Fence Calculators

Plan Your Fence Before You Buy

Fencing is one of those projects where material costs add up faster than you'd expect. A 150-foot privacy fence can easily run through 200+ pickets, 25+ posts, and 60+ rails — and that's before you count concrete for the post holes, gate hardware, or stain. Underestimating means a second trip to the lumberyard. Overestimating means a stack of $4 pickets sitting in the garage.

These calculators cover the full fencing workflow: how many posts and how deep to set them, how many pickets and rails you need for the run, what the whole thing will cost, and how much stain to buy when you're ready to finish it. Each one handles multiple fence types — wood, vinyl, chain link, and composite — because the material counts are different for each.

Post spacing is standardized at 8 feet on center for most residential wood fences, per American Wood Council guidelines. Chain link uses different spacing (typically 10 feet between line posts). The calculators apply the correct spacing for each fence type automatically.

Which Calculator Do I Need?

Planning a new wood fence? Start with the Post Depth Calculator to figure out how deep your posts need to go — this depends on fence height, soil conditions, and your local frost line. Then use the main Fence Calculator to get your full materials list: posts, pickets, rails, and fasteners.

Getting quotes or setting a budget? The Cost Calculator gives you a line-item breakdown so you know what to expect before you call a contractor or walk into the lumberyard.

Going with vinyl or chain link? Vinyl fences use pre-assembled panels instead of individual pickets, so the math is different. The Vinyl Calculator handles panel sizing. Chain Link has its own component list: mesh rolls, line posts, terminal posts, tension bars, and ties.

Finishing or re-staining an existing fence? The Stain Calculator covers solid, semi-transparent, and clear finishes, with different coverage rates for each type and rough vs. smooth wood surfaces.

Post Concrete Quick Reference

Every fence post needs concrete to keep it plumb and stable. The standard rule: dig the hole three times the width of the post. A 4×4 post (actual dimension: 3.5 inches) goes in a 10-inch diameter hole. A 6×6 post (5.5 inches actual) needs a 16-inch hole. Use the Concrete Calculator in post hole mode to get exact bag counts for your post count and hole dimensions.

Related Calculators

Fence projects often overlap with other outdoor work. If you're also pouring concrete footings for a gate or structural posts, or laying gravel along the fence line for drainage, those calculators can help you plan the full project.