1 mil is 3.6 inches at 100 yards
1/10 mil is .36 inches (rather than the 1/4 inch of a MOA)
3/10 mil is just over an inch at 100 (1.08 to be exact)
Therefore
1 mil is 36 inches at 1000 yards
1/10 mil is 3.6 inches at 1000 yards
What more do you need? : )