How to Calculate Square Footage (Any Shape, With Examples)
Learn how to calculate square footage for rectangles, triangles, circles and odd shapes, with step-by-step formulas, unit conversions and worked examples.
The Areo blog
Formulas, worked examples and pro tips for measuring rooms, roofs, slabs and yards, and turning square feet into an accurate quote.
Calculate roof square footage from the ground using footprint area and a roof pitch multiplier, then convert to roofing squares and shingle bundles.
Work out how much flooring to buy: measure square footage, add the right waste factor, convert to boxes or square yards, and estimate the total cost.
Turn square footage into cubic yards of concrete, bags, gravel tons and asphalt tons. Includes coverage charts, worked examples and how much extra to order.
What counts toward a home’s square footage, how to measure it from the outside, and why listings, appraisals and tax records often disagree.
Four reliable ways to calculate the square footage of L-shaped, T-shaped, angled and curved rooms, with worked examples and the shoelace formula.
Convert square feet to square yards, square meters, square inches and acres, and back again, with exact factors, quick charts and linear-foot tips.