Calculation details
Planning estimate only. Verify dimensions, waste, coverage, product specifications, and local requirements before purchasing materials.
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Use this result
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What does this calculator estimate?
A square feet to linear feet calculator converts area into the length of material you need. Enter the area and the material's width.
- Linear ft = area ÷ width
- 100 sq ft ÷ 2 ft = 50 linear ft
- Essential for flooring, lumber, fabric
Why the conversion matters
Lumber, flooring, fabric, and trim are sold by the linear foot — but projects are planned in square feet. The conversion divides the area by the material's width to find how much length to buy.
Limitations to watch for
The width must be in the same unit system as the area. Add 10% waste for cuts, seams, and mistakes. Materials with odd widths (carpet rolls at 12 ft, lumber at various) change the answer — use the actual width.
How to use it in practice
Measure the project area, note the material's width (carpet roll, board, fabric bolt), and divide. Add waste before ordering. Re-run when the width changes — a 12-ft carpet roll halves the linear feet vs a 6-ft roll.
['Enter the area.', 'Enter the material width (with its unit).', 'Read the linear feet needed.']
How this calculator works
Formula
Linear feet = area ÷ material width (converted to feet). It converts a square-foot purchase into the linear length of a roll, board, or strip.
Worked example
100 sq ft of 2-foot-wide material = 50 linear feet.
Assumptions to verify
- The material is a uniform strip of the entered width.
- Area and width use convertible units.
- Waste is added by the user (~10%).
Frequently asked questions
How do I convert square feet to linear feet?
Divide the area by the material width: 100 sq ft ÷ 2 ft = 50 linear ft.
What is a linear foot?
A 1-foot length of material regardless of width — how lumber, fabric, and flooring are sold.
Does the width matter?
Yes — the conversion depends entirely on the material's width.
What about carpet rolls?
Carpet comes in 12-ft rolls typically: 100 sq ft ÷ 12 = 8.3 linear ft.
Should I add waste?
Yes — 10% covers cuts, seams, and mistakes.
Can I convert back?
Yes — linear ft × width = area.
Is this the same as board feet?
No — board feet measure lumber volume (thickness × width × length); this is area-to-length.
Cite this tool
BoringToolsKit. “Square Feet to Linear Feet Calculator.” boringtoolskit.com/square-feet-to-linear-feet/ (reviewed 2026-08-25). Free to reference in articles, syllabi, and answer posts with a link.
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