Linear Feet Calculator
Your estimate
- Cost
- $240
Total length of boards, trim or baseboard — or how many linear feet of boards cover a floor or wall.
Updated 2026-10-20 · Based on: exact NIST unit definitions.
How to use the Linear Feet Calculator
- Pieces: enter the length of one piece and the count.
- Cover an area: enter the area and the board width.
- Add a price per linear foot for the cost.
Formula
Linear feet = piece length × number of pieces.
To cover an area: linear feet = area ÷ board width (in feet). 5½ in boards cover 0.458 ft per linear foot.
Worked example
With the values preset in the calculator above: (Pieces)
- Piece length
- 8 ft
- Number of pieces
- 12
- Linear feet
- 96 ft (29.3 m)
- Cost
- $240
Baseboard: how many linear feet?
Measure the perimeter of the room and subtract door openings (about 3 ft each). A 12 × 12 ft room with one door needs 48 − 3 = 45 ft; buy 10 % more for corner cuts.
Frequently asked questions
What is the difference between linear feet and square feet?
Linear feet measure length only; square feet measure area (length × width).
How many linear feet of 6 in boards cover 100 ft²?
A nominal 6 in board is 5.5 in wide, so 100 ÷ (5.5 ÷ 12) = 218 linear feet before waste.
Is a lineal foot the same as a linear foot?
Yes — both mean one foot of length.
More calculators
Estimates only — check quantities with your supplier and local building code before you order.