Linear Feet to Square Feet Calculator
Materials like flooring, fencing, and lumber are often priced by the linear foot but need to be converted to square footage for coverage estimates. Enter your linear footage and width to convert.
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How to Convert Linear Feet to Square Feet
Materials like flooring, fencing, and lumber are often priced or measured by the linear foot, but you frequently need square footage for coverage estimates. The conversion requires knowing the material's width.
How to Calculate Square Feet from Linear Feet
Square Feet = Linear Feet × Width, with both measurements in feet (convert inches to feet first if needed).
Linear Feet to Square Feet Formula
- Square Feet = Linear Feet × Width (ft)
When Do I Need This Conversion?
Whenever you have a length measurement (linear feet of fencing, flooring boards, or trim) and need to know the total coverage area — for ordering flooring, calculating paint or stain coverage, or converting a fence's length into total face area.
Linear Feet to Square Feet Examples
Flooring boards: 150 linear feet of 6" wide board. Convert 6" to 0.5 ft. 150 × 0.5 = 75 sq ft.
Fence coverage: 100 linear feet of fence, 6 ft tall (using height as the "width" value for total face area). 100 × 6 = 600 sq ft of fence surface.
Common Linear-to-Square-Feet Uses
Flooring and decking (converting board linear footage to coverage area), fencing (converting fence length to total surface area for staining or painting), and lumber and trim (converting linear footage to coverage for material estimates).
Common Linear Feet Conversion Mistakes
Forgetting to convert width from inches to feet before multiplying — mixing units is the most common error. Using this conversion for irregular or tapered shapes, where a single constant width doesn't apply — measure and calculate sections separately instead. Confusing linear feet (a length) with square feet (an area) when reading supplier quotes — always check which unit a price is quoted in.
How to Use This Calculator
Enter the total linear feet and the width of the material or area in feet.
Formula & Methodology
Square feet = linear feet × width. This is a straightforward area conversion.
Example: 100 linear feet, 3ft wide
100 × 3 = 300 square feet.
Assumes a constant, uniform width across the entire linear run. For irregular shapes, measure and calculate sections separately.
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Frequently Asked Questions
- How do you convert linear feet to square feet?
- Multiply the linear feet by the width in feet: square feet = linear feet × width.
- Why are flooring and lumber priced in linear feet?
- Materials sold in fixed-width rolls or boards are often priced by length since the width is constant for that product.
- Does this work for fencing?
- Yes — for fencing, use the fence height as the 'width' value to get total fence face area.
Last updated 7/12/2026