How do painters estimate a job?

Professional painters measure surface area, divide by production rates (sq ft per hour for cutting and rolling), price prep separately, add materials at real coverage rates, then apply overhead and margin. The common failure is guessing prep and forgetting overhead.

How much paint do I need per square foot?

One gallon covers roughly 350 sq ft per coat on smooth, previously painted walls; new drywall and rough surfaces cover less. Two coats is standard for color changes, so a 12x12 room's walls typically need about 2 gallons plus ceiling paint.

What is a fair labor rate for painting?

Rates vary by market, but the method doesn't: use your real production rates and your real hourly cost including overhead — not a national average. A painter who knows they cut and roll 150–200 sq ft per hour can price any room in minutes.

Field guide

How to Estimate a Painting Job Without Guessing

Most bad painting bids fail the same three ways: prep gets guessed, production rates get borrowed from someone else's business, and overhead never makes it into the number. Here's a field method that closes all three gaps — and gets the quote out before you leave the driveway.

Step 1 — Measure surface, not rooms

Walk each space and record wall area (perimeter × height), ceiling area, and counts of doors, windows, and linear feet of trim. Openings subtract from wall area but add cut-in time — a wall with four windows paints slower than a blank wall of the same footage. Keep counts explicit; they become line items later. The free drywall & paint calculator converts room dimensions into gallons if you want a fast check.

Step 2 — Grade the prep honestly

Prep is where painting estimates die. Grade it in tiers and price each tier as its own line:

Light: nail holes, minor scuffs, light sand and spot-prime.
Medium: patching, caulk gaps, glossy surface deglossing, water-stain sealing.
Heavy: peeling and scraping, skim coats, wallpaper removal, drywall repair.

Writing prep as separate lines does two things: the customer sees why the price is the price, and a surprise (wallpaper under paint, rotten sill) becomes a signed change order instead of a free afternoon.

Step 3 — Use your production rates

Speed is a business asset, and it's yours — not the internet's. Track a few jobs and you'll know your real numbers: square feet cut and rolled per hour, minutes per door, per window, per linear foot of base. Divide measured quantities by your rates and you have labor hours nobody can argue with. If you don't know your rates yet, time yourself for one week of jobs; it's the highest-return hour of admin a painter can do.

Step 4 — Materials at real coverage

Plan roughly 350 sq ft per gallon per coat on smooth repaint surfaces, less on new drywall or texture. Two coats for color changes. Add primer where you sealed stains or skimmed. Sundries — tape, plastic, paper, caulk, patch — run a fairly steady percentage of paint cost on repaints; track yours once and reuse it.

Step 5 — Overhead and margin, explicitly

Insurance, the van, fuel, phone, software, and every unbillable hour must come out of jobs — before profit exists. Total your direct cost, apply your overhead percentage, then divide by (1 − target margin). Cost × margin is the classic mistake; it always under-bids. The free profit margin calculator shows the difference on your own numbers.

Step 6 — Send it from the driveway

The quote that arrives an hour after the walkthrough beats the better-priced quote that arrives Thursday. This is the part an app genuinely changes: FieldSquire turns voice notes and photos from the walkthrough into editable line items, applies your saved rates and margin privately, and sends a branded PDF for signature — from your phone, while the customer is still thinking about you. See the painting estimating app workflow.

Try it on a real job: FieldSquire's Solo plan is free for 14 days with no credit card — unlimited manual estimates and AI-assisted drafts you review line by line. Start the free trial or see the painting estimating app guide.