About HouseCalcs

HouseCalcs is a free set of building material calculators for every part of a house, from the roof down to the baseboards. Tap a part of the house, enter a few measurements, and get the numbers you need to take to the store.

The site was built by a longtime builder who got tired of calculators that ignore how jobs really go. Every calculator includes realistic waste, the way materials are actually sold (bags, boxes, sheets, buckets), and tips from the field.

How the numbers work

Each calculator uses common trade rules of thumb, like coverage per gallon, bricks per square foot, and extra for cuts and breakage. These are good estimates for planning and budgeting. Products vary, so always check the label and confirm quantities with your supplier before you buy.

Found a problem?

If a number looks off or you'd like a calculator we don't have yet, send us a note.