This simple chart is a quick way to give a value for wind. With three steps you can use this chart.
Step 1: Know your distance to target, with the array of modern range finders this should be a snap
Step 2: A full value of wind is 10 mph at 90 degrees to the muzzle. So to put it simply 1 MOA or MIL of wind is 10 mph at 90 degrees to the muzzle.
Step 3: Know the actual wind speed. This can be difficult without a wind meter but the Beufort scale can give you some tips on judging wind between you and the target.
Step 4: Calculate, using the two charts one can determine wind speed and the value of hold in for a given distance.
This is a quick reference guide to help you get ready for hunting, the best way to learn how to judge wind is to get out and shoot. Practice makes perfect. Understand that the longer the shot the more drift. This is a simple beginner level introduction, there are a-lot of other factors to shooting but this is an important skill to learn and this is a great way to start.
Good Luck and Good Shooting