What is a linear foot of fence?

A foot measured along the fence line — length only, no width or height. A 150 ft run is 150 linear feet whatever the fence height; height only matters for surface jobs like staining.

Is a fence bid in lineal feet the same as linear feet?

Yes — lineal and linear feet are the same unit. Contractors and lumber yards use the words interchangeably, so compare a per-lineal-foot bid directly against a per-linear-foot one.

How many linear feet of fence for 1 acre?

A square acre needs about 835 linear feet (4 × √43,560). A long, narrow acre needs more — the cost-to-fence-an-acre tool converts your real dimensions.

Do I subtract the gate from the linear feet?

For per-foot pricing, no — keep the opening in the line total and add each gate as its own line item (posts, leaf and hardware). That is how quotes itemize it, and how the installation cost estimator is built.

How to measure a fence in linear feet

Every fence quote, calculator and material count starts from one measurement: the line in linear feet. Here is how to take it correctly — and what “linear” (or “lineal”) actually means.

By Francesco Zinghinì

Fencing is priced and planned by length, not area. Get the linear-foot figure right and every downstream number — posts, panels, pickets, dollars — follows from it; get it wrong and every number inherits the error. The measurement takes twenty minutes with a tape or wheel.

What a linear foot is (and “linear” vs “lineal”)

A linear foot is just a foot measured along a line — no width, no height, no area. A 150-foot fence line is 150 linear feet whether the fence is 4 ft or 6 ft tall. “Lineal” means exactly the same thing: some contractors and lumber yards write lineal feet (lf), others linear feet — a fence bid quoted per lineal foot is a per-linear-foot bid, full stop. Square feet only enter the picture for surface jobs like staining, where face area = length × height.

How to measure the line

Walk the boundary you intend to fence and confirm it is the real line — a surveyor or your plat settles any doubt; a fence on the neighbor’s side of the line is their fence.
Break the run into straight segments between corners and direction changes. Measure each segment along the ground with a tape or measuring wheel and write it down.
Add the segments. The sum is your fence line in linear feet.
Note every corner, end and gate as you go — they do not change the length, but each adds a post and each gate is its own line item on a quote.

Measure along the ground: on a slope the ground distance is what the fence actually covers, and it is slightly longer than the flat map distance. Round each segment up to the next foot.

Worked example — a fenced backyard

A rectangular backyard fenced on three sides (the house closes the fourth): two sides of 60 ft and a back run of 100 ft, with one 4 ft walk gate in a side run:

Line: 60 + 100 + 60 = 220 linear feet
Corners: 2 · Ends: 2 (where the fence meets the house) · Gates: 1
The gate opening stays in the 220 ft for pricing per foot — the gate is added as its own package on top, which is how the installation cost estimator itemizes it.

Feed 220 lf into the fence calculator and the posts, rails, pickets and concrete all come out in one pass.

From an acre (or any area) to linear feet

If you only know the lot size, convert area to perimeter. For a square lot:

side = √area, so perimeter = 4 × √area

One acre is 43,560 sq ft → a square acre is ~208.7 ft on a side → about 835 linear feet of fence. Two acres in a square is ~1,181 lf — not double, because perimeter grows with the square root of area. A long, narrow lot of the same area needs more fence than a square one; the cost-to-fence-an-acre tool handles both the square assumption and your real length × width.

From linear feet to a budget

Once the line is measured, a per-foot price turns it into money:

total = line (lf) × your $/lf + gates + tear-out ± extras

Enter the rate from your own quote in the fence cost per linear foot tool — and read what that per-foot rate includes before comparing two bids. When a bid says lineal feet, compare it directly against a linear-foot bid: they are the same unit.

Common measuring mistakes

Measuring the lot, not the fence. Fence only the sides you are actually building — shared or house-closed sides drop out of the line.
Using the flat plan distance on a slope. The ground is longer; measure along it.
Confusing sheet or panel width with coverage. Panels and corrugated sheets count by net coverage width — see the panel calculator.
Forgetting the extras. Corners, ends and gates each add a post even though they add no length.
Reporting square feet. A “1,200 sq ft fence” is a stain quantity, not a fence length — quotes want linear (lineal) feet.

This is a measuring guide, not a survey or a bid. Confirm the boundary with your plat or a licensed surveyor and local ordinance before setting posts on it, call 811 before you dig, and get itemized written quotes per linear foot from licensed, insured fencing contractors.

For the background behind these numbers, see International Code Council; for day-to-day trade practice, American Fence Association.