Construction Calculators

Free estimating tools for home projects, grouped in the order most jobs need them. Results are planning estimates, so check product labels and local building codes before you buy or build.

Start by measuring

Most material estimates begin with an accurate area and clean feet-and-inches math. Measure twice, then carry the same numbers through each calculator.

Foundations, slabs and masonry

Order concrete in cubic yards and allow extra for uneven subgrade, since coming up short mid-pour is costly.

Framing and roofing

Work out your layout first, then convert it into a lumber and sheathing list.

Walls and finishes

Hang and finish drywall before you paint or paper, and buy finishing materials from the same square footage.

Flooring

Flooring waste depends on the layout, so include a waste allowance for cuts and any pattern matching.

Outdoors and driveways

Outdoor materials are sold by the ton, yard, pail or bag, so these tools convert your area into something you can order.

Heating, cooling and electrical

Use these to plan and budget. Have a licensed professional confirm sizing and code requirements before installing anything.