Calculator Uni

Square Footage Calculator

Measure square footage of rooms and irregular spaces.

Space dimensions
ft
ft

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.

Related calculators