CDN Farm Boy
Veteran Member
I've tried water levels and unless you have all day to wait for them to settle, the garden hose is better left in the garden. In my opinion, they aren't worth the price even if they are free.
Bruce has the starting of the most simple option. Rather than trying to level at the top of the posts, work elbow high from the ground. All you need is a reference point on each post. Put a single nail one post at comfortable working height. Rest 1 end of the STRAIGHT 2x4 on this nail. Go to the other post, lift up the 2x4 with your level sitting on top of it and mark the bottom. This mark and the nail are now level with each other. Measure up the short post from the nail and transfer this to the other post and cut. You only need to ladder one post doing it this way.
The advantage of this is that you have an easy to find reference mark if you want to hinge gates.
Bruce has the starting of the most simple option. Rather than trying to level at the top of the posts, work elbow high from the ground. All you need is a reference point on each post. Put a single nail one post at comfortable working height. Rest 1 end of the STRAIGHT 2x4 on this nail. Go to the other post, lift up the 2x4 with your level sitting on top of it and mark the bottom. This mark and the nail are now level with each other. Measure up the short post from the nail and transfer this to the other post and cut. You only need to ladder one post doing it this way.
The advantage of this is that you have an easy to find reference mark if you want to hinge gates.