How many is
Conversion between units of measurement
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You can easily convert 420 feet per minute into miles per hour using each unit definition:

Feet per minute
ft/min = 0.00508 m / s
Miles per hour
mile/hr = 0.44704 m / s

With this information, you can calculate the quantity of miles per hour 420 feet per minute is equal to.

¿How many mph are there in 420 fpm?

In 420 fpm there are 4.7727273 mph.

Which is the same to say that 420 feet per minute is 4.7727273 miles per hour.

Four hundred twenty feet per minute equals to four miles per hour. *Approximation

¿What is the inverse calculation between 1 mile per hour and 420 feet per minute?

Performing the inverse calculation of the relationship between units, we obtain that 1 mile per hour is 0.20952381 times 420 feet per minute.

A mile per hour is zero times four hundred twenty feet per minute. *Approximation

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