Eight foot gate how far apart do you place the posts for the gate?

Answer 1

Metal Gate & Posts: 96 inches plus 3 inches for barrel hinge plus 1 inch for clearance at non hinged post if hinge is mounted INSIDE between the posts. If a flat hinge is flat mounted on outside of post and gate, instead of 3 inches, use the width of the hinge ferrell (the raised ridge in the middle where the two sides of the hinge pivot).
Wooden Gate & Posts: Same.
If the hinges are mounted inside between the posts the above distances will let the gate swing 90 degrees or slightly less depending on the thickness of the post and the gate material. If you want to have gate swing a little further, either mount barrel hinges toward one side of the post or increase the hinge distance from 3 inches to a distance sufficient to permit the edge of the gate to clear the width of the post as it opens.