Home
Back
FOC Calculation Formula:
| From: | To: |
FOC (Front of Center) is a measurement that indicates the balance point of an arrow. It represents the percentage of the arrow's total weight that is located in the front half of the arrow, which affects the arrow's flight characteristics and stability.
The calculator uses the FOC calculation formula:
Where:
Explanation: The formula calculates the percentage of the arrow's total weight that is concentrated in the front portion, which influences the arrow's balance and flight performance.
Details: Proper FOC is crucial for arrow stability, accuracy, and penetration. Arrows with higher FOC percentages typically fly better and penetrate deeper, while arrows with lower FOC may be less stable in flight.
Tips: Enter the weight of forward components and total arrow weight in grains. Both values must be positive numbers, and the forward weight cannot exceed the total weight.
Q1: What is considered a good FOC percentage for arrows?
A: Most archers aim for 10-15% FOC for target shooting and 12-20% for hunting applications, though optimal FOC can vary based on arrow setup and personal preference.
Q2: How do I measure the forward weight of my arrow?
A: The forward weight typically includes the point, insert, and any additional weight added to the front of the arrow shaft.
Q3: Why is FOC important for arrow performance?
A: Proper FOC helps arrows fly straight, recover quickly from the archer's paradox, and maintain energy for better penetration upon impact.
Q4: Can FOC be too high?
A: Yes, excessively high FOC can make arrows too front-heavy, potentially reducing speed and causing clearance issues with arrow rests or bows.
Q5: How can I adjust my arrow's FOC?
A: You can adjust FOC by changing point weight, adding weight tubes, using heavier inserts, or switching to different fletching configurations.