Speed Converter

Speed Converter

Convert speed values between miles per hour, kilometers per hour, meters per second, knots, and feet per second.

Capabilities

• Five units: mph, kph, m/s, knots, ft/s.
• All-at-once: Omit the target unit to see conversions to every supported unit.
• Mach number: Every result includes the equivalent Mach number at sea level (speed of sound = 343 m/s).

Gotchas

• Non-negative only: Speed values must be zero or positive.
• Mach at sea level: The Mach number assumes standard atmosphere at sea level. At altitude, the speed of sound decreases.
• Precision: Results rounded to 4 decimal places.