Free project calculators

Measure once. Let the math be right the first time.

Fast, no-login calculators for lumber, decks, concrete, and drywall. Built by someone who actually buys the materials.

Lumber & Woodworking

Board feet and lumber cost from thickness, width, and length.

Resin volume for river tables, molds, and coatings.

Seasonal expansion and contraction by species and width.

Rise, run, and stringer layout that meets code.

Even spindle spacing that passes the 4-inch sphere rule.

Gallons of stain or sealer for your deck size.

Deck boards and fasteners from joist spacing and deck size.

Posts, rails, pickets, and concrete for your fence run.

Bags of concrete per post hole or sonotube.

Sheets, mud, tape, and screws for any room.