Square Footage Calculator
Measure square footage of rooms and irregular spaces.
Square footage
180 sq ft
Square yards
20
Square meters
16.72
With 10% waste
198 sq ft
Measuring rooms that aren't rectangles
Split L-shaped or irregular rooms into rectangles, measure each, and sum — closets and alcoves included if they get the same flooring. Measure at the floor, not the baseboard, and take each wall twice; houses are rarely square.
Ordering materials
Flooring, tile, and carpet orders add a waste factor for cuts and breakage: 10% for straight lays, 15%+ for diagonal patterns or many corners. Carpet pricing per square yard means dividing square feet by 9 — a frequent checkout surprise.
Frequently asked questions
- How does the Square Footage Calculator work?
- Measure square footage of rooms and irregular spaces.
- Is the Square Footage Calculator free to use?
- Yes. The Square Footage Calculator is completely free, runs entirely in your browser, and requires no account or sign-up. Your inputs never leave your device.
Related calculators
Age Calculator
Calculate exact age in years, months, and days between two dates.
Date Calculator
Add or subtract days from a date, or count days between dates.
Hours Calculator
Count hours between two times — great for timesheets.
GPA Calculator
Calculate your GPA from course grades and credit hours.