Arrow Weight
0 grains
FOC stands for Forward of Center balance point. This measurement results from the relative weights of the components used in the arrow: shaft, insert, head, fletching and nock. A properly balanced arrow measurements of 7 to 10%.
Use the straight-line distance to the target. This is the distance needed for the calculation. In this example, a guesstimated angle of 45 degrees and a 28 yard straight line distance will require an aiming distance of 19.8 yards. Remember, it doesn't matter if the angle is up or down, the answer is still the same.
Angle (up or down) | ||||||||
Straight Line
Distance in yards |
10° | 15° | 20° | 25° | 30° | 35° | 40° | 45° |
5 yards | 4.9 | 4.8 | 4.7 | 4.5 | 4.3 | 4.1 | 3.8 | 3.5 |
10 yards | 9.8 | 9.7 | 9.4 | 9.1 | 8.7 | 8.2 | 7.7 | 7.1 |
15 yards | 14.8 | 14.5 | 14.1 | 13.6 | 13.0 | 12.3 | 11.5 | 10.6 |
20 yards | 19.7 | 19.3 | 18.8 | 18.1 | 17.3 | 16.4 | 15.3 | 14.1 |
25 yards | 24.6 | 24.1 | 23.5 | 22.7 | 21.7 | 20.5 | 19.2 | 17.7 |
30 yards | 29.5 | 29.0 | 28.2 | 27.2 | 26.0 | 24.6 | 23.0 | 21.2 |
35 yards | 34.5 | 33.8 | 32.9 | 31.7 | 30.3 | 28.7 | 26.8 | 24.7 |
40 yards | 39.4 | 38.6 | 37.6 | 36.3 | 34.6 | 32.8 | 30.6 | 28.3 |
45 yards | 44.3 | 43.5 | 42.3 | 40.8 | 39.0 | 36.9 | 34.5 | 31.8 |
50 yards | 49.2 | 48.3 | 47.0 | 45.3 | 43.3 | 41.0 | 38.3 | 35.4 |
55 yards | 54.2 | 53.1 | 51.7 | 49.8 | 47.6 | 45.1 | 42.1 | 38.9 |
60 yards | 59.1 | 58.0 | 56.4 | 54.4 | 52.0 | 49.1 | 46.0 | 42.4 |
65 yards | 64.0 | 62.8 | 61.1 | 58.9 | 56.3 | 53.2 | 49.8 | 46.0 |
70 yards | 68.9 | 67.6 | 65.8 | 63.4 | 60.6 | 57.3 | 53.6 | 49.5 |
75 yards | 73.9 | 72.4 | 70.5 | 68.0 | 65.0 | 61.4 | 57.5 | 53.0 |
80 yards | 78.8 | 77.3 | 75.2 | 72.5 | 69.3 | 65.5 | 61.3 | 56.6 |