Free speed converter to instantly convert between km/h, mph, m/s, knots, and ft/s. Perfect for travel, aviation, sports, and science.
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Whether you're comparing car speeds, running pace, wind velocity, or nautical speeds, our converter handles all common speed units instantly. Perfect for travel, sports, aviation, and scientific work.
Different industries and countries use different speed units. Cars in Europe use km/h while the US uses mph. Aviation and maritime use knots. Scientific work often uses m/s. Understanding these conversions is essential for international communication and accurate calculations.
Key Conversions
1 km/h = 0.621 mph = 0.278 m/sUnderstand speed limits in different countries.
Compare speeds across different activities.
Convert between knots and land-based units.
Convert speed limits when traveling abroad.
Compare running paces in different units.
Convert flight speeds.
Use m/s for physics calculations.
A knot is one nautical mile per hour. Nautical miles are based on Earth's geometry (1 minute of latitude), making them useful for navigation. One knot equals about 1.15 mph or 1.85 km/h.