: 1 m/s = 3.6 km/h = 2.23694 mph. For example, 1 Meter per Second equals approximately 3.6 Kilometer per Hour. Conversely, 1 Kilometer per Hour equals approximately 0.277778 Meter per Second. Common conversions: 5 m/s = 18 km/h, 10 m/s = 36 km/h, 25 m/s = 90 km/h, 50 m/s = 180 km/h, 100 m/s = 360 km/h. This converter is useful for students, engineers, scientists, and professionals who need accurate common unit conversions. Whether you are working on homework, technical specifications, research data, or everyday measurements, this tool provides instant, reliable results. All conversions are calculated relative to a single base unit for consistency and precision across all supported units. A knot is one nautical mile per hour and is used in maritime and aviation. The speed of light is approximately 299,792,458 meters per second.