Linear Feet
Calculator
Calculate linear footage, square footage, and board feet with cost estimation for any project.
Cost Estimation
Calculate material costs
No saved calculations yet.
Save results from the calculator to see them here.
Linear Feet Calculator — The Easiest Way to Measure Any Project
Whether you’re ordering flooring for a renovation, buying lumber for a fence, or quoting a freight shipment, one measurement trips people up every time: linear feet. Too little and you’re making emergency trips to the hardware store. Too much and you’ve wasted money on material that sits in your garage forever.
This linear feet calculator above solves that problem in seconds. Enter your measurements, hit calculate, and get an accurate result — no math, no confusion. But if you want to understand exactly what you’re measuring and why it matters, keep reading.
What Is a Linear Foot? (And Why It’s Simpler Than You Think)
A linear foot is exactly one foot measured in a straight line — 12 inches, 30.48 centimeters. That’s it. The word “linear” just emphasizes that you’re measuring length in one direction only, not area, not volume.
You may also see it written as a lineal foot — same thing, different spelling. Both terms are used interchangeably in construction, lumber yards, fabric stores, and shipping industries. When you use a linear feet calculator online or search for a calculator for linear feet, you’ll find both spellings used across different tools and suppliers.
Here’s a simple way to keep the three measurement types straight:
| Measurement | What it covers | Example use |
|---|---|---|
| Linear feet | Length only (1D) | Fencing, trim, rope, lumber |
| Square feet | Length × width (2D) | Floor area, wall area, land |
| Cubic feet | Length × width × height (3D) | Storage volume, moving trucks |
A linear feet to square feet calculator (or square feet to linear feet calculator) works by factoring in material width — more on that below.
How to Calculate Linear Feet — Step by Step
Calculating linear feet manually is straightforward. Here’s the standard method:
Step 1 — Measure the length in inches Use a tape measure or laser tool. Get the total length of each piece you’re working with.
Step 2 — Divide by 12 Since there are 12 inches in a foot, divide your inch measurement by 12.
Linear Feet = Total Inches ÷ 12
Step 3 — Add multiple pieces together If your project has several sections — say, four walls of baseboard trim — measure each piece separately and add the totals.
Example: A room has walls measuring 144 in + 108 in + 144 in + 108 in = 504 inches ÷ 12 = 42 linear feet
This is the core linear feet calculation for any project. Our online calculator for linear feet automates this so you skip the mental math entirely.
For a deeper walkthrough of measurement methods, room layouts, and real-world examples, check out our detailed guide: How to Calculate Linear Feet — it covers manual measuring techniques, common mistakes, and conversion shortcuts all in one place.
How to Convert Square Feet to Linear Feet (and Back)
This is where most people get confused — and where a square feet to linear feet calculator becomes genuinely useful.
Square feet measure area. Linear feet measure length. To convert between them, you need to know the width of your material.
Square feet → linear feet
Linear Feet = Square Footage ÷ Material Width (in feet)
Say you have 200 sq ft of flooring to cover, and your planks are 6 inches (0.5 ft) wide: 200 ÷ 0.5 = 400 linear feet of flooring needed
This is what a linear feet to sq ft calculator or sq ft to linear feet calculator does automatically when you enter material width.
Linear feet → square feet
Square Feet = Linear Feet × Material Width (in feet)
A linear feet to square feet conversion calculator is especially useful when a supplier quotes material in linear footage but your project is measured in area.
Quick conversion reference
| You have | You want | Formula |
|---|---|---|
| Inches | Linear feet | ÷ 12 |
| Linear feet | Square feet | × width in feet |
| Square feet | Linear feet | ÷ width in feet |
| Linear feet | Square yards | ÷ 3 |
| Linear feet | Linear yards | ÷ 3 |
| Square feet | Linear yards | ÷ (width × 3) |
A square feet to linear yards calculator or convert linear feet to square yards calculator follows the same logic — just includes a yards conversion (÷ 3) at the end.
Where Linear Feet Actually Gets Used
Calculating linear feet isn’t just a construction thing. Here are the most common real-world applications — and what makes each one slightly different.
Flooring (hardwood, laminate, vinyl plank)
Flooring is sold by the square foot, but the planks themselves are measured in linear feet. A linear feet calculator helps you figure out how many planks you need based on room width. Always add 10% for cuts and waste.
Lumber and board feet
When buying boards at a lumber yard, pricing may be by linear foot or by board feet (which factors in thickness and width). A lumber linear feet calculator or linear board feet calculator helps translate between these. For standard dimensional lumber (like 2×4s or 1×6s), calculate linear feet for lumber by simply measuring total length needed.
Use a board feet to linear feet calculator when your supplier prices in board feet but you’re thinking in lengths. The conversion is: Linear Feet = Board Feet × 12 ÷ (Width × Thickness) where width and thickness are in inches.
Fencing
To calculate linear feet for a fence, measure the total perimeter you want to enclose. If you’re fencing a 50 ft × 80 ft yard, that’s (50+50+80+80) = 260 linear feet of fence line. Add extra for gates and post spacing.
Baseboards and trim
Measure every wall in the room, add them up, subtract door widths, and that gives you your linear feet of trim needed. Always round up and buy 15% extra for miter cuts and mistakes.
