---
title: "Paint Calculator — How Many Litres or Gallons to Paint a Room"
description: "Calculate how much paint you need for any room. Enter wall dimensions and get results in litres (UK/AU) and gallons (US). Covers 1 or 2 coats, doors, and windows."
url: "https://worldcalculators.org/calculators/paint/"
canonical: "https://worldcalculators.org/calculators/paint/"
---

# Paint Calculator

Calculate how much paint you need for any room. Enter wall dimensions and get results in litres (UK/AU) and gallons (US). Covers 1 or 2 coats, doors, and windows.

## Quick answer

For a typical 12×10 ft room (2 coats): ~4–5 litres, or about 1.25 gallons. Coverage depends heavily on surface porosity — new plaster absorbs far more paint than a previously painted surface. Dulux and Crown (UK) quote 10–12 m²/L on smooth surfaces, but new bare plaster may only achieve 6–8 m²/L on the first coat.

## Frequently Asked Questions

For a typical 12×10 ft room (2 coats): ~4–5 litres, or about 1.25 gallons. Coverage depends heavily on surface porosity — new plaster absorbs far more paint than a previously painted surface. Dulux and Crown (UK) quote 10–12 m²/L on smooth surfaces, but new bare plaster may only achieve 6–8 m²/L on the first coat.
US paint coverage is stated as ft² per gallon (typically 350–400 ft²/gal). UK coverage is stated as m² per litre (typically 10–12 m²/L). These are equivalent on a per-volume basis: 400 ft²/gal ≈ 10 m²/L. The real difference is can sizes: US paint comes in 1 gallon (3.785L) cans; UK cans are typically 2.5L, 5L, or 10L.

Source: https://worldcalculators.org/calculators/paint/
Markdown mirror of the HTML page. Prefer this URL for RAG; the interactive calculator still lives on the HTML page.