Archery Formulas - Bookmark this page!

Try this out.

Enter both the Total AMO SShaft length and the Noc to Balance Point values and hit the Calculate button.

Try different values and see what effects they have on FOC.

FOC Calculator


Enter AMO Total Length AND Nock to Balance Point
then press the "Calculate" button:

Arrow Length

Nock to Balance Point

AMO FOC
( % FOC )



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Momentum and KE Calculator
Enter both the weight and velocity values and hit the Calculate button.

Try different values and see what effect arrow wieght and velocity have on Momentum.

Kinetic Energy / Momentum Calculator

Enter Arrow Weight AND Arrow Velocity then press the "Calculate" button:

Arrow Weight (grains)

Arrow Velocity
(ft./sec.)

Kinetic Energy
(ft.lbs.)

Momentum
(Slugs or lb.ft.-sec)



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Mechanical Advantage Calculator

Enter both the Total Overall Width and Length of One Cutting Edge and hit the Calculate button.

Mechanical Advantage Calculator

Total Overall Width and Length of One Cutting Edge then press the "Calculate" button:

Broadhead Overall Width

Cutting Edge Length



Double Blade MA

Triple Blade MA

Four Blade MA

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Angle of Attack Calculator

 

Length AC

Length AB
(half the overall width)

Tangent





 

Angle Tangent ° ° Angle Tangent ° ° Angle Tangent
0 0.0000 30 0.5773 60 1.7317
1 0.0175 31 0.6008 61 1.8037
2 0.0349 32 0.6248 62 1.8804
3 0.0524 33 0.6493 63 1.9622
4 0.0699 34 0.6744 64 2.0499
5 0.0875 35 0.7001 65 2.1440
6 0.1051 36 0.7265 66 2.2455
7 0.1228 37 0.7535 67 2.3553
8 0.1405 38 0.7812 68 2.4745
9 0.1584 39 0.8097 69 2.6044
10 0.1763 40 0.8390 70 2.7467
11 0.1944 41 0.8692 71 2.9033
12 0.2125 42 0.9003 72 3.0767
13 0.2309 43 0.9324 73 3.2698
14 0.2493 44 0.9656 74 3.4862
15 0.2679 45 1.0000 75 3.7306
16 0.2867 46 1.0354 76 4.0091
17 0.3057 47 1.0722 77 4.3295
18 0.3249 48 1.1105 78 4.7023
19 0.3443 49 1.1502 79 5.1418
20 0.3639 50 1.1916 80 5.6679
21 0.3838 51 1.2347 81 6.3095
22 0.4040 52 1.2798 82 7.1099
23 0.4244 53 1.3269 83 8.1372
24 0.4452 54 1.3762 84 9.5045
25 0.4663 55 1.4279 85 11.4157
26 0.4877 56 1.4823 86 14.2780
27 0.5095 57 1.5396 87 19.0404
28 0.5317 58 1.6001 88 28.5437
29 0.5543 59 1.6640 89 56.9168