How to Measure for a Fence

What You'll Need

• 100-foot tape measure (200-foot for large properties)
• Stakes or marking flags to mark corners and direction changes
• Notepad or phone to record each segment
• A helper — measuring alone is slow and inaccurate
• Optional: string line or chalk line to mark the fence path

Step 1 — Walk the Fence Line and Mark Corners

Before measuring anything, walk the entire perimeter where you want the fence to go. Place a stake or flag at:

• Every corner (any place the fence changes direction)
• Every gate opening (mark both sides of the opening)
• Any spot where terrain drops or rises significantly

Standard single gates are 3–4 feet wide; double (drive-through) gates are 8–12 feet wide. Decide gate widths before measuring so you can mark them accurately.

Step 2 — Measure Each Segment Separately

Pull the tape between each pair of stakes and record every segment individually. Do not try to measure one continuous run around corners — you'll get an inaccurate result.

Record each segment separately — our fence calculator has a multi-segment mode so you can enter them one by one. The total material count automatically covers all segments.

Step 3 — Account for Corners and Gates

Corners: Each inside or outside corner adds a post. Corner posts are typically set first as anchor points, then line posts are spaced between them. Make sure your post count from the calculator reflects corner posts — our calculator handles this automatically.

Gates: Each gate requires two dedicated gate posts (heavier than line posts to handle the swing load) plus gate hardware: hinges, a latch, and optionally an auto-close spring.

• Single swing gate (3–4 ft): leave 3.5–4.5 ft between posts for clearance
• Double gate (8–12 ft): leave 1–2 inches per side for clearance when both panels are open
• Do not subtract gate openings from your total linear footage — gate posts still need to be set in the ground

Step 4 — Check for Slopes and Grade Changes

A flat yard is simple. A sloped yard requires a decision: build a stepped fence or a raked fence.

• Stepped fence: Fence panels are level, stepping down like stairs as the grade drops. Each step requires cutting rails and posts to different heights. Measure the horizontal run and the vertical drop of each step.
• Raked fence: The fence follows the slope of the ground continuously. Rails are cut at an angle. More complex to build but no visual gaps at the bottom.

For significant slopes (more than 1 foot of drop per 8 feet of run), add 5–10% to your material estimate. Longer posts are needed where the fence steps down, and additional picket cuts create more waste.

Step 5 — Verify Your Property Lines

This step is often skipped and often regretted. Never assume your fence line is your actual property line.

• Check your property survey or plat map — available at your county recorder or assessor's office, often online for free
• Look for iron survey pins at corners (metal stakes driven into the ground, sometimes with an orange flag)
• Setting a fence on a neighbor's property creates legal liability and may require removal at your expense
• If you're unsure, hire a licensed surveyor ($300–$700) — far less than the cost of moving a finished fence

Step 6 — Enter Measurements into the Fence Calculator

Once you have your segment measurements and gate count, you're ready to get your full materials list:

1. Enter each segment's length in the calculator (add segments with the "+ Add Segment" button)
2. Enter the number of gates
3. Select your fence style (wood picket, privacy, split rail, chain link)
4. Set your post spacing (8 ft is standard) and fence height
5. The calculator outputs posts, rails, pickets, and concrete bags — plus an optional cost estimate

Frequently Asked Questions