Spike's Calculators

Calculate the revolutions per minute from a given speed in miles per hour.

diameter = 34.6 inches

convert the speed of miles per hour to inches per minute

there are 63360 inches in one mile and 60 minutes in an hour

148 miles per hour = 148 ÷ 60 = 2.4667 miles per minute

2.4667 miles per minute = 2.4667 * 63360 = 156,288 inches per minute

Circumference = diameter * pi pi = 3.14159...........34.6 * 3.14159 = 108.699

Divide the speed of 156,288 inches per minute by the circumference of the wheel to get the revolutions per minute: 156,288 ÷ 108.699 = 1437.8

At a speed of 148 miles per hour, a wheel with a diameter of 34.6 inches will make 1437.8 revolutions per minute assuming no loss due to friction or load.

- speed in miles per hour
- diameter in inches

- circumference in inches
- revolutions per minute

- Distance from Speed and Time - Miles
- Distance from Speed and Time - Kilometres
- Average Speed from Distance in Kilometres and Time
- Average Speed in Kilometres per Hour
- Average Speed in Miles per Hour
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