Speed Converters

Convert units of speed (the magnitude of velocity).

Popular speed conversions

• Kilometers per hour to miles per hour
• Miles per hour to kilometers per hour
• Meters per second to kilometers per hour
• Kilometers per hour to meters per second
• Knots to kilometers per hour
• Knots to miles per hour
• Miles per hour to feet per second

Units

• Meter per second (m/s)
• Kilometer per hour (km/h)
• Mile per hour (mph)
• Foot per second (ft/s)
• Knot (kn)

Notes and definitions

• The knot is one international nautical mile per hour (1852/3600 m/s ≈ 0.514444 m/s).
• Negative values are accepted to represent velocity along a signed axis.

Sources: NIST Special Publication 811 (Guide for the Use of the SI).

All speed conversions