Linear Feet Calculator
Use this free linear feet calculator to quickly convert measurements into linear feet for your project. Enter dimensions like length, width, or total area to get accurate results, making it easy to estimate materials for flooring, fencing, lumber, and construction work.
Linear feet = length only — no width or height · Always add waste factor when ordering materials · 1 linear foot = 12 inches = 0.333 yards = 0.3048 meters
How Does the Linear Feet Calculator Work?
Linear feet (also written as lineal feet) measure length in one direction only — no width or height involved. The term is used in construction, flooring, fencing, lumber, trim, fabric, and piping whenever only the length of a material matters, regardless of its cross-section or profile.
This calculator converts any unit (inches, yards, meters, centimeters) to linear feet, multiplies by the number of segments or pieces, and applies a waste factor so you order the right quantity the first time.
Linear feet measure length only (one dimension). Square feet measure area (length × width). A board that is 8 feet long is 8 linear feet regardless of whether it's 2 inches wide or 12 inches wide. When buying flooring, the store sells by square feet (area). When buying trim, crown molding, or fencing, they sell by linear feet (length). Knowing which unit applies prevents costly ordering mistakes.
Use our square footage calculator when you need area measurements, or our board feet calculator when buying dimensional lumber that accounts for thickness and width.
Unit Conversion Reference
| From | To Linear Feet | Multiply By | Example |
|---|---|---|---|
| Inches | Linear Feet | ÷ 12 | 72 inches ÷ 12 = 6 linear ft |
| Yards | Linear Feet | × 3 | 10 yards × 3 = 30 linear ft |
| Meters | Linear Feet | × 3.2808 | 10 meters × 3.2808 = 32.81 linear ft |
| Centimeters | Linear Feet | ÷ 30.48 | 300 cm ÷ 30.48 = 9.84 linear ft |
| Linear Feet | Inches | × 12 | 6 linear ft × 12 = 72 inches |
| Linear Feet | Yards | ÷ 3 | 30 linear ft ÷ 3 = 10 yards |
| Linear Feet | Meters | × 0.3048 | 10 linear ft × 0.3048 = 3.048 m |
Common Uses by Project Type
| Project | What to Measure | Typical Waste Factor | Notes |
|---|---|---|---|
| Fencing | Perimeter of fence run | 10% | Add for gate gaps and end posts |
| Baseboards / Trim | Perimeter of room walls | 10–15% | Extra for inside/outside corners and cuts |
| Crown Molding | Perimeter of ceiling | 15% | Miter cuts waste more material |
| Flooring (strip/plank) | Length of room | 5–10% | Sold by sq ft but installed in linear runs |
| Piping / Conduit | Run length + fittings | 5% | Account for elbows, tees, and connections |
| Gutters | Length of roof eaves | 10% | Add for downspout sections and corners |
| Lumber (framing) | Each wall run | 10% | Use framing calculator for full stud count |
| Deck boards | Length of deck | 10–15% | Use deck boards calculator for board count |
Material suppliers don't take back cut pieces. Whether you're ordering trim, fencing, or piping, always add at least 10% to your net measurement before placing an order. For projects with diagonal cuts, miter corners, or irregular layouts, use 15%. Running short mid-project means a second trip to the store and the risk of a slightly different dye lot or batch — adding waste upfront is always cheaper than running short.
Example Calculations
Example 1 — Fence Perimeter
40 + 60 + 40 = 140 linear ft net
Add 10% waste factor:140 × 1.10 = 154 linear ft to order
Example 2 — Baseboard Trim for a Room
(12 + 14) × 2 = 52 linear ft net
Subtract one doorway (3 ft):52 − 3 = 49 linear ft net
Add 15% for corner cuts:49 × 1.15 = 56.4 → order 57 linear ft
Example 3 — Converting Inches to Linear Feet
648 ÷ 12 = 54 linear ft net
Add 15% waste for miter cuts:54 × 1.15 = 62.1 → order 63 linear ft
Frequently Asked Questions
How We Calculate
Unit Conversion to Linear Feet
Inches → feet: ÷ 12 · Yards → feet: × 3 · Meters → feet: × 3.28084 · Centimeters → feet: ÷ 30.48
All conversions use the exact US customary unit definitions: 1 yard = 3 feet (exact), 1 foot = 12 inches (exact), 1 inch = 2.54 centimeters (exact by international agreement since 1959), 1 foot = 0.3048 meters (exact). The meter conversion factor of 3.28084 ft/m is a rounded approximation of the exact value 1 m = 3.2808398950... ft.
Multiple Segments
Net Linear Feet = (Measurement in feet) × Number of Segments
The segments multiplier handles repetitive runs — fence panels, wall perimeters calculated as segments, multiple pieces of the same length. Enter the length of one segment and the quantity; the calculator multiplies before applying the waste factor. This is equivalent to adding up N identical measurements manually.
Waste Factor
Gross Linear Feet = Net Linear Feet × (1 + Waste %)
The waste factor is applied to the net total after the segments multiplication. It accounts for end cuts, miter joints, damaged pieces, and measurement imprecision. The industry standards for waste factors used in this calculator are: 5% for flooring and straight-cut materials (per NWFA flooring installation guidelines), 10% for fencing and standard trim, 15% for crown molding and diagonal cuts, 20% for complex or high-waste applications. The “Net (no waste)” stat always shows the raw measurement for comparison.
Output Units
All output units are calculated from the gross linear feet (after waste): Linear Yards = gross ft ÷ 3 · Linear Inches = gross ft × 12 · Meters = gross ft × 0.3048. The “Net (no waste)” stat uses the pre-waste net feet for comparison against your measured quantity.
- US Customary Unit Definitions — Linear Foot, Yard, Inch — 1 yard = 3 feet (exact), 1 foot = 12 inches (exact), and 1 inch = 2.54 centimeters (exact, by international agreement since 1959 under the International Yard and Pound Agreement). These are the exact conversion factors used for all unit calculations in this calculator. Referenced for the unit conversion table and all formula calculations. National Institute of Standards and Technology (NIST), US customary units.
- NWFA (National Wood Flooring Association) — Installation Guidelines — 5–10% waste factor recommendation for hardwood and engineered wood flooring installation, referenced in the waste factor selector and the common uses table for flooring applications. Flooring is sold by the square foot but installed in linear runs, and the NWFA 5–10% waste standard is the industry reference for ordering quantities. NWFA Installation Guidelines, current edition.
- Industry Trade Standards — Trim, Molding, and Fencing Waste Factors — 10–15% waste factor for interior trim and baseboard (extra for inside/outside corners and end cuts), 15% for crown molding (miter cuts waste significantly more material than straight cuts), and 10% for fencing perimeter runs (accounts for gate gaps and end post offsets). These waste factor ranges are standard practice used by finish carpenters, trim installers, and fence contractors throughout the US. Referenced in the waste factor dropdown options, common uses table, and How We Calculate section. Standard industry installation practice.
- HomeAdvisor True Cost Guide 2026 — Fencing and Trim Installation — Fencing installation waste and overlap guidance (10% standard allowance for gate openings and corner posts) and trim/baseboard installation waste standards referenced in the common uses table and worked examples. HomeAdvisor / Angi, 2026.
All unit conversion factors use exact international definitions. Waste factor percentages are industry guidelines — actual waste may vary based on room layout complexity, installer skill, and material quality. Always verify specific waste recommendations with your material supplier or installer. ConstructlyTools does not have a paid relationship with any material supplier or contractor mentioned on this page.