To know how much flooring
to buy, all you really need to know is the square footage of the space to be
covered. And that's easy to calculate— it's just length times width, right?
Well, maybe not, if your room isn't a simple square or rectangle.
Calculating Flooring Needs
For complicated shapes, draw a plan like the one at right. Divide the room
into sections based on simple shapes like squares, triangles, and circles.
Then measure each separately, write your results in the box, and add them
up. Add 10 percent for installation errors and to
have a few planks left over for future repairs.
Write a list of any new trim pieces you want and mark on your plan where
Calculating Square Footage
Take all measurements in
inches; calculate the area as follows:
- Rectangles (A): Multiply length by width.
- Right triangles (B and C): Multiply length by width and divide the
answer by 2.
- Circles (D): For full circles, multiply 3.14 by the radius squared
(r2). Divide this by 2 for half circles, by 4 for quarter circles, etc.
- Total everything and divide by 144 to convert to square feet. Add 10% for waste. Round up to the
next whole number.
Measuring for Molding/Trim