This may help folks.
One MOA Calculation
How to determine one MOA for any target. Note, MOA = minute of angle.
Example:
The one MOA = 1” is an ARC measurement and not a straight line as it is a very small section, 1” of the overall circle circumference at 100 yards.
A trivia note – one MOA on the moon is about 69.5 miles, 111.85 Kilometers! (238,900 miles, 384,472.28 Kilometers to the moon).
One MOA Calculation
How to determine one MOA for any target. Note, MOA = minute of angle.
- Calculate the distance to the target.
- Convert this number to inches or centimeters for metric.
- Double this number, (Diameter of a circle).
- Use Pi, 3.14159 times the number in step 3, (Circumference of a circle is Pi x D).
- Divide this number by 21,600, (Note 21,600 = minutes in a circle, 360 degrees x 60 minutes in one degree).
Example:
- 100 yards to target.
- 100 x 3’ x 12” = 3600” to target.
- 3600” x 2 = 7200”, (Diameter of 100 yard circle in inches).
- Pi 3.14159 x 7200” = 22,619.448”, (Circumference of 100 yard circle).
- 22,619.448”/21,600 = 1.04719”, (One MOA at 100 yards in inches).
The one MOA = 1” is an ARC measurement and not a straight line as it is a very small section, 1” of the overall circle circumference at 100 yards.
A trivia note – one MOA on the moon is about 69.5 miles, 111.85 Kilometers! (238,900 miles, 384,472.28 Kilometers to the moon).
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