1. Convert the cutting speed of the blade to feet per minute. If the speed is given in inches per second, multiply it by 5 to get feet per minute. If the speed is given in meters
http://www.ehow.com/how_8105584_calculatecutters...

Plug your numbers into this equation (i'm not sure if it will work, but it makes sense. Let. r = RPM. c = Circumference (in whatever unit of measurement you want) d = Distance (in
http://wiki.answers.com/Q/How_do_calculate_roller_...

Look at the horsepower curve for your car (Googling for "Subaru WRX dyno" for instance usually works). Shift when you get more horsepower in the next gear than the current
http://www.quora.com/HowcanIcalculatebestrpm...

Rotations per minute. Calculated by figuring out how many times an object rotates about a center point in one minute. For example, say a tire rotates 4 complete times in 15 seconds.
http://answers.yahoo.com/question/index?qid=201111...
