Home and property
Square footage calculator
Measure each rectangular area in feet and add it as a row. Split L-shaped rooms into two rectangles. Add a price per square foot to estimate flooring or other materials.
What this means
- The areas add up to 278.0 square feet, or 25.83 square meters.
- With 10% extra, buy about 305.8 square feet of material.
- At $4.00 per square foot, materials cost about $1,223.20.
What if
About this calculator
What this calculator does
It multiplies length by width for each rectangle and adds them up. It then adds a waste allowance and, if you give a price, estimates the cost.
How it is calculated
area = length * width (for each rectangle)
total = sum of all areas
with waste = total * (1 + waste / 100)
square meters = square feet * 0.09290304
How to read the result
Square feet is the measured floor area. Buy materials from the with-waste figure, rounded up to whole boxes or rolls.
Sources and method
Standard arithmetic with no outside data. The formula is shown under How it is calculated, and unit tests check worked examples, including edge cases.
This page uses arithmetic only, with no outside data.
Questions
How do I measure an L-shaped room?
Split it into two rectangles and enter each one as its own row.
How much waste should I add?
It depends on the material and layout. Ask your installer or check the product instructions.
Can I enter inches?
Convert first. Divide inches by 12 to get feet, for example 6 inches is 0.5 feet.
Is this the same as a home's listed square footage?
Not exactly. Listings follow their own measuring rules. This page measures the areas you enter.