How do I calculate how much paint I need?

Enter room dimensions (wall length, height, number of doors/windows) and the tool estimates paint quantity.

What paint types are supported?

Matte, satin, semi-gloss, and gloss with different coverage rates.

Yes, this tool is 100% free to use online with no registration or payment required. No hidden charges.

Absolutely. All processing is done locally in your browser. No data is uploaded to any server or stored anywhere.

What browsers are supported?

Chrome, Firefox, Safari, and Edge are fully supported. The tool works on both desktop and mobile devices.

Are there usage limits?

No, you can use this tool as many times as you need. There are no daily limits or usage caps.

Does it work offline?

After the page loads, the tool works entirely in your browser. No internet connection is needed for processing.

Paint Calculator - How Much Paint Do I Need?

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Updated: 2026-07-11

Room Dimensions

Length (m)

Width (m)

Height (m)

Doors

Windows

Paint Settings

Coats

Coverage (m²/L)

Include ceiling Include primer (1 coat)

Results

5.6 L

Total Paint Needed

💡 Consider buying 10-15% extra for touch-ups and waste.

50.4Wall Area (m²)

20.0Ceiling Area (m²)

70.4Total Area (m²)

0.0Primer (L)

5.6Top Coat (L)

7.0Buy (L)

About Paint Calculator

Free online paint calculator. Estimate how much paint you need for your room. Enter room dimensions (length, width, height), number of doors and windows. Auto-calculates wall area and required paint volume. Supports multiple coats (primer + top coat), different paint coverage rates, and special surfaces. Perfect for home improvement, renovation planning, and budget estimation. Client-side only, no data upload.