1. What is the Arrow Method FOC Calculation?

The Front of Center (FOC) percentage is a measurement of an arrow's balance point relative to its total length. It helps archers determine the optimal weight distribution for their arrows.

2. How Does the Calculator Work?

The calculator uses the Arrow Method FOC formula:

Where:

• \( L \) — Total arrow length (inches)
• \( AMO \) — Balance point from nock end (inches)

Explanation: The formula calculates what percentage of the arrow's total length is in front of the center point.

3. Importance of FOC Calculation

Details: Proper FOC affects arrow flight stability, accuracy, and penetration. Most target arrows have 7-15% FOC, while hunting arrows typically have 10-20%.

4. Using the Calculator

Tips: Measure arrow length from nock groove to end of shaft (not including point). Measure balance point by finding where the arrow balances on a narrow edge.

5. Frequently Asked Questions (FAQ)

Q1: What is considered a good FOC percentage?
A: For target shooting, 7-15% is typical. For hunting, 10-20% provides better penetration.

Q2: How does FOC affect arrow flight?
A: Higher FOC makes arrows more stable but slower. Lower FOC makes arrows faster but less stable.

Q3: Should I include the point when measuring length?
A: Yes, measure total length including point but excluding nock.

Q4: How can I adjust FOC?
A: Add weight to front (heavier points) to increase FOC, or add weight to rear (heavier nocks) to decrease FOC.

Q5: Does FOC affect bow tuning?
A: Yes, FOC affects arrow spine requirements and may require adjustments to your bow setup.