1moa = 1 in at 100yds + or ~ , 1 moa at 200 yds = 2 in. 1 moa at 300 yds = 3 in. Etc.
So if a bullet drops 3 moa at 300 yds the drop would be 9 in. Hope this helps.
If you use 1 MOA to 1 Inch ant 100 yards you will be off about 5 inches or 5 percent, not good. 1 MOA equals 1.0472 inches (rounded) at 100 yards. Pleanty if accurate info out ther just search MOA to Inches conversion.
Moa to inches
One MOA, 1⁄60 of that, measures 1.047 inches. While 1 MOA at 100 yards equals 1.047 inches, at 200 yards it equals 2.094 inches (2 x 1.047). To calculate MOA at any distance, multiply 1.047 by the distance in yards and divide by 100. On riflescopes with 1⁄4-MOA adjustments, each click equals .261 inch at 100 yards.