# Paint quantity calculator

> Estimate coverage from wall area, coats and product coverage values.

[Open tool](https://www.toolcabana.com/ps/paint-quantity-calculator) · [Construction and workshop](https://www.toolcabana.com/ps/category/construction-and-workshop)

Tool ID: paint-quantity-calculator. Requested language: ps. Description language: en. Complete guide translation: no; untranslated sections use English.

## Overview (en)

The Paint quantity calculator estimates liters of paint from total wall area, minus window and door openings, multiplied by the number of coats and divided by the coverage per liter per coat, then increased by a waste percentage. Areas are in square meters, coats can be 1 to 10, and coverage should come from the product label.

## Supported tasks (en)

Estimate coverage from wall area, coats and product coverage values.

## Steps (en)

1. Enter the requested values in the settings panel.
2. Adjust the basic settings, then open Advanced mode for export and fine-tuning options. Custom settings stay active when the panel is closed.
3. Run paint quantity calculator, review the output, then use the available copy or download controls.

## Settings

- Total wall area (square metres) (en; key: area; type: number); minimum: 0; maximum: 1000000000000
- Excluded opening area (square metres) (en; key: openings; type: number); minimum: 0; maximum: 1000000000000
- Coats (en; key: coats; type: number); minimum: 1; maximum: 10
- Coverage (square metres/litre/coat) (en; key: coverage; type: number); minimum: 0.01; maximum: 1000000000000
- Waste (%) (en; key: waste; type: number); minimum: 0; maximum: 100

## Limitations (en)

Local bounded calculations. Numeric inputs must be finite and within the visible ranges. Lists and tables have operation-specific limits. Models, estimates and supplied rates must be checked against your intended use.

## Privacy and connections (en)

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

## Questions (en)

### How much paint do I need for a room?

Enter the total wall area and the area of openings in square meters. With the defaults of 50 m² walls, 5 m² openings, 2 coats, 10 m² per liter and 10 percent waste, the estimate is 9.9 liters.

### What formula does the paint calculator use?

Liters = (wall area - openings) × coats ÷ coverage × (1 + waste ÷ 100). Coverage is the square meters one liter covers in one coat. Check the value against the manufacturer data for your surface and product.

### Where do I find the coverage value for paint?

Use the coverage stated on the paint tin or technical data sheet, in square meters per liter per coat. Rough or porous surfaces usually cover less area, so a lower value gives a more cautious estimate.

### Where is my input processed?

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

### What are the input limits?

Local bounded calculations. Numeric inputs must be finite and within the visible ranges. Lists and tables have operation-specific limits. Models, estimates and supplied rates must be checked against your intended use.

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