Square Footage Guides
Fourteen guides covering how square footage is measured, where the conventions differ, and how to turn a measurement into a materials order.
How to Calculate Square Footage Learn how to calculate square footage for any shape or room. Step-by-step formulas for rectangles, circles, triangles and L-shapes, with worked examples and unit conversions. How to Calculate Price Per Square Foot Learn how to calculate price per square foot for homes, flooring and commercial rent. The formula, what square footage to divide by, and how to compare properties fairly. How to Calculate Square Footage From Inches Convert inches to square feet correctly. Two reliable methods, why you divide by 144 and not 12, and how to handle measurements in feet and inches. How to Calculate Square Footage of a House How house square footage is measured — what counts as living area, what is excluded, the ANSI standard, and how to measure a two-storey home correctly. How to Measure Square Footage on Google Maps Measure a lot, yard or irregular parcel from satellite imagery. Step-by-step instructions for Google Maps and Google Earth, plus how accurate the results really are. Square Footage Formulas by Shape Every area formula you need in one table — rectangle, circle, triangle, trapezoid, hexagon, ellipse, L-shape and irregular areas, with worked examples in feet. How to Measure a Room in Square Feet A practical walkthrough for measuring any room in square feet — including alcoves, bay windows, closets, chimney breasts and stairs. How to Calculate Square Footage of a Wall Calculate wall square footage for paint, drywall or tile. How to measure a single wall or a whole room, and when to subtract doors and windows. Square Feet vs. Linear Feet Square feet measure area, linear feet measure length. Learn the difference, when suppliers use each, and how to convert between them using material width. How to Calculate Roof Square Footage Calculate roof square footage from your building footprint and pitch. Pitch multiplier table, roofing squares explained, and how to measure without climbing up. Square Footage for Flooring, Tile and Carpet How much flooring to order — waste factors by layout, box counts, dye lots, and the differences between hardwood, tile, carpet and vinyl. How to Calculate Square Footage of Land Measure a lot or parcel in square feet and acres. Handling irregular boundaries, reading a plat map, and the land units used outside the US. Commercial Lease Square Footage Explained Rentable vs. usable square footage, load factor, and how annual dollars per square foot rent works. What you are actually paying for in a commercial lease. HVAC Sizing: BTU and Tons Per Square Foot How to size an air conditioner or heater from square footage. The 20 BTU rule, what a ton of cooling means, and why oversizing causes real problems.
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