Gold Tip FOC Calculator

Before you build the arrow, the calculator finds front of center. Simply plug in your point weights and shaft details and let the tool do the math. No more guesswork for balance points.

So what is front of center? It is how far forward the balance point of the arrow are from the geometric midpoint of the arrow. If an arrow was perfecty balanced it would have zero percent front of center. The tip weighs down the arrow, which adds weight forward. That weight help the nose get through air. It also stabilizes the arrow to make it fly straight and help it recover quicker from archer’s paradox. Too much front of center will cause the arrow to lose elevation too fast at distance. Too little will cause the arrow to fishtail. Find the balance where it flies well but stays stable in the air.

What is Front of Center?

Although the physics is complicated, the math is simple. To determine its balance point, lay the completed arrow down on a flat surface. Mark where the nock touches then measure from this mark to halfway up the arrow’s length. For example, let’s say your 29-inch arrow balances out at 18.5 inches up from the nock; that means it has roughly 4 inches of forebow position ahead of center. Divide that distance by the overall length to get the percent position. The closer the bow position is to dead center, the less the arrow will wander during flight.

Next to spine, this is perhaps the greatest variable. Target shooters generally likes their arrows to have 7 to 10 percent of their weight in the front. For them, flatter trajectory and less drop at long distance are a priority. Hunters generaly like more front of center in the 10 to 15 percent range. They shoots for high front of center most of the time. This provides extra penetration from forward mass. Trajectory is about speed but it’s momentum that gets it done when the arrow connects with animal.

The arrows don’t have to be complete. One cool feature of the calculator is that you can enter multiple component of an arrow. You can also enter their weights and their location on the arrow. Each weight get multiplied by its distance from the butt end. That determines a theoretical balance point. Which comes in handy when ordering parts online, and you want a brass insert all the way to the extreme front of center or so. The heavier the points are, the more they will push the balance forward. The rear nocks and fletchings will pull it back a bit.

Arrow weight and spine affects kinetic energy, which is how much punch an arrow has. But momentum matter more in terms of penetrating power, which considers both weight and direction (front of center). Often, that means a heavy arrow will penetrate better then a light arrow. And that’s where many bowhunters adds weight to their tips. Usually this is done by either adding an insert or changing the weight on the point. Shortening the shaft change the spine, and that messes everything up. So don’t try to fix things quickly by shortening the shaft, you should of just checked first.

After any change, always test the broadheads and field points together to see if they is hitting the same place. If not, you’ve got something out of whack with your balance. “An arrow isn’t just about raw power; it’s about control. An arrow needs to be tuned properly so that it will fly true. It has to have enough forward drive to work as intended when it impacts. It’s a balancing act between patience and physics. When the numbers jibe you have a clean-flying arrow.