Deck Calculators

Every calculator solves one problem, works on its own, and needs no account.

Materials

Board rows, quantity, and waste for any deck size and layout.

Fasteners and boxes needed based on board rows and joist crossings.

Field joist lines from deck width and on-center spacing.

Posts and panels for straight or connected railing sections.

Even spacing and count for a target maximum gap.

Post counts for edge and railing sections at your planning spacing.

Board-layout math for composite products, with picture-frame and breaker-board options.

Quick per-square-foot estimate or a detailed line-item budget.

Square footage for rectangular or multi-section decks, with cutouts.

Riser height, tread count, and approximate stair angle.

Even gap sizing between boards across a fixed width.

Gallons needed from surface area, coats, and product coverage.

Paint and primer quantities, calculated separately.