How much paint do I need for a room?

Use our free paint calculator: enter your wall length, height, number of coats, and surface type. The calculator instantly tells you how many litres or gallons of paint you need, including a buffer for wastage.

Is Paint Pro Calc free?

Yes. The basic paint calculator, tile calculator, flooring calculator, concrete calculator, and unit converter are all free with no account required. Pro features like project saving, invoice generation, and profit tracking require a Pro subscription from $2.99/month.

Can contractors use Paint Pro Calc for job quotes?

Absolutely. Paint Pro Calc is built for professional painters and contractors. The Pro plan includes a full quote generator and invoice generator so you can create branded PDF documents and send them to clients in seconds.

Does Paint Pro Calc work offline?

Yes. Paint Pro Calc can be installed as a Progressive Web App (PWA) on any device, giving you quick home-screen access and offline calculation capability on job sites.

What is Paint Coverage Calculator?

A simple and fast calculator to estimate paint needed and cost for your projects.

A detailed comparison of paint estimator tools for professional contractors in 2026, including quotes, invoices, and profit tracking features.

Paint Estimator Tools for Contractors 2026 – Why Paint Pro Calc Beats Free Brand Calculators

Paint Pro Calc invoice and profit dashboard

If you're a professional painter or painting contractor, your estimating tool is your most important business asset. Get it right and you win profitable jobs consistently. Get it wrong and you're either losing money on every job or losing bids to competitors.

In 2026, there's no shortage of free paint calculators online — but almost none of them are designed for contractors running a real business. This guide compares the options and explains exactly why Paint Pro Calc is the tool that serious professionals are switching to.

What Professional Contractors Actually Need

A homeowner needs to know how many litres to buy. A contractor needs much more:

Accurate paint quantities — to avoid waste and underbidding
Material cost breakdown — so you know your floor price
Labour cost estimation — by m² or by day rate
Profit margin calculation — so every job has a target margin
Professional quote document — to send to clients
Invoice generation — for payment once the job is done
Project history — to look back at previous jobs
Client records — contact details, job addresses, notes

Free brand calculators give you one of these things. Paint Pro Calc gives you all of them.

The Problem with Brand Paint Calculators

Dulux, Sherwin-Williams, Resene, PPG, and other paint brands all offer free calculators on their websites. And they're useful — for one thing: estimating how many cans of their paint you need.

Here's what they won't tell you:

Your labour cost
Your material cost if you use a different brand
Your suggested quote price
Your profit margin
How to turn your calculation into a client quote
Anything about invoicing or payment

These calculators exist to sell paint. They're not designed to help you run a business.

Full Feature Comparison: 2026

Contractor checking estimate on mobile

Comparison Chart

Feature	Dulux Calculator	Sherwin-Williams	Basic Tools	Paint Pro Calc
Paint quantity	✅	✅	✅	✅
Multiple surface types	✅	✅	❌	✅
Material cost estimate	❌	❌	❌	✅
Labour cost calculator	❌	❌	❌	✅
Profit margin display	❌	❌	❌	✅
PDF quote generator	❌	❌	❌	✅
Invoice generator	❌	❌	❌	✅
Save projects	❌	❌	❌	✅
Client management	❌	❌	❌	✅
Works on mobile	Partially	Partially	Partially	✅
Brand-neutral	❌	❌	✅	✅
Free tier	✅	✅	✅	✅
Pro tier (full features)	❌	❌	❌	$2.99/mo

Real-World Contractor Workflow: Before vs After Paint Pro Calc

Before (using separate tools)

Visit job site, take measurements
Go home, open Excel spreadsheet
Calculate paint quantity manually
Look up current paint prices online
Estimate labour time from experience
Open Word to write a quote
Email the quote as a Word doc
Follow up manually when job is done
Write an invoice in Word
Try to remember how profitable the job was

Time spent: 2–4 hours per quote

After (using Paint Pro Calc)

Visit job site, enter measurements into Paint Pro Calc on your phone
Get instant paint quantity, cost, and suggested quote price
Generate a branded PDF quote and email it to the client in 2 minutes
When the job is done, convert the quote to an invoice in one click
Check your profit margin in the dashboard

Time spent: 15–20 minutes per quote

How Paint Pro Calc Protects Your Profit Margin

One of the most common problems for painting contractors is profit erosion — you quote a job, win it, and then discover your actual costs were higher than expected.

Paint Pro Calc Pro solves this with the Expenses & Profit Tracker:

Log actual paint costs as you buy them
Record any subcontractor costs
Compare actual spend to your quoted price
See your real profit margin on every job

Over time, this data helps you quote more accurately and stop underpricing your work.

Paint Pro Calc for Different Contractor Types

Solo painters: The free paint calculator handles your day-to-day estimates. Upgrade to Pro when you're ready to send professional quotes.

Small painting businesses (2–5 staff): Pro gives you project management, client records, and profit tracking across multiple jobs.

Larger contractors: The project dashboard lets you manage multiple active jobs, track profitability, and maintain a full client database.

Pricing: What Paint Pro Calc Costs vs What It Saves

Paint Pro Calc Pro: $2.99/month or $24.99/year

Compare that to:

QuickBooks (invoicing only): $30–$90/month
Jobber (field service software): $49–$249/month
ServiceM8: $29–$99/month

For painting contractors, Paint Pro Calc is the only tool that combines paint calculation and business management in a single, affordable platform.

If upgrading to Pro saves you just one hour of quoting time per month, it pays for itself 10×.

Getting Started: Step-by-Step

Go to paintprocalc.com — no download required
Enter your room dimensions — the calculator handles all the math
Review the cost and profit breakdown
Create a free account to save your project
Upgrade to Pro for PDF quotes, invoices, and profit tracking

→ Start Free — No Signup Required

→ View Pro Features & Pricing

The Bottom Line

Free brand paint calculators are fine for homeowners buying a tin of paint. For contractors who need to win jobs, protect margins, and build a professional business, they simply aren't enough.

Paint Pro Calc is purpose-built for painting professionals. It's the only tool in 2026 that takes you from site measurement to client invoice — in one platform, for under $3/month.

Try it free today. No credit card needed.