Fence Calculator

Planning a new fence? This free fence calculator estimates how many posts you’ll need based on your perimeter and post spacing, plus a total material cost estimate.

How the Fence Calculator Works

The Fence Calculator estimates how many posts a fence run needs based on its total length and post spacing, then combines post pricing with a per-linear-foot material rate to give you a total cost estimate. It’s built for quick planning-stage numbers before you get a contractor quote.

Formula: Posts needed = ROUND UP(Total fence length ÷ Post spacing) + 1. Estimated material cost = (Posts needed × Price per post) + (Total fence length × Price per linear ft). The “+1” accounts for the final end post that closes out the run of spacing intervals.

• Total fence length — the full perimeter or run length of fence being built, in feet
• Post spacing — the distance between posts, in feet (commonly 6–8 ft for wood fencing)
• Price per post — the dollar cost of a single fence post
• Price per linear ft — the dollar cost of fencing material per linear foot (rails, pickets, panels, etc.)

Example Scenarios

Fence length (ft)	Post spacing (ft)	Price per post	Price per linear ft	Posts needed	Est. material cost
200	8	$25	$15	26	$3,650
100	8	$25	$15	14	$1,850
150	6	$20	$12	26	$2,320
80	8	$30	$10	11	$1,130
250	10	$25	$18	26	$5,150

Tips for Accurate Estimates from the Fence Calculator

A fence calculator works from perimeter and spacing, so small measuring errors multiply into extra posts or a short order.

• Measure each run along the actual fence line, not the property outline, and subtract gate openings before entering the length into the fence calculator.
• Add posts for every corner, end and gate side. Each needs its own post, often a heavier one, regardless of spacing.
• Check your panel width. Prefabricated panels usually fix the spacing, commonly 6 or 8 feet, so match the fence calculator spacing to the panel.
• Order a couple of spare posts and extra concrete to cover breakage and uneven ground.

Treat the cost as materials only. The fence calculator does not include labor, hardware, gates, tool rental or permit fees, and sloped ground may need stepped or racked panels.

Before digging, have underground utilities marked (in the US, call 811) and check local height and setback rules with your council or HOA. The Wikipedia article on fences covers common styles and materials. Rerun the fence calculator if your final layout changes.

Fence Calculator FAQ

Why does the calculator add one extra post beyond the spacing count?

Post spacing describes the gaps between posts, not the posts themselves. A fence with 3 spacing intervals needs 4 posts to close the run, so the calculator always adds 1 post to the rounded-up spacing count to capture that final end post.

Does this include corner or gate posts?

No — the formula treats the fence length as one continuous straight run. Corners typically need their own dedicated post regardless of spacing, and gate posts are usually larger and priced separately, so add those in manually on top of this estimate.

What’s a typical post spacing for wood versus chain-link fencing?

Wood fences commonly use 6–8 ft spacing between posts, while chain-link fencing can often stretch to 8–10 ft depending on fabric height and wind load. Local codes and fence height also affect the ideal spacing, so check manufacturer specs for your material.

Are permits or labor costs included in the total?

No — this is a materials-only estimate covering posts and per-linear-foot fencing material. Permit fees, labor for digging and setting posts, concrete for footings, and site prep costs are not included and vary widely by location and installer.

How do I measure total fence length around an irregular yard?

Add up the straight-line length of each fence segment separately, including any offsets around obstacles, then enter the combined total as your fence length. Measuring segment by segment is more accurate than estimating one long perimeter figure.

Does the material cost include rails, pickets, or just posts and linear footage?

The linear-foot price is meant to represent your all-in material cost per foot of fence (rails, pickets, or panels), separate from the individual post cost. Enter a linear-foot rate that already reflects what your specific fencing material costs to get an accurate total.

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Related Calculators

Setting fence posts usually means mixing concrete for footings, so the concrete calculator for estimating bags needed per post hole pairs naturally with this one. Building a masonry wall section instead of a fence line? The concrete block calculator for estimating blocks by wall length and height can help, and the square footage calculator for mapping out an irregular yard perimeter is useful for measuring your total run first. For a related estimate, try the Chicken Coop Size Calculator.