Post holes: 12 inch diameter, 30-36 inches deep for fence posts. Bury 1/3 of post length minimum, below frost line in cold climates. One 50lb bag fills 0.45 cubic feet. Use 3x post width for hole diameter: 12 inch hole for 4x4 post.
Quick Tips
- Always order 10-15% extra materials for waste
- Check local building codes before starting
- Measure twice, cut once — verify all inputs
Frequently Asked Questions
Bury 1/3 of post length, minimum 30 inches, below frost line (36-48 inches cold climates).
Use 3x post width: 12 inch hole for 4x4 post, 9 inch for 3 inch round post.
Two 50lb bags for typical 12 inch diameter x 30 inch deep hole.