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How Many mph in 1 ft/s? 1 ft/s ≈ 0.681818 mph

1 foot per second equals about 0.681818 miles per hour (exactly 15/22). Ballistics and physics answer with converter links.

Question

How many miles per hour are in one foot per second?

1 foot per second (ft/s) equals approximately 0.681818 mph (exactly 15/22).

1 ft/s

≈ 0.681818 mph

Formula

mph = ft/s × 15/22

100 ft/s

≈ 68.182 mph

Explanation

There are 5280 feet in a mile and 3600 seconds in an hour, so mph = ft/s × 3600 ÷ 5280 = ft/s × 15/22.

Multiply mph by 22/15 to get ft/s.

Example: 100 ft/s ≈ 68.182 mph.

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