Deck Calculator & Planner

Commonwealth Systems

In-app purchases

About this app

Planning a deck, a fence or a set of stairs? Type the size. Deck Calculator & Planner draws it to scale and lists everything you need to buy.

DECK
Type the width, depth and height. See the framing drawn to scale: joists, beam, posts, footings and decking. Attached or free-standing. Get the full material list, grouped by framing, footings and concrete, decking and hardware, and a cut list packed into lumber-yard lengths.

FENCE
Say how long each side is. Add gates and slope. Get posts, concrete, gravel, rails, pickets or panels, gate hardware and a cut list. Wood privacy, wood picket, split rail and vinyl.

STAIRS
Type the height and get the number of steps, the stringer layout with every cut mark, and the lumber. Add a stair to a deck plan or plan stairs on their own.

WHAT YOU GET
- A scaled plan that redraws as you change the size
- A joist and beam check against published span tables, with a flag when a choice is outside the table
- A material list with your own prices and a running total
- Railing counted out: posts and balusters, spaced to keep gaps under 4 inches
- A PDF you can share or print, with a cut list page for the lumber yard
- English and Spanish

FREE TO PLAN, ONE PRICE TO UNLOCK
Planning is free. One purchase unlocks the PDF, the cut list, prices and cost totals, and unlimited saved projects. It is a one-time price. No subscription. No account. Your projects stay on your phone.

Deck Planner helps you plan and estimate. It is not engineering advice and it does not replace your building department, a licensed engineer or a contractor. Span and footing checks come from published prescriptive tables for typical conditions. Your town may use a different code edition, snow load, frost depth or soil value. Most decks need a permit. Check with your local permit office before you buy materials or build.

What’s new

First release on Google Play. Plan your deck, stairs and fence with a full cut and materials list.