Concrete Cost Calculator for Contractors

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

Prices driveways, patios, and slabs by area
Adjusts for 4, 5, or 6 inch thickness
Adds broom, stamped, or exposed finish
Includes excavation, base, and rebar
Factors demolition and removal of old concrete

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.

🔁

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 concrete cost calculator. Inputs: project type, area in square feet, slab thickness, finish, and whether to remove existing concrete. Base price broom finish at $8/sqft for 4 inch, add $1.25/sqft per extra inch of thickness, add $4/sqft for exposed aggregate or $7/sqft for stamped, and add $3.50/sqft for demo and haul-away. Show the customer an estimated concrete price.

Done. I built Concrete 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 concrete cost calculator. Inputs: project type, area in square feet, slab thickness, finish, and whether to remove existing concrete. Base price broom finish at $8/sqft for 4 inch, add $1.25/sqft per extra inch of thickness, add $4/sqft for exposed aggregate or $7/sqft for stamped, and add $3.50/sqft for demo and haul-away. Show the customer an estimated concrete price."

Example run: 600 sqft stamped patio, 4 inch, no demo: about $9,000 estimated concrete price.

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

area x base rate
thickness add per inch
finish upgrade add
demo and haul-away
rebar and base

FAQ

Does it price finishes like stamped and exposed aggregate?

Yes. The finish field adds your upgrade cost per square foot for broom, exposed aggregate, or stamped concrete automatically.

Can it factor slab thickness?

It adds cost per extra inch over a 4-inch base, so thicker driveways and footings price higher without a separate form.

Does it include tear-out of old concrete?

A removal field adds demolition and haul-away per square foot when the customer is replacing an existing slab.

Will the estimate match my real bids?

Backtest against your past pours and tune the per-square-foot rates and finish add-ons until the live number matches what you actually quote.

Build yours in the next 10 minutes.

Your first form is free. No credit card.

Start free →