Deck Estimator App — Calculate Every Board, Joist, and Beam

June 6, 2026 • 5 min read • By Steve
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Building a deck seems simple until you sit down to figure out what you actually need to buy. How many joists? What length? How many boards — and do you go with 12-footers or 16-footers to minimize waste? How many bags of concrete for the piers? What about the railing spindles?

I've been building decks for decades. And even with all that experience, I've stood in a lumber yard staring at my notes wondering if I was short on rim board. That's not a good feeling when the client's expecting you to start tomorrow morning.

What Deck Pro + Stairs Actually Calculates

This isn't a basic square footage calculator. Deck Pro handles 8 different deck shapes — rectangle, L-shape, T-shape, U-shape, and more. Enter your dimensions and it calculates everything:

Why Multi-Length Waste Comparison Matters

Here's something most calculators don't do. Deck Pro compares waste across different lumber lengths. If you're decking a 20-foot run, should you buy 10-footers, 12-footers, or 16-footers? The app runs the math on each option and shows you which one wastes the least material. That's real money saved on every job.

Quoting and Getting Paid

Deck Pro isn't just a calculator — it's a quoting system. Generate professional PDF quotes with e-signature, create 3-draw payment schedules, track your profit margin, and send invoices. All from your phone, all on site.

Built for the Field

The app works offline. It works on your phone. It supports metric and imperial. It saves your projects. And it was built by a contractor who's actually framed decks in the rain — not by a tech company guessing at what you might need.

Try Deck Pro + Stairs Free for 7 Days

8 deck shapes, complete materials list, stair calculator, deck skirt estimator, quoting, invoicing, and more.

Launch Deck Pro
Steve is a concrete contractor and the founder of ProBuilder Apps. He builds foundations during the day and software at night. He's based in Canada and probably covered in concrete dust right now.
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