Feet per second is common in physics and ballistics; miles per hour is the everyday speed unit. Multiply ft/s by about 0.682 to get mph.
Measure speed
Tools that clock it.
Radar speed gun
Clock pitches and vehicles.
Chronograph
Measure projectile velocity.
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Frequently asked questions
How many mph is 1 ft/s?
One foot per second equals 0.681818 mph.
What is the formula?
mph = ft/s × 3600 ÷ 5280, which simplifies to × 0.681818.