Arrow FOC Calculator

How to find the Front of Center (FOC) for your arrow? The Arrow FOC Calculator helps you determine this with easily. Enter the arrow length and balance point to find the FOC percentage. Read post to know what the Arrow FOC Calculator is and how to use it.

What is Arrow FOC?

Arrow FOC stands for Front of Center. It is a measurement that indicates how much of the arrow’s weight is located towards the front. A higher FOC means more weight at the front, which can affect the arrow’s flight and accuracy.

How to Use FOC

Using the Arrow FOC Calculator is simple. Follow these steps:

1. Enter Total Arrow Length: Input the arrow length in inches.
2. Enter Distance to Balance Point: Input the distance to the balance point in inches.
3. Click Calculate: Press the “Calculate FOC” button to get the result.

Example Inputs:

• Total Arrow Length: 30 inches
• Distance to Balance Point: 18 inches

Click “Calculate FOC” to see the FOC percentage.

How to Calculate Arrow FOC

The formula to calculate FOC is:

$\text{FOC} = \left( \frac{\text{Distance to Balance Point} - \left(\frac{\text{Total Arrow Length}}{2}\right)}{\text{Total Arrow Length}} \right) \times 100$

Variable	Description
Total Arrow Length	The length of the arrow in inches
Distance to Balance Point	The distance from the nock to the balance point in inches

Calculation Example 1:

1. Step 1: Enter the total arrow length (30 inches).

2. Step 2: Enter the distance to the balance point (18 inches).

3. Step 3: Apply the formula.

    

   $$\text{FOC} = \left( \frac{18 – \left(\frac{30}{2}\right)}{30} \right) \times 100$$

    

4. Step 4: Simplify inside the parentheses.

    

   $$\text{FOC} = \left( \frac{18 – 15}{30} \right) \times 100$$

    

5. Step 5: Perform the subtraction.

    

   $$\text{FOC} = \left( \frac{3}{30} \right) \times 100$$

    

6. Step 6: Divide and multiply by 100.

    

   $$\text{FOC} = 0.1 \times 100 = 10\%$$

    

The FOC percentage is 10%.

Calculation Example 2:

1. Step 1: Enter the total arrow length (28 inches).

2. Step 2: Enter the distance to the balance point (16 inches).

3. Step 3: Apply the formula.

    

   $$\text{FOC} = \left( \frac{16 – \left(\frac{28}{2}\right)}{28} \right) \times 100$$

    

4. Step 4: Simplify inside the parentheses.

    

   $$\text{FOC} = \left( \frac{16 – 14}{28} \right) \times 100$$

    

5. Step 5: Perform the subtraction.

    

   $$\text{FOC} = \left( \frac{2}{28} \right) \times 100$$

    

6. Step 6: Divide and multiply by 100.

    

   $$\text{FOC} = 0.0714 \times 100 = 7.14\%$$

    

The FOC percentage is 7.14%.

Final Words

The Arrow FOC Calculator is a valuable tool for archers who want to optimize their arrow performance. By entering the total arrow length and the distance to the balance point, you can quickly calculate the FOC percentage.