Deck Planner & Calculator

Deck Layout Calculator — Plan, Estimate & Build with Confidence

The professional-grade deck planning tool that does the maths so you can focus on the build. Whether you're a seasoned carpenter, a building apprentice, or a weekend DIYer tackling your first deck project — this app delivers instant, accurate layout calculations right on your iPhone.

INSTANT RESULTS, ZERO GUESSWORK
Enter your deck dimensions and component sizes — every result updates in real time. No "calculate" button, no waiting. Change one input and watch the entire layout recalculate instantly.

COMPLETE STRUCTURAL BREAKDOWN
- Stumps — count, spacing, centres, set-out points, height adjustments for sloping ground
- Bearers — count, spacing, connections, single or double configuration, housed option
- Joists — count, spacing, rim joist options, mid-joist centre for breaker boards
- Boards — count, gap calculation, board fit options, first/last board cut widths

VISUAL DECK DIAGRAMS
Switch between a top-down Plan view and a side Profile cross-section. Toggle individual layers (stumps, bearers, joists, boards) on and off. See dimensions, spacing, and diagonal measurements at a glance.

BOARD STAGGER PATTERNS
Visualise ½, ⅓, or ¼ board stagger layouts. See exactly how many boards to purchase, which pieces to cut, how offcuts are reused, and the waste percentage — row by row.

FOOTING CALCULATIONS
Specify footing diameter, depth, and concrete bag size. Get the total concrete volume and exact number of premix bags needed for every stump.

FULL MATERIAL LIST
Linear metres and cubic volume for every component — stumps, bearers, joists, and boards — with a combined total. Plus a complete connection count: bearer-to-stump, joist-to-bearer, board-to-joist, and total screws.

COST ESTIMATION
Enter cost per linear metre and waste percentage for each component. Get a full cost breakdown, cost per square metre, and "cost to add one more" estimates for quick what-if comparisons.

BUILT FOR THE JOB SITE
- Adjust stump, bearer, and joist counts with +/- buttons — spacing recalculates automatically
- Set-out points ready to transfer to your tape measure, with mark-every-N highlighting
- Flip deck dimensions with one tap to compare orientations
- Share a complete text summary of all results with your team or client
- Inputs auto-save — pick up exactly where you left off

PRECISION YOU CAN TRUST
Ground fall support calculates individual stump heights across sloping sites. Board gap is auto-adjusted to fit full-width boards. Every calculation follows real-world construction logic.

Whether you're quoting a job, ordering materials, or setting out on site — Deck Layout Calculator puts a full deck planning toolkit in your pocket.