Carpet and fabric
Carpet rolls and fabric bolts are sold by linear foot at a standard width (usually 12 ft for carpet, 60 in for fabric). A square footage to linear feet calculator lets you enter your room’s square footage and the material width to find out exactly how many linear feet to order.
Freight and LTL shipping
This one surprises people. In Less-Than-Truckload (LTL) freight, carriers charge based on how much floor space your shipment takes in the trailer — measured in freight linear feet. A linear feet calculator freight tool or LTL linear feet calculator lets you enter your pallet dimensions and get the trailer space needed.
The formula: divide your pallets’ total floor footprint by the trailer width (typically 8.5 ft for a standard 53′ dry van). Carriers round up to the nearest 4 feet for pricing, so a freight linear feet calculator that does this automatically saves you from underbidding or overpaying.
Water line installation
If you’re budgeting a plumbing project, the cost to run water line 1000 feet calculator logic applies here too — you’re essentially calculating linear feet of pipe at a per-foot cost rate.
Pond liners
A pond liner calculator in feet typically asks for length, width, and depth to calculate the liner size needed — which ultimately converts to linear feet of liner material from the roll.
How to Use This Linear Feet Calculator
Using our calculator for linear feet is designed to be fast and foolproof:
- Enter your measurement — type in the length in inches, feet, or centimeters
- Add multiple pieces — if your project has several sections, add each measurement separately
- Select your unit — choose inches, feet, or meters as your input
- Hit Calculate — your total linear footage appears instantly
For square feet to linear feet conversions, enter your square footage and material width — the tool handles the division automatically.
No app download needed. This linear feet calculator app works directly in your browser on any device.
Pro Tips for Accurate Linear Foot Measurements
Even with a feet to linear feet calculator doing the math, your results are only as good as your measurements. Here’s how professionals stay accurate:
Always round up, never down. Material suppliers don’t accept returns on cut lumber or opened flooring. If your calculation gives 47.3 linear feet, order 52.
Measure twice, enter once. A single wrong digit in a linear feet calculation can mean ordering a full box less than you need.
Account for pattern repeats. With patterned flooring or wallpaper, you need more linear footage than bare square footage suggests — sometimes 15–20% more.
Use a laser measure for long runs. For fencing lines or long hallways, a laser measuring tool gives more accurate readings than a tape measure pulled over uneven ground.
Separate your measurements by material type. If you’re ordering 1×4 trim and 1×6 baseboard for the same project, keep the linear feet calculations separate — they’re different products at different prices.
Frequently Asked Questions
Is a linear foot the same as a regular foot? Yes. “Linear foot” and “foot” refer to the same 12-inch measurement. The word “linear” is added to clarify you’re measuring length, not area or volume — especially useful when comparing against square feet or cubic feet in the same conversation.
Is lineal foot the same as linear foot? Completely the same. “Lineal feet” and “linear feet” are interchangeable spellings. You’ll see both used at lumber yards, fabric stores, and shipping companies. A linear feet calculation and a lineal feet calculation produce identical results.
How do I convert square feet to linear feet? Divide square footage by the material width in feet. If your material is 6 inches (0.5 ft) wide and you need 150 sq ft covered, that’s 150 ÷ 0.5 = 300 linear feet. Use our square feet to linear feet conversion calculator above to automate this instantly.
How do I calculate linear feet from square footage? Same method: Linear Feet = Square Footage ÷ Width (in feet). This is the core formula behind every calculate linear feet from square feet tool. Without knowing material width, the conversion isn’t possible — width is the essential missing variable.
What is a linear foot in freight shipping? In LTL freight, linear feet refers to the length of trailer floor space your shipment occupies, regardless of how tall it is. Carriers use this to price partial truckload shipments. A standard pallet is about 4 ft × 4 ft — so two pallets side-by-side in a 96-inch-wide trailer = 4 linear feet of floor space. Use a freight linear feet calculator or LTL linear feet calculator to calculate exact space and avoid surprise surcharges.
How do I calculate linear feet for lumber? Measure the total length of boards you need. If you need 10 boards each 8 feet long, that’s 80 linear feet. A linear feet calculator lumber tool helps when you have boards of different lengths. For pricing by board feet, use a board feet to linear foot calculator that accounts for thickness and width.
What’s the difference between linear feet and square yards? Linear feet measure one-dimensional length. Square yards measure two-dimensional area (1 sq yard = 9 sq ft). Converting between them requires material width. A square feet to linear yards calculator divides square footage by (width in feet × 3) to give linear yards.
How do I calculate linear feet for fencing? Measure the total perimeter of the area you want to fence. Add up all sides. That total is your linear feet for fence requirement. Add 10% for gates, corners, and post adjustments.
Conclusion
From calculating linear feet for a small DIY trim job to running a full freight linear feet calculator for an LTL shipment — every project that involves length-based materials benefits from getting this number right the first time.
Our linear feet calculator online at the top of this page handles the full range: simple length conversions, square feet to linear feet calculations with material width, board feet to linear feet conversions, and multi-piece totals for complex projects. No login, no download, no cost.
Run your numbers above, write them down, and order with confidence.
For further reading on measurement standards and unit conversions, the National Institute of Standards and Technology (NIST) publishes official guidance on length units and measurement best practices — a useful reference when working on projects that require precise, standardized measurements.