“How much paint do I need?” Plan your home painting project with our calculator to estimate the amount of paint needed for painting walls or surfaces. This estimation assumes two coats of paint will be used, as this is the recommended application method along with one coat of sealer for a professional paint finish.

1

Surface Dimensions

2

Exclude Areas

3

Results

1Calculate surface dimension

Measure the width and height of each surface you want to paint.

surface_dimentsions
ft
ft

Not sure about the dimensions?

Try Quick Estimator

2How many doors or windows are there?

The calculation will exclude any doors and windows in the room

*A standard door accounts for 20 square feet/2 m2 and windows are an average 10 sq feet/ 0.5 m2

door-icon
window-icon
RESULTS

Here's how much paint you will need

Based on the approximate surface area, this is the estimated amount of paint required.

How we calculate
Surface Area

Paint required

2-coat application

Sealer/Primer required

Half of the recommended paint amount

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PLEASE NOTE

*This calculation is based on the assumption that 2 coats of paint will be used.

*Note that this estimate is based on theoretical coverage; actual coverage may vary due to factors such as surface texture, application method, dry film thickness, and environmental conditions. For more precise calculations, refer to our TSDS or contact us for assistance.

Paint Calculation FAQs

Divide the room into smaller sections or squares to simplify the process. Then, measure the length and width of each section individually to get the area. Add the areas of all sections together to determine the total area of the room.

Calculate trim and skirting areas separately: If you plan to paint the trim a different colour, calculate these areas by multiplying the length by the width of each trim.

Yes, textured walls affect the amount of paint required. Uneven surfaces with grooves, bumps or crevices require more paint to cover compared to smooth walls.

Tips for painting textured walls:

  • Apply several thin coats to ensure no paint pools in the crevices
  • Use a roller with a thicker surface (longer nap) to get into the nooks and crannies
  • Use brush techniques like stippling or swirling to cover the textured areas better.
  • First, ensure a clean and dry surface before painting.
  • Apply a coat of sealer or primer before going in with the topcoat. This ensures a smoother base and better paint adhesion.
  • Use the right painting tools for your project – brushes for edges or details, and rollers for larger areas.
  • Follow the recommended drying times between coats to avoid paint streaks, uneven patches or bubbling.

Follow Nippon Paint’s recommended paint system of 1 coat of sealer and 2 coats of topcoat to ensure a professional-looking and long-lasting paint finish.

Surface Preparation:
Clean and scrape the surface to remove any loose paint, debris, or imperfections. Smooth uneven areas by sanding lightly with fine sandpaper. Wipe with a damp cloth and allow to dry completely before painting.

Masking:
Use masking tape to protect edges and trims. Press the tape firmly for sharp lines, and remove it at a 45° angle before the paint dries completely.

Prime/Sealing:
Apply the recommended primer or sealer for better paint coverage, especially on dark colours or unpainted surfaces. This is to ensure better paint adhesion and a uniform, even base for your topcoat.

Better coverage & smoother finish: A second coat ensures full coverage by hiding any areas the first coat might have missed, eliminating visible streaks or uneven spots, small imperfections and brush marks, giving your walls a smooth, professional look.

Increased durability: Two layers of paint create a stronger, more durable painted surface, protecting against scratches, peeling, and fading over time.

Improved moisture protection: A second coat provides better defence against moisture, reducing the risk of water damage, especially in damp areas.

Paint Calculation FAQs

Divide the room into smaller sections or squares to simplify the process. Then, measure the length and width of each section individually to get the area. Add the areas of all sections together to determine the total area of the room.

Calculate trim and skirting areas separately: If you plan to paint the trim a different colour, calculate these areas by multiplying the length by the width of each trim.

Yes, textured walls affect the amount of paint required. Uneven surfaces with grooves, bumps or crevices require more paint to cover compared to smooth walls.

Tips for painting textured walls:

  • Apply several thin coats to ensure no paint pools in the crevices
  • Use a roller with a thicker surface (longer nap) to get into the nooks and crannies
  • Use brush techniques like stippling or swirling to cover the textured areas better.
  • First, ensure a clean and dry surface before painting.
  • Apply a coat of sealer or primer before going in with the topcoat. This ensures a smoother base and better paint adhesion.
  • Use the right painting tools for your project – brushes for edges or details, and rollers for larger areas.
  • Follow the recommended drying times between coats to avoid paint streaks, uneven patches or bubbling.

Follow Nippon Paint’s recommended paint system of 1 coat of sealer and 2 coats of topcoat to ensure a professional-looking and long-lasting paint finish.

Surface Preparation:
Clean and scrape the surface to remove any loose paint, debris, or imperfections. Smooth uneven areas by sanding lightly with fine sandpaper. Wipe with a damp cloth and allow to dry completely before painting.

Masking:
Use masking tape to protect edges and trims. Press the tape firmly for sharp lines, and remove it at a 45° angle before the paint dries completely.

Prime/Sealing:
Apply the recommended primer or sealer for better paint coverage, especially on dark colours or unpainted surfaces. This is to ensure better paint adhesion and a uniform, even base for your topcoat.

Better coverage & smoother finish: A second coat ensures full coverage by hiding any areas the first coat might have missed, eliminating visible streaks or uneven spots, small imperfections and brush marks, giving your walls a smooth, professional look.

Increased durability: Two layers of paint create a stronger, more durable painted surface, protecting against scratches, peeling, and fading over time.

Improved moisture protection: A second coat provides better defence against moisture, reducing the risk of water damage, especially in damp areas.