How do I calculate linear feet for an aluminum fence?

Measure each straight run of the fence line separately and add them together. Subtract any gate opening widths. Example: three runs of 30, 50, and 30 ft (110 total) minus a 4-ft gate = 106 linear feet of fence needed. Always add 5–10% for measurement errors or unusable panel ends.

How many fence panels do I need for 100 linear feet?

With standard 6-foot panels: 100 ÷ 6 = 16.67 → order 17 panels. For 4-foot panels: 100 ÷ 4 = 25 panels. Post count = panels + 1: 17 panels = 18 posts (plus additional posts for gates and corners). Always add 1–2 extra panels for mistakes or future repairs.

Should I measure on a slope or horizontally for aluminum fence?

Measure along the actual slope (along the ground surface) for ordering purposes, not the horizontal distance. Panels must physically span the slope length. If your slope rises 3 feet over a 30-foot horizontal run, the actual slope length is √(30² + 3²) = 30.15 feet — nearly identical in this case. For steep slopes (10%+), the difference becomes more significant.

How wide should my fence gate be?

Walk gates: 3–4 feet wide (allows comfortable passage, wheelbarrows, mowers). Double drive gates: 10–12 feet wide for standard vehicles, 14–16 feet for trucks or RVs. Match gate width to your widest intended use. Gate frames require extra posts and hardware — plan gate locations before measuring fence runs.

How to Measure a Yard for an Aluminum Fence: Step-by-Step Linear Footage

Learn how to accurately measure your yard perimeter for an aluminum fence installation. Covers measuring tools, corner calculations, gate placement, and how to convert measurements to fence panels.

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What You Need to Measure

Before ordering aluminum fence materials, you need: 1. Total linear footage: The perimeter length you want to fence 2. Gate locations: Number, width, and placement of gates 3. Post spacing: Standard aluminum fence uses 72-96 inch post spacing (6–8 ft) 4. Height: Fence height affects panel and post selection

Step-by-Step Measuring Process

Tools needed: - 100-foot measuring tape (or wheel measurer for large areas) - Graph paper and pencil for sketching - Stakes (optional, for marking corners)

Step 1: Walk the Perimeter

Walk the full intended fence line and note any: - Corners (sharp angles change post requirements) - Gates (deduct gate width from fence run) - Terrain changes (slopes require racked panels or step-down installation) - Obstacles (trees, utility boxes, HVAC units)

Step 2: Measure Each Run

Measure each straight section between corners. Write down each measurement separately: - North run: 45 ft - East run: 80 ft - South run: 45 ft - West run: 80 ft (total: 250 linear feet)

Account for gates: Subtract gate opening widths from the runs where gates will be placed. A 4-foot gate opening means 4 feet less of fence in that run.

Step 3: Calculate Total Linear Footage

Total Fence = Sum of All Runs − Gate Widths

Example: - Total perimeter: 250 ft - One 4-ft walk gate: −4 ft - One 10-ft double drive gate: −10 ft - Net fence needed: 236 linear feet

Converting Linear Footage to Fence Panels and Posts

Standard aluminum fence panels are 6 feet wide (some manufacturers use 4-foot or 8-foot panels).

Panels needed = Total Linear Footage ÷ Panel Width For 6-foot panels: 236 ÷ 6 = 39.3 panels → order 40 panels

Posts needed = Panels + 1 + Extra for gates For 40 panels, 2 gates (4 gate posts total): 40 + 1 + 4 = 45 posts

Handling Slopes

Aluminum fencing on slopes can be installed two ways: 1. Racked: Panels follow the ground slope continuously — best for gradual slopes 2. Stepped: Panels remain level in steps down the slope — creates a stair-step pattern

For racked installation, measure along the slope (not horizontal) to get the correct panel length needed.

Irregular Lot Shapes

For non-rectangular yards: - Measure each leg of the polygon separately - Sum all measurements - Sketch the layout to identify corner count (corner posts needed = number of corners + 1 for start/end)

A triangular yard (3 corners) needs at least 4 posts. An L-shaped yard (5 corners) needs at least 6 posts plus any gate posts.

Pre-Order Checklist

Before ordering, verify: - [ ] Total linear footage measured (multiple measurements for accuracy) - [ ] Gate locations and widths confirmed - [ ] Number of corners counted - [ ] Slope areas identified (racked vs. stepped) - [ ] Local codes checked (height restrictions near property lines, pool fence requirements) - [ ] Utility locates completed (call 811 before digging post holes)

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Frequently Asked Questions

How do I calculate linear feet for an aluminum fence?: Measure each straight run of the fence line separately and add them together. Subtract any gate opening widths. Example: three runs of 30, 50, and 30 ft (110 total) minus a 4-ft gate = 106 linear feet of fence needed. Always add 5–10% for measurement errors or unusable panel ends.
How many fence panels do I need for 100 linear feet?: With standard 6-foot panels: 100 ÷ 6 = 16.67 → order 17 panels. For 4-foot panels: 100 ÷ 4 = 25 panels. Post count = panels + 1: 17 panels = 18 posts (plus additional posts for gates and corners). Always add 1–2 extra panels for mistakes or future repairs.
Should I measure on a slope or horizontally for aluminum fence?: Measure along the actual slope (along the ground surface) for ordering purposes, not the horizontal distance. Panels must physically span the slope length. If your slope rises 3 feet over a 30-foot horizontal run, the actual slope length is √(30² + 3²) = 30.15 feet — nearly identical in this case. For steep slopes (10%+), the difference becomes more significant.
How wide should my fence gate be?: Walk gates: 3–4 feet wide (allows comfortable passage, wheelbarrows, mowers). Double drive gates: 10–12 feet wide for standard vehicles, 14–16 feet for trucks or RVs. Match gate width to your widest intended use. Gate frames require extra posts and hardware — plan gate locations before measuring fence runs.

Last updated 7/28/2026