Deck calculators that show their working
Enter your deck's size and get a boards, joists and screws count, with the sum behind every number. Free, no sign-up.
Calculators
- Deck material calculator
Boards, joists, screws and cost for a rectangular deck.
- Deck joist calculator
Joist count and lengths.
Coming soon - Deck stair calculator
Steps, risers and stringers.
Coming soon - Deck railing calculator
Posts, rails and balusters.
Coming soon - Deck cost calculator
A full materials budget.
Coming soon - Deck stain calculator
How much stain or sealer to buy.
Coming soon
About DeckTally
DeckTally makes free calculators for people planning a deck. Each one uses simple, published formulas and shows the sum behind every number, so you can check it yourself before you buy. More tools are on the way; start with the deck material calculator to count boards, joists and screws.