20+ Calculate Bow Speed. Then, divide the result by 60 to get the speed in. For the most accurate results, it is best to use a known speed and known arrow weight under 6 grain per pound to determine your “corrected” ibo value.

Also compare different setups to find best. Arrow speed calculator is specifically programmed to. To calculate the bow speed (bs), multiply 2, pi (π), the radius of the bow’s rotation (r), and the frequency of rotation (f).








