Deck Cost Calculator for Deck Builders

The form your customers fill out

A live calculator, not a static quote request. Your customer enters their details and watches the number update on the spot, which is what turns a browser into a booked job.

What it calculates

Price by square footage and decking material from pressure-treated to composite
Height tier (ground, raised, second-story) drives framing and footing cost
Railing linear footage, stairs, and add-ons like benches priced from your tables
Demo and old-deck removal added as a conditional line item
Homeowner lead with the estimate attached drops into your dashboard

Why it closes more deals

⚡

A live number closes deals

Customers who see a real estimate the second they enter their details are far likelier to book than ones told to call for a quote. The number is the hook.

📊

Runs your most complex spreadsheet

Multi-tab workbooks, lookup tables, tiered rates, conditional line items, the lot. If the math runs in Excel, CalcForms runs it behind a clean form.

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Update it by chatting

Prices move. Ask Claude to change a rate, add an option, or insert a step and the live form updates in seconds. No developer, no redeploy.

🎯

Backtest before you publish

Run your last 20 real jobs through it and tune the formula until the live estimate matches what you actually charge. Ship it once it lines up.

How this form was built

No template builder and no code. One message to Claude with the CalcForms connector switched on:

✦ Claude with the CalcForms connector

Build a deck cost calculator. Inputs: square footage, decking material (pressure-treated $35/sqft, cedar $48/sqft, composite $62/sqft, PVC $75/sqft), height (ground 1.0x, raised 1.15x, second-story 1.35x), railing type by linear foot, and a yes/no for tearing out an old deck (add $8/sqft). Multiply sqft by material, apply the height multiplier, add railing and demo, then show the homeowner a low-to-high range. Keep my costs internal.

Done. I built Deck Cost Calculator with your pricing and deployed it to forms.badabingapp.cc. The math runs server-side and every submission is saved with the inputs and email. Want to add a field or change a rate? Just tell me.

Build this exact form

CalcForms is a connector you add to Claude once. After that you build and edit forms just by chatting.

Add CalcForms to Claude. Open the Add custom connector dialog, name it Calcforms, and paste https://forms.badabingapp.cc. One time, about 60 seconds.
Paste the prompt below. Claude builds the form, wires in your math, and hands you a live URL.
Share it, then tweak by chatting. Put it on your site or send the link. Change a rate or add a field later just by asking.

Copy this prompt into Claude

"Build a deck cost calculator. Inputs: square footage, decking material (pressure-treated $35/sqft, cedar $48/sqft, composite $62/sqft, PVC $75/sqft), height (ground 1.0x, raised 1.15x, second-story 1.35x), railing type by linear foot, and a yes/no for tearing out an old deck (add $8/sqft). Multiply sqft by material, apply the height multiplier, add railing and demo, then show the homeowner a low-to-high range. Keep my costs internal."

Example run: A 400 sq ft raised composite deck ($62/sqft, 1.15x) with composite railing comes out to about $30,000 to $36,000.

New to connectors? A connector (an MCP server) is a secure link between Claude and an app. The CalcForms connector lets Claude build, deploy, and update real calculator forms for you, all from the chat window.

Formulas it supports

sqft times material rate
height tier multiplier
railing linear-foot cost
demo conditional add
INDEX/MATCH material table

FAQ

Can it price composite versus pressure-treated correctly?

Yes. Each material maps to its own per-square-foot rate in a lookup table. Tell Claude your rates and the form picks the right one when the homeowner chooses.

Can I add stairs, benches, and lighting?

Yes. Add them as inputs and Claude wires each one as a conditional add-on that only adds cost when the homeowner selects it.

Does the homeowner see my markup?

No. The customer sees the estimate range only. Your material costs and margin stay internal, and you pick per field what is public.

Can I check it against decks I have already built?

Yes. Backtest it against your past jobs by entering their specs and confirming the estimate matches what you charged before you go live.

Build yours in the next 10 minutes.

Your first form is free. No credit card.

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