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Arrow FOC Calculator

Calculate your arrow's Front of Center (FOC) instantly with our free online Arrow FOC Calculator. Boost accuracy and performance in seconds!

inches
Measured from nock throat to end of shaft (excluding point)
inches
Distance from nock throat to balance point

If you're into archery, you’ve likely heard about FOC, or Front of Center. It’s a small detail that makes a huge difference in how your arrow flies. Whether you're bowhunting or target shooting, having the right FOC can improve your accuracy, consistency, and penetration.

We’ve developed a free and easy Arrow FOC Calculator so you can quickly and accurately calculate the FOC of any arrow setup. You don’t need to be a math genius just enter a few simple measurements and get your result instantly.

What is Arrow FOC?

FOC stands for Front of Center, and it shows how far forward your arrow’s balance point is from the center. In simpler words, it tells you how front-heavy your arrow is. A higher FOC means more weight is toward the front of the arrow.

Why does this matter? Because FOC plays a big role in your arrow’s flight stability and penetration. A good FOC can help your arrow fly straighter, especially at long distances, and it also helps with deeper penetration in hunting situations.

What is the Formula for Arrow FOC?

The calculation for arrow FOC is straightforward:

FOC (%) = [(Balance Point - (Arrow Length ÷ 2)) ÷ Arrow Length] × 100

Let’s break that down:

  • Arrow Length: Measure from the bottom of the nock groove to the end of the shaft (not including the broadhead or field tip).
  • Balance Point: Find where the arrow balances when placed on your finger or an object. Measure from the nock groove to this balance point.

This formula gives you a percentage that represents how far forward the arrow is balanced from its midpoint.

How to Use the Arrow FOC Calculator

Using our FOC calculator arrow tool is super easy:

  1. Measure your arrow length from the groove of the nock to the end of the shaft.
  2. Find the balance point by resting your arrow on something like a pen or finger until it balances evenly.
  3. Measure the distance from the nock groove to the balance point.
  4. Enter both values into our calculator.
  5. Get your FOC result instantly.

That’s it! You now know your arrow’s FOC percentage.

What is the Optimal FOC for Arrows?

Most experts recommend an FOC between 10% and 15% for hunting arrows and 7% to 10% for target arrows. This range gives a nice balance between flight stability and speed.

  • For bowhunting: 12% to 15% FOC is ideal.
  • For long-range accuracy: 15% to 20% FOC can give better downrange flight.
  • For lightweight arrows: Stick to around 10% FOC to maintain speed.

But don’t worry if your FOC is slightly higher or lower every setup and shooter is different.

Is 12% FOC Enough?

Yes, 12% FOC is generally considered a sweet spot for most hunting arrows. It offers good front weight for better flight and penetration, while still maintaining speed. If you’re shooting fixed-blade broadheads, a 12% FOC can help stabilize the arrow better during flight.

Is 18 Percent FOC Good?

Yes, an 18% FOC is very effective, especially for bowhunters using heavy broadheads or arrows designed for deep penetration. It offers better momentum and impact force. However, you might lose some arrow speed. It's a trade-off between speed and penetration.

Final Verdict

If you’re serious about arrow performance, knowing your FOC is a must. It’s a simple number that can drastically improve your results in the field or at the range.

Our Arrow FOC Calculator helps you calculate it quickly and accurately, with no guesswork. Whether you're using Gold Tip, Easton, or any other arrow brand, this tool works for all types. Remember, a well-balanced arrow is a confident shot.

Try the calculator now and optimize your setup for more accurate shots and better performance.

FAQs

What is a good FOC for hunting arrows?

Anywhere between 10% and 15% is ideal for hunting. It gives you great flight stability and solid penetration.

Can a high FOC reduce arrow speed?

Yes, higher FOC means more front-end weight, which can slightly lower speed. But the trade-off is better accuracy and impact.

Does arrow length affect FOC?

Yes, a longer arrow can reduce your FOC percentage if the front weight stays the same. Always measure your exact arrow length when calculating.

Is Easton FOC calculator different?

The calculation method is the same. Easton, Gold Tip, and other brands may just use slightly different tools or layouts, but the formula remains constant.