Castle Paint Calculator
Easily calculate the amount of paint you'll need for your project with our paint calculator guidelines.
Whether you're refreshing a single room or tackling an entire home, our paint calculator provides guidance based on room dimensions, ceiling height, and the number of coats required.
Small Room
Based on an average ceiling height of 2.6m, a small room approximately 2m x 2m would require around 2.5 litres of paint for two coats on all walls.
For painting with dark colours or covering a dark colour with a light one, an additional coat may be needed. In such cases, it is advisable to purchase 5-litre of paint to ensure you a suffient quantity to cover all walls.
For freshly plastered walls, apply a base coat before painting. This base coat can be white or your chosen paint colour, thinned with 20% water before application.
Medium Room
Based on an average ceiling height of 2.6m, a medium room approximately 4m x 4m would require about 5 litres of paint for two coats on all walls.
For dark colours or when covering a dark colour with a light one, an additional coat may be necessary. In such cases, it is advisable to purchase 10 litres to ensure you have sufficient paint to cover all walls.
For freshly plastered walls, apply a base coat before painting. This base coat can be white or your chosen paint colour, thinned with 20% water before application.
Large Room
Based on an average ceiling height of 2.6m, a large room approximately 8m x 8m would require about 10 litres of paint for two coats on all walls.
For dark colours or when covering a dark colour with a light one, an additional coat may be needed. In such cases, it is recommended to purchase 15 litres to ensure you have sufficient paint for all walls.
For freshly plastered walls, apply a base coat before painting. This base coat can be white or your chosen paint colour, thinned with 20% water before application.
Internal Doors
For a standard door size of 80 inches by 30 inches, a 750ml can of paint should be enough to cover the door with two coats.
If you are painting with a dark colour or covering a dark colour with a light one, an additional coat may be needed. In this case, it is advisable to purchase 1 litre to ensure you have a sufficient quantity.
Explore our colour collections
Endless colours, endless possibilities
Whether you prefer bold and vibrant hues or soft