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Square Footage Calculator

Add rooms, total the area, and see flooring and paint to order.

Add each room. Totals update live.

Total square footage
Flooring to buy (with waste)
Paint gallons (area ÷ coverage)
Rooms
Verdict

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FAQ

How do I calculate square footage?

Multiply length by width for each rectangle, then add the rooms. L-shapes are two rectangles. This page totals every room you add.

How much extra flooring for waste?

Most flooring jobs add 5–10% for cuts and waste. Tile and diagonal layouts often need 10–15%. The waste field applies that percent to the total.