1. What is Arrow FOC?

Front of Center (FOC) is a measurement that describes how much weight is in the front half of the arrow compared to the rear half. It's expressed as a percentage and affects arrow flight and stability.

2. How Does the Calculator Work?

The calculator uses the 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 improves arrow flight, 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 arrow balances on a narrow edge.

5. Frequently Asked Questions (FAQ)

Q1: What's the ideal FOC for Gold Tip arrows?
A: Gold Tip recommends 10-15% FOC for most hunting applications with their arrows.

Q2: How does FOC affect arrow flight?
A: Higher FOC increases stability but reduces speed. Lower FOC increases speed but may decrease stability.

Q3: Should I include point weight when measuring?
A: Yes, the point is part of the arrow and affects the balance point measurement.

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

Q5: Does FOC affect broadhead flight?
A: Yes, higher FOC (12-20%) generally improves broadhead accuracy and penetration.