Flooring Calculator
Find how many square feet of flooring a room or several rooms need, with waste and the cost.
Change the values and press Calculate to work out your own figures.
One room
Enter the room's length and width.
Show the working
- area = Σ length × width × (1 + waste %)
Several rooms
Add a row for each room or part of an L-shaped room.
Show the working
- area = Σ length × width × (1 + waste %)
How to use it
Enter the room's length and width. Add a row for each room or part of an L-shaped room.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
flooring = Σ length × width × (1 + waste %)
Waste
10% for straight installs; 15–20% for diagonal, herringbone or parquet.
Questions
How much flooring for a 15 × 12 ft room?
198 sq ft with 10% waste.
Formulas
flooring = Σ length × width × (1 + waste %)
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.