Kinetic Energy and Momentum Calculator
FOC CalculatorSee Arrow FOC (Front of Center) Basics and How to Calculate It for more details on front of center.
1) Measure the length of the shaft from the throat of the nock to the end of the shaft, excluding the insert, this is L
2) Using a sharp edge, balance the arrow (including the point) and mark the balance point
3) Measure the distance from the throat of the nock to the balance point, this is B
The second method replaces the total length of the arrow, including the point, for the (L) value.