Speed Conversion Guide: Velocity and Rate Measurements

Speed conversions are essential for international travel, physics, aviation, and understanding speed limits across different countries.

Popular Speed Conversions

• [Miles per Hour to Kilometers per Hour](/speed/mile-per-hour-to-kilometer-per-hour)
• [Kilometers per Hour to Miles per Hour](/speed/kilometer-per-hour-to-mile-per-hour)
• [Knots to Miles per Hour](/speed/knot-to-mile-per-hour)
• [Meters per Second to Kilometers per Hour](/speed/meter-per-second-to-kilometer-per-hour)

Quick Reference

• 1 mph = 1.609 km/h = 0.447 m/s
• 1 km/h = 0.621 mph = 0.278 m/s
• 1 m/s = 3.6 km/h = 2.237 mph
• 1 knot = 1.852 km/h = 1.151 mph

Common speed limits:

• 30 mph = 48 km/h (residential)
• 55 mph = 89 km/h (rural)
• 70 mph = 113 km/h (highway)

Use our speed converters for travel planning!