Fence Calculator

Ranges are for 6 ft height. 4 ft fences run 20-35% less; 8 ft fences run 25% more. Gate costs are additional.

• Post depth matters: Rule of thumb — 1/3 of total post length underground. In frost zones, go below the frost line or your fence will heave. A 6 ft fence needs 8 ft posts with 2+ ft buried.
• Plan gates before posts: Every fence needs at least one gate wide enough for a wheelbarrow (42" clear). Decide where gates go before setting any posts — moving a concrete-set post is miserable work.
• Talk to the neighbor: In many states, fences on the property line mean shared cost. Get an agreement in writing before you build. Fences cause more neighbor disputes than anything else in residential construction.
• Corner and end posts get extra bracing: These carry the most tension. Use 6x6 posts at corners instead of 4x4, and add diagonal bracing. A corner post that leans takes the whole fence with it.
• Check HOA and setback rules first: Some HOAs dictate material, color, and max height. Most municipalities require the "good side" facing out. A permit is $75-150 and worth every penny compared to a forced tear-down.

• Concrete Calculator — Calculate concrete for post footings, especially if you're setting posts in sono tubes.
• Excavation Calculator — Estimate digging costs if you're hiring out the post hole work or need grading.
• Gravel Calculator — Figure gravel needs for drainage around fence lines or gate aprons.