Paint Quantity Calculator

Accurately estimate the amount of paint (litres or kg) required to paint a given surface area.

Determine Your Paint Needs

Paint Quantity Calculator

Surface Area to be Painted

Calculate wall or surface area by entering length and height/width values.

Wall 1

Length:

Height:

Wall 2 (Optional)

Length:

Height:

Gaps (Door/Window)

Enter the total area or dimensions of areas such as doors and windows that will not be painted and deduct them.

No spaces were added.

Paint Details

Paint Coverage Rate (area covered by 1 litre of paint): m²/liter

This value is written on the paint packaging. It is usually how many square meters of area 1 liter of paint can paint in one coat.

How Many Layers of Paint Will Be Used: floor

Generally, 2 coats of paint are recommended, but can be increased depending on the condition of the surface or color change.

Paint Density (kg/litre): kg/liter

If you want to see the amount of paint in kilograms instead of liters, enter its density. It is usually written on the paint can.

Paint Waste Rate (%): %

Percentage added for spills, waste or brush/roller losses that may occur while painting.

This calculator helps you estimate the amount of paint (in litres or kilograms) needed to paint an area. Factors such as wall/surface dimensions, gaps such as doors and windows, paint coverage, number of coats to be applied and possible wastage rates are included in the calculation.

Net Area to be Painted = (Total Wall Areas) - (Total Clearance Areas)

Required Paint (Liters) = (Net Area to be Painted × Number of Layers / Paint Coverage Rate) × (1 + Waste Rate / 100)

Paint Required (Kg) = Paint Required (Litre) × Paint Density

Net Area to be Painted: Actual area to be painted after deducting doors, windows, etc. (m²).
Paint Coverage Ratio: The area that 1 litre of paint can paint in a single coat (m²/litre). It is stated on the paint packaging.
Number of Floors: How many layers of paint will be applied.
Paint Density: Weight of paint per litre (kg/litre).
Waste Rate: Percentage (%) added for possible spillage, wastage or absorption differences during dyeing.

Important Note: The values in this calculator are estimates, many factors such as the absorbency of the surface, the quality of the paint, the application method (brush, roller, spray) and the workmanship can affect the actual paint consumption. Especially in professional projects or large areas, it is always useful to have some extra paint (keep the waste rate high) or to consult an expert.

Why is Paint Quantity Calculation Important?

Painting a space is both costly and time-consuming. Calculating the amount of paint needed correctly is crucial for the **efficiency, budget control and environmental impact** of the project:

Cost Savings: Ordering enough paint can prevent downtime and additional shipping costs, while purchasing too much paint can create unnecessary expense and storage problems.
Time Management: Starting with the right amount will help you complete the job on time. Waiting for a shortage of materials can delay the project schedule.
Reducing Waste: Buying more paint than necessary can lead to discarding unused products, which is both an economic and environmental burden.
Homogeneous Result: Starting with enough paint at once minimizes problems such as color tone differences (especially in large areas).

Paint Coverage Rate and Number of Layers:

Two of the most important factors affecting the amount of paint are the **paint coverage rate** and **number of layers to be applied**.

Paint Coverage Rate (m²/liter): It shows how many square meters of area one liter of paint can paint in a single coat. This value varies depending on the type of paint (water-based, oil-based), quality, pigmentation and absorbency of the surface. It is usually stated on the paint can. Rough surfaces or highly absorbent surfaces consume more paint.
Number of Floors: Two coats of paint are usually required to achieve a good finish. However, if you are changing a dark color to a light color or if the surface is very imperfect, three or more coats may be required. Single-coat sealers are also available but are usually more expensive.

Importance of Gaps and Waste Rate:

When calculating the wall area, deducting **gaps such as doors and windows** prevents unnecessary paint purchases. Since these areas will not be painted, they should be subtracted from the total surface area.

**Waste rate** is the excess added to compensate for losses that inevitably occur during the dyeing process. These losses may include:

Paint may drip from the roller or brush.
The surface may be more absorbent than expected.
Additional paint may be required for color matching or touch-ups.
The unusable amount left at the bottom of the paint can or stuck to the brush/roller.

For typical interior painting, a waste rate of 5-10% is considered safe. For professional applications or complex surfaces, this rate can be increased.

Application Areas:

Home and Office Renovations: The exact supplies you need for room or office painting projects.
Commercial Areas: Painting cost and material planning for shops, restaurants and other commercial spaces.
Exterior Paintings: Large-scale calculations for painting exterior facades of buildings.
Artistic and Decorative Projects: Estimated material requirements for painting specific surfaces.

The information provided by this calculator is for general planning and estimating purposes. Variables such as the condition of the surface (roughness, absorbency), specific properties of the paint (quality, viscosity), application tool (brush, roller, spray) and quality of workmanship can significantly affect the actual paint consumption. For delicate projects or large-scale applications, it is always recommended to consult a paint specialist or supplier. Hesapkolik is not responsible for any inaccuracies or errors that may arise from the use of this calculator.