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For painting contractors

Painting Estimating Software for Painting Contractors

A painting bid lives or dies on square footage, prep and coats. Trades HQ turns your measurements into estimate lines, applies your rates, and gets the job approved and invoiced.

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Why painting jobs are hard to price

How Trades HQ helps painting contractors

A painting estimate, step by step

  1. Measure wall area: room perimeter × wall height.
  2. Subtract large openings like doors and windows.
  3. Multiply by the number of coats.
  4. Divide by the paint's coverage per gallon (check the can; many paints list roughly 350–400 sq ft per gallon).
  5. Add prep time, trim and ceilings as their own lines.
  6. Apply your overhead and profit.

Example (illustrative): a 12 × 14 ft room with 8 ft walls.

StepMathResult
Perimeter12 + 14 + 12 + 1452 ft
Wall area52 × 8416 sq ft
Minus 1 door and 1 window416 − 20 − 15381 sq ft
Two coats381 × 2762 sq ft
Paint needed at 375 sq ft/gal762 ÷ 375about 2 gallons

Pricing tip: Price prep as its own line so it doesn't disappear into your painting rate. And remember that markup and margin aren't the same number: a 20% margin needs a 25% markup. The Estimating Basics guide walks through the math, and the free markup and margin calculator does it for you.

See it in Trades HQ

Trades HQ painting calculator preview with primer, paint and masking lines
The painting calculator turns room sizes into primer, paint and supply lines for your estimate. Sample numbers.

Questions painting contractors ask

How do I estimate how much paint a room needs?

Multiply the room perimeter by the wall height, subtract doors and windows, multiply by the number of coats, then divide by the coverage on the paint can. Many paints list roughly 350–400 square feet per gallon.

Can I measure from blueprints?

Yes. You can upload a blueprint PDF, set the scale, and measure walls and areas right on the drawing, then bring those quantities into your estimate.

Can I use Trades HQ on my phone?

Yes. Trades HQ runs in your phone’s web browser, and you can add it to your home screen like an app, so you can build an estimate or send an invoice from the truck.

Is there a free trial?

Yes. Every plan starts with a 14-day free trial, and you don’t need a credit card to start. Plans start at $75 a month, and you can cancel anytime.

Examples on this page use illustrative numbers only. Use your own costs, rates and local requirements. This page is general information, not legal, tax, or financial advice.