Arrows (FOC)
Calculate Arrows (FOC) instantly with the exact formula and a worked example.
Arrows (FOC)
Arrow length (L)cm
Nock to balance point (A)cm
FOC
10%
Assessment
Within the typical 7–15% range
Balance offset from center
7.4cm
More about: Arrows (FOC)
What it calculates
The “Arrows (FOC)” calculator computes FOC in % from 2 parameters: arrow length (l) (cm), nock to balance point (a) (cm).
A handy everyday calculator for daily tasks.
Example calculation
With parameters Arrow length (L) = 74 cm, Nock to balance point (A) = 44.4 cm the result is 10 % (Easton method; hunting arrows often use 10–15%).
How to use
- Enter arrow length (l) and nock to balance point (a) — each field above is adjustable with a slider.
- FOC (%) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Arrows (FOC) calculated?
The Arrows (FOC) calculator computes FOC (in %) from arrow length (l), nock to balance point (a). Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Arrows (FOC) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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