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Square Footage Calculator – Calculates the square footage of a room or prop...

The Square Footage Calculator calculates the square footage of a room or property from its dimensions. This Square Footage Calculator estimates the materials or values you need for common home projects. Always add a waste margin to material estimates before placing an order.

The formula behind this calculator: Area = length x width, summed across multiple rooms if needed. As a practical example: A room 15ft x 20ft has 300 square feet. All results are calculated instantly in your browser — no data is stored or transmitted.

Square Footage Calculator FAQ

What does the Square Footage Calculator calculate?

Calculates the square footage of a room or property from its dimensions.

Should I add a waste percentage to material estimates?

Yes — always add 5–15% depending on the material and installation pattern. Flooring and tile in particular require extra for cuts and breakage.

How do I measure an irregular room?

Divide the space into rectangles, measure each, calculate areas separately, and sum them. Subtract fixed features like built-ins or islands.

Is this calculator free?

Yes — all CalcHive calculators are free with no sign-up, no account, and no usage limits.