HomeImprovCalc offers free calculators for square footage, paint, tile, fence, gravel, roofing, carpet and more, built so DIYers and contractors can estimate materials without doing the arithmetic by hand.
The site is independently operated. Everything runs in your browser and nothing you enter is stored or transmitted anywhere.
Results are estimates. Confirm quantities with your supplier and order a little extra for waste, because the project will find a way to need it.