Kinetic Energy & FOC Calculators

Kinetic Energy

Enter required information below to calculate your Kinetic Energy. For more information on understanding kinetic energy and to see formulas click here.

Arrow Weight and FOC (forward of Center Balance)

Enter required information below to calculate your finished arrow weight and FOC.

FOC stands for Front of Center balance point. This measurement results from the relative weights of the components used in the arrow: shaft, insert, point, fletching and nock. A properly balanced arrow measurements of 7 to 15%. For more information on understanding arrow weight and FOC click here.

Weight of one vane in grains
Length of one vane