Square footage guides

Practical, in-depth guides on measuring rooms, flooring, roofing, concrete, and every project in between.

How Is the Square Footage of a House Calculated?

A plain-English guide to how a home's square footage is measured — what counts as finished living area, what gets excluded, and why listings, appraisals, and tax records rarely match.

8 min readRead

What Counts as Square Footage? Garages, Basements, and More

A plain-English guide to what does and doesn't count toward a home's square footage — from garages and basements to attics, porches, and closets — and why the standards exist.

8 min readRead

Usable vs. Rentable Square Feet: Commercial Space Explained

The commercial lease terms usable and rentable square feet decide what you actually pay for — here is how the load factor, loss factor, and BOMA standards turn one office into two very different numbers.

8 min readRead

How to Measure Roof Square Footage from Google Maps

Use Google Maps or Google Earth to trace your roof's footprint from above, then apply a pitch multiplier to estimate true sloped roof area — waste factor and roofing squares included.

7 min readRead

Linear Feet vs. Square Feet: What's the Difference?

Linear feet measure length only, while square feet measure area — and you can only convert between them if you know the width. Here is how each unit works and when to use it.

7 min readRead

How to Measure a Room for Square Footage (Step-by-Step)

A clear, beginner-friendly walkthrough for measuring any room's square footage accurately — including tools, technique, and how to handle closets and odd corners.

7 min readRead

Common Mistakes When Calculating Square Footage (And How to Avoid Them)

The eight most common square-footage errors — from forgetting to convert inches to ignoring roof pitch — with a clear fix for each so your measurements and estimates stay accurate.

8 min readRead

How to Calculate Square Footage Using Only Inches and a Tape Measure

No feet marks, no problem. Learn two reliable ways to turn inch measurements from a plain tape measure into accurate square footage, with worked examples and rounding tips.

7 min readRead

How to Calculate the Square Footage of a Triangle-Shaped Space

Not every space is a rectangle. Learn the simple ½ × base × height formula for triangles, why the height must be perpendicular, and how to split any odd shape into triangles.

7 min readRead

Yard & Landscaping Square Footage: Planning Sod, Mulch & Fencing

Measure an irregular yard, convert square feet to square yards and acres, and turn the numbers into pallets of sod, cubic yards of mulch, and linear feet of fencing.

8 min readRead

Concrete Slab Guide: From Square Footage to Cubic Yards

A step-by-step guide to converting a concrete slab's square footage into cubic yards, choosing the right thickness, and ordering the correct amount of ready-mix or bagged concrete.

8 min readRead

Real Estate Square Footage: How Agents Measure Listing Sizes

Understand how real-estate square footage is measured — what counts as finished living area, why closets and basements are treated differently, and why listing size can differ from an appraisal.

8 min readRead

How to Calculate Square Footage of an Irregularly Shaped Room

L-shapes, T-shapes, diagonal walls, and bay windows made simple. Learn the divide-into-rectangles method with a full worked example that adds up to a reliable total.

8 min readRead

Understanding Siding Square Footage for Accurate Contractor Quotes

Learn how siding square footage is measured, why openings and gables matter, and how contractors turn wall area into siding "squares" — so you can read a quote with confidence.

8 min readRead

Tile Calculator Guide: Avoiding Overbuying or Underbuying Material

How to calculate exactly how much tile to buy — the right waste factor for straight versus diagonal layouts, large-format versus mosaic, dye lots, and the true cost of getting it wrong.

8 min readRead

How to Calculate Roof Square Footage for Accurate Roofing Estimates

Learn how to turn a building's footprint into true roof area using the pitch factor, convert to roofing squares, and add the right waste allowance for a reliable materials estimate.

9 min readRead

Price Per Square Foot: How to Estimate Home Renovation Costs

Learn how to turn square footage into a real renovation budget using price per square foot — including material vs. labor rates, waste factors, and how to compare contractor bids fairly.

8 min readRead

Square Footage vs. Square Meters: Easy Conversion Guide

Understand the difference between square feet and square meters, learn the exact conversion factors, and follow worked examples so you never over-order or under-order materials again.

7 min readRead

How Much Drywall Do You Need? Square Footage to Sheets Guide

Turn a room's dimensions into an accurate drywall order. Learn the wall and ceiling area formulas, how to convert square footage into sheets, and how much waste to add.

8 min readRead

Flooring Material Estimator: How Much Do You Really Need?

Learn how to turn your room's square footage into the exact amount of flooring to buy — including the waste factor, converting square feet to boxes, and a full worked example.

7 min readRead

All square footage calculators

Ten specialized tools for every room, shape, and project.

RoomMeasure any room — rectangular, L-shaped, or multi-section — in seconds.

TriangleFind the area of triangular spaces, gables, and attic sections.

RoofCalculate roof area with pitch adjustment for accurate estimates.

ConcreteConvert slab square footage to cubic yards and bags of concrete.

WallMeasure wall area for paint, wallpaper, or paneling — minus openings.

Flooring / TileEstimate flooring and tile with a built-in waste factor.

SidingCalculate exterior siding area for accurate contractor quotes.

DrywallTurn wall and ceiling square footage into sheets of drywall.

YardPlan sod, mulch, and fencing by measuring your yard area.

CostEstimate total project cost from price per square foot.