---
title: "Paint Calculator: How Much Paint Do I Need | MCC Solutions"
description: "Enter room size, doors, windows and coats to estimate gallons of paint. Coverage per gallon is editable. Free and private."
url: "https://mcc-solutionsnj.com/tools/paint-calculator"
---

Free tool

# Paint calculator

Estimate gallons for a room's walls. Set the coverage from the paint can label.

Room length (feet)

Room width (feet)

Ceiling height (feet)

Doors

Windows

Coats

Coverage per gallon (sq ft)

Run a small business, or do the books for one? Take the [free books check](/bookkeeping/health-check) or browse the [free Excel templates](/bookkeeping/templates). Want a hand? [Contact us](/contact).

Share

## Put this tool on your own site

Free to use. Paste this where you want it to appear. It runs in the visitor's browser, so nothing they enter is sent to us.

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How it works

## How it works

Wall area is **2 x (length + width) x height**. The calculator subtracts about 21 square feet per door and 15 per window, multiplies by coats and divides by the coverage per gallon. Coverage is printed on the can, and 350 is a common figure.

Example: a 12 by 10 foot room with 8 foot ceilings has 2 x (12 + 10) x 8 = 352 square feet of wall. One door and two windows remove about 51 square feet, leaving 301. Two coats at 350 square feet per gallon need about 1.72 gallons, so buy 2. Dark colors, rough walls and fresh drywall can need more.

FAQ

## About this calculator

**Does this include the ceiling?**

No, only walls. Use the square footage calculator for the ceiling.

**Do I need primer?**

It depends on the surface and the color change. Check the paint's instructions.

**Why round up?**

Paint comes by the gallon and a little extra helps with touch-ups.

**Is anything saved?**

No. The math runs in your browser and nothing you enter is sent to us.

Read the guide: [How Much Paint Do I Need for a Room?](/tools/guides/how-much-paint-do-i-need). See [all free tools](/free-tools). More free tools: [Temperature converter](/tools/temperature-converter), [Weight converter](/tools/weight-converter), [Running pace calculator](/tools/pace-calculator), or [see all free tools](/free-tools).

General information, not tax or legal advice. [How we write and check our tools](/editorial-standards).

Do it yourself

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## Need help with your business?

[Contact us](/contact)[Call (908) 444-6373](tel:+19084446373)