▦ Square FootageCalculator
Calculators RoomHouseRoofRoof PitchHip RoofTileGrout & ThinsetFlooringDeckPaintPainting CostConcreteCountertopCabinetsBaseboard & TrimWall / DrywallConcrete BlockLawnPoolRectangleTriangleCircleIrregular ShapePrice Per Sq FtBTU by Sq FtFeet & InchesSquare Meter
Converters Area Converter (All Units)Acreage CalculatorAcres to HectaresSq In to Sq FtSq Ft to Sq YardsLinear Foot CalculatorCubic Yard CalculatorSq Ft to Sq MetersSq Meters to Sq Ft
Guides How to Calculate Square FootageWhat Is a Square FootSquare Footage ChartStandard Room SizesAverage Bedroom SizeCloset DimensionsCountertop DimensionsStandard Ceiling HeightStandard Door SizesStandard Garage SizeGarage ConversionPool Table Room SizeConference Room SizeHow Sq Ft Is MeasuredCommercial Sq FtGross Floor AreaGross vs Net Sq FtDoes a Garage CountAverage House SizeAverage Apartment SizeAC Size by Sq FtWhat Counts as Sq FtANSI Z765 StandardGross Living AreaDoes a Basement CountBasement TypesDoes a Sunroom CountWhat Is a Florida RoomDoes an Attic CountDo Porches & Decks CountDo Closets CountDo Stairs CountAbove vs Below Grade

Disclaimer

Last updated: October 13, 2026

Everything on calcsquarefootage.com is general information for planning. Calculator results are estimates, not official measurements, and they are only as accurate as the numbers you enter.

Check before you buy or sign

  • Materials: confirm quantities with your supplier or installer. Waste, pattern matching, cuts and product sizes change how much you need.
  • Building work: follow your local building code and get permits where required. Our guides describe common standards, and local rules may differ.
  • Buying, selling or renting: listed and appraised square footage follows specific rules, such as the ANSI Z765 standard used by many appraisers, and lenders and agents may measure differently. For a figure you will rely on, hire a licensed appraiser or measurement professional.
  • Heating and cooling: our BTU calculator gives a rough estimate. An HVAC professional should size equipment with a proper load calculation.

No professional relationship

Using the site does not create a professional relationship of any kind. We are not your appraiser, contractor, architect, engineer or real estate agent.

Prices and costs

Cost figures on the site are examples or ranges and can be out of date. Get current quotes before you budget.

We link to outside sources and, sometimes, to retailers. We do not control those sites and are not responsible for what they say or sell. Some links may earn us a commission; see our affiliate disclosure.

Limitation of liability

You use the site at your own risk. Our terms of use explain the limits on our liability.

Found a mistake? Let us know.