Whether you’re shopping for trim for your living room, planning the line of fencing that goes around your backyard, or shipping cargo using trucks, knowing what a linear foot is can save you money and prevent expensive missteps.
This article will go into detail on linear feet, what it means compared to area-based measurements, and methods of calculating it.
How Long Is a Linear Foot?
Linear foot emphasizes measurement in a straight line rather than measuring area or volume. In reality, one linear foot is equal to one foot of length (12 inches or 30.48 cm) in a row, namely, on a straight line.
If you’re purchasing materials such as trim, molding, rope, piping, baseboards, fence panels, or other materials like such, the width and depth may remain roughly the same, but it’s how long the piece is that matters.
For example, if you buy 10 linear feet of baseboard, it doesn’t matter how tall or thick it is; only the length counts. That’s what makes “linear feet” different from area-based measurements.
How Do You Calculate a Linear Foot?
When you are working on a project and hear a person talking about how to calculate linear feet, you’re actually referring to measuring length in a straight line, never more, never less.
We now know that linear feet to feet is the same. The linear foot is just a fancy way of saying one foot in length, 12 inches, or about 30.48 centimeters. To put the measurement into practice, here is how you do it:
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Measure the length of the piece you’re working with in feet (and inches, if necessary). For example, a board measures 8 feet 4 inches from end to end.
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Convert inches to feet if you measured partly in inches. For instance, 4 inches = 4/12 = 0.333 ft, so 8 ft 4 in becomes 8.333 ft of linear footage.
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If there are multiple segments, then total these segments. If you have two boards, one 8.333 ft and another 6.5 ft, you could get 14.833 feet total.
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Since feet only measure length, there’s no need to multiply by width or height like you would for square or cubic measurements.
Quick Example
You’re putting baseboards around a room. One wall measures 12 ft long, the next is 10 ft, the next comes up to 12 ft, and the last is 10 ft. The total linear footage of baseboard you require: 12 + 10 + 12 + 10 = a total of 44 linear feet.
Tips for Accurate Linear Feet Measurement
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Use the most reliable tape measure and measure each wall or section individually, rather than estimating.
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Convert inches to feet early to maintain steady units.
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Confirm corners, uneven walls, or transitions where you might need shorter sections.
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Make allowances for openings or gaps if you’re measuring around doors or windows and need only trim length. If you want an accurate number, you need to subtract the opening a bit.
Linear Feet in Shipping
Carriers can also price their shipments on the length of floor space taken up, besides weight or volume. They use linear feet calculation to find out how much room freight really takes up in a truck or trailer.
How to Calculate Linear Feet for Freight?
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Count how many pallets (in palletized freight) you have.
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Divide by 2 (to estimate rows if pallets aren’t stacked).
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Multiply that number by the pallet length (usually 48 in).
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Divide by 12 to convert inches into feet.
When you ship goods on pallets, they’re loaded in rows inside a truck or container.
If the pallets are stacked on top of each other, they take up less floor space and fewer feet. If they’re not stacked, you might need two rows (or more) to fit everything.
So, “divide by 2 to estimate rows” is a rough way to guess how much floor space your shipment will take. It assumes that your pallets can be placed two wide per row inside the trailer.
For example:
You have 8 pallets, each 48″ long.
A standard truck can fit 2 pallets side by side per row, so:
8 pallets ÷ 2 = 4 rows
Each row = 48″ → 4 × 48″ = 192″
192″ ÷ 12 = 16 linear feet
So you’re using about 16 linear feet of trailer space.
Pro Tips for Freight:
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Before calculating, confirm your pallets are stackable; non-stackable freight increases total feet.
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If your freight takes up more than 12 linear feet, you may be charged for a “linear foot rule” rate, or even be priced like a full truckload instead of LTL freight.
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Always verify your carrier’s “linear foot rule” or minimum charges.
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Use an online calculator or consult a freight forwarder like Foresmart for accurate estimates.
Linear Feet vs. Square Feet
While they sound much alike, a linear foot and a square foot are fundamentally different ways to measure.
Linear feet is a measurement of length, one-dimensional. It answers: How long is it?
Square feet is an area measurement, two-dimensional (length × width). It answers: How much surface does it cover?
Assume that you have an 8 ft high, 12 ft (96 sq ft) long wall. If you are placing carpet throughout the surface of the wall, you’d imagine it in square feet (96 sq ft). But if all you are layering in is baseboards along the bottom, you’ll measure out the 12 ft length (or all four sides in a room) as linear feet.
Common Uses of Linear Feet in Real Life
It’s one thing to know what a thing is, and quite another to know where it fits in. To get you started, here are typical real-world, practical applications of the linear foot measurement.
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Trim or molding, installation of baseboard.
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Fencing and deck railing. For instance, quoting a fence might be “$25 per linear foot installed”.
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Countertops or shelving. If you’re installing a countertop that is continuous for 12 feet, you may be charged by linear foot for the pre-cut piece.
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Fabric, carpeting in certain conditions, cable, or piping.
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Trim out, lining, or trim boards around rooms.
Why Is Calculating Linear Feet Useful?
Only measures one dimension (length), which makes arranging materials easier where the width and thickness are the same.
In freight, overlength charges or re-class fees may be incurred if your freight extends standard size limits. Measuring accurately prevents unexpected charges.
Keeps from over-ordering. If you know you need exactly 30 linear feet of trim, you don’t order by area or volume, thus misleading your buyers as well.
Supports accurate pricing. Many vendors price on “per linear foot”.
Makes comparisons easy. If two quotes quote “$ per linear foot”, you can find comparisons by making sure that they are measuring the same length and include the same scope.
Conclusion
A linear foot simply measures length in a straight line, aiding you in accurately figuring out materials, space, or freight. Whether you’re estimating baseboards, countertops, or freight trailer space, you can rest assured there’s less chance of overpaying if you know how to measure linear feet.
Frequently Asked Questions (FAQs)
What is linear feet in relation to measurements?
The standard linear foot is 12 inches in length, measured in a straight line; only length, no width, and no height.
How much is a linear foot?
In LTL(less-than-truckload) freight, the price is about $100 to $200 per linear foot on average in the U.S., depending on weight, distance, and class.
What’s the difference between linear feet and square feet?
The former takes into account length; the latter considers area (length × width).
How to calculate linear square feet?
Basically, this is how you get square feet: Start with length (in feet) and multiply by the width (also in feet).
The standard linear foot is 12 inches in length, measured in a straight line; only length, no width, and no height.
In LTL(less-than-truckload) freight, the price is about $100 to $200 per linear foot on average in the U.S., depending on weight, distance, and class.
The former takes into account length; the latter considers area (length × width).
Basically, this is how you get square feet: Start with length (in feet) and multiply by the width (also in feet).
