Linear Foot to Square Foot Calculator
Convert between linear feet and square feet for lumber, flooring, baseboards, and building materials. Calculate coverage area and material needs.
Conversion Result
Cost Estimate
Material Summary
Common Material Widths
Lumber (Nominal)
- 1x4 = 3.5" actual
- 1x6 = 5.5" actual
- 1x8 = 7.25" actual
- 2x4 = 3.5" actual
- 2x6 = 5.5" actual
Flooring Planks
- Strip flooring: 2.25"
- Standard plank: 3.25"
- Wide plank: 5-7"
- Engineered: 3-5"
- Luxury vinyl: 6-9"
Decking Boards
- 5/4x4 = 3.5"
- 5/4x6 = 5.5"
- Composite: 5.5"
- PVC decking: 5.5"
Frequently Asked Questions
How do you convert linear feet to square feet?
To convert linear feet to square feet, multiply the linear feet by the width in feet. Formula: Square Feet = Linear Feet × (Width in inches ÷ 12). Example: 100 linear feet of 6-inch wide board = 100 × 0.5 = 50 square feet.
How do you convert square feet to linear feet?
To convert square feet to linear feet, divide the square feet by the width in feet. Formula: Linear Feet = Square Feet ÷ (Width in inches ÷ 12). Example: 100 square feet with 6-inch wide boards = 100 ÷ 0.5 = 200 linear feet.
What is a board foot?
A board foot is a unit of volume for lumber, equal to 144 cubic inches (1 foot × 1 foot × 1 inch). Formula: Board Feet = (Thickness × Width × Length) ÷ 12. Example: 1" × 6" × 8' = 4 board feet.
How many linear feet are in a square foot?
This depends on the width of the material. For 12-inch wide material, 1 square foot = 1 linear foot. For 6-inch wide material, 1 square foot = 2 linear feet. Use our calculator for exact conversions based on your material width.
How much flooring do I need for a 10x10 room?
A 10x10 room has 100 square feet. With 5-inch wide planks and 10% waste, you'll need approximately 220 linear feet of flooring. Use our coverage estimator for accurate calculations.
What is the difference between nominal and actual lumber size?
Nominal size is the rough sawn size before planing. Actual size is the finished dimension. For example, a 2x4 nominally measures 2"×4" but actually measures 1.5"×3.5". Our calculator uses actual dimensions for accurate estimates.