F.O.C. (Front of Center) CALCULATOR

To accurately calculate the Front of Center (F.O.C.) of your hunting arrow, start by assembling the complete arrow setup—including your arrows cut to proper length and all components you plan to use: broadhead or point, vanes, insert, nock, and any additional hardware(arrow wraps, nock bushings, etc).

To calculate your arrow’s kinetic energy, you’ll need two key measurements:

1. Total Arrow Length

(throat of nock to end of shaft, in INCHES)

DO NOT include the point.

2. Balance Point Length

(throat of nock to balance point, in INCHES)

Find the arrow’s balance point by locating where it balances perfectly on your finger.






Ideal F.O.C. Ranges by use case

Target Archery


Recommended F.O.C.: 7%–10%

A lower F.O.C. provides a flatter trajectory and faster arrow recovery in flight—ideal for consistent target performance.

Hunting


Recommended F.O.C.: 10%–15%

A moderate F.O.C. offers better arrow stability and deeper penetration, especially important when hitting bone or tough tissue.

High-Penetration / Heavy Setup Hunting


Recommended F.O.C.: 15%–20%+

Higher F.O.C. setups are popular for big game or high-momentum builds (e.g., using heavy inserts or broadheads). They enhance front-end stability and increase punch-through power—but can reduce long-range forgiveness.

Key Considerations

-Too Low: Arrows may fishtail or plane in flight, reducing accuracy.

- Too High: Arrows may drop more quickly and be more affected by wind drift at long distances.