Calculation of angular minute or MOA for riflescopes
Calculation of angular minute or MOA for optical sights
1 MOA (one Angular minute or Minute Of Angle) is 1/60th of a Angular degree.
With a distance to the target of 100 m corresponds to the adjustment by 1 MOA thus an adjustment by 2.9 cm.
Sample calculation for understanding:
The target distance (= radius): 100m or 10,000cm
Circumference calculation: 2 x radius x 3.14 (PI) = 628.31m or 62,831.85 cm
- 1 degree then corresponds to 1/360 of the circumference of the circle: 1.745m or 174.53 cm
- 1 MOA then corresponds to 1/60 of a degree: 0.029m or 2.908882 cm
- 1/4 MOA is therefore 0.72722 cm per click per 100m (7.3 mm/click per 100 m)
- 1/8 MOA is therefore 0.36361 cm per click per 100m (3.6 mm/click per 100 m)
Click table MOA values for metres
| 1/8 MOA | Adjustment 1 click = 1/8 MOA | |||||||||
| Shooting range in metres | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 |
| Deviation in mm | 3,6 | 7,3 | 10,9 | 14,5 | 18,2 | 21,8 | 25,5 | 29,1 | 32,7 | 36,4 |
| 1/4 MOA | Adjustment 1 click = 1/4 MOA | |||||||||
| Shooting range in metres | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 |
| Deviation in mm | 7,3 | 14,5 | 21,8 | 29,1 | 36,4 | 43,6 | 50,9 | 58,2 | 65,5 | 72,7 |
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