Speed Converter 2026 | km/h ↔ mph ↔ m/s ↔ knots ↔ Mach | Global Tool

A Speed Converter helps you convert between speed units such as kilometers per hour (km/h), miles per hour (mph), meters per second (m/s), feet per second (ft/s), and knots (kn). It is useful for driving speed limits, travel planning, aviation and marine measurements, sports timing, and engineering calculations.

km/h (kilometers per hour) is a metric unit used in most countries worldwide. mph (miles per hour) is mainly used in the USA and the UK for road speed limits. A speed converter helps compare driving speeds between regions, especially for international travel and global vehicle specifications.

To convert kilometers per hour (km/h) to miles per hour (mph), multiply by 0.621371. Example: 100 km/h ≈ 62.14 mph. This is one of the most common speed conversions globally.

To convert miles per hour (mph) to kilometers per hour (km/h), multiply by 1.60934. Example: 60 mph ≈ 96.56 km/h. This conversion is useful when comparing speed limits and vehicle performance internationally.

m/s (meters per second) is the SI unit of speed and is widely used in physics, engineering, and scientific calculations. It is also commonly used for wind speed, motion analysis, and academic work. Compared to km/h and mph, m/s is more suitable for technical accuracy.

To convert meters per second (m/s) to kilometers per hour (km/h), multiply by 3.6. Example: 10 m/s = 36 km/h. This conversion is common in science and engineering contexts.

A knot (kn) is a speed unit mainly used in aviation, navigation, and marine travel. 1 knot equals 1 nautical mile per hour. Pilots and ship navigation systems commonly use knots instead of km/h or mph.

1 knot equals approximately 1.852 km/h or 1.15078 mph. Example: 20 knots ≈ 37.04 km/h or ≈ 23.02 mph. This is useful for interpreting wind speeds, flight data, and marine reports.

Small differences usually occur due to rounding. Some converters show fewer decimal places, while others show more precision. The underlying conversion factors are standardized internationally, so results should match closely when rounded to the same precision.

Yes. This tool uses internationally accepted conversion factors for speed units (metric, imperial, and nautical). Results are accurate for everyday use, travel planning, and educational reference. For scientific or engineering documentation, use the required decimal precision and official standards.

Yes. Speed conversions are universal and this converter is designed for global use across India, USA, UK, Canada, Australia, UAE, Europe, and other regions. It helps compare speed limits, vehicle specs, and travel speeds across different unit systems.