Feet per Second Calculator
Convert mph, km/h, knots, or Mach to feet per second (fps) and back — bidirectional, all speed units at once.
Velocity & Speed Unit Converter
MPH, km/h, Meters/sec, Knots, and Mach speeds.
Feet per Second Speed Conversion Mathematics
Feet per second calculator converts mph, km/h, knots, or Mach into feet per second (fps) and back — all speed units at once.
One mile is 5,280 feet, and one hour is 3,600 seconds — multiplying mph by that ratio converts to feet per second.
- 1Enter a speed and select its unit (mph, km/h, knots, or Mach).
- 2View the converted value across every speed unit simultaneously, including feet per second.
A car travels at 60 mph — how many feet does it cover per second?
Frequently Asked Questions (FAQ)
Feet per second is often more useful for short-timeframe physics calculations — like stopping distance, projectile motion, or reaction time — where feet and seconds are more natural units than miles and hours.
Divide fps by 1.467 to get mph (the inverse of multiplying mph by 5,280/3,600 ≈ 1.467).
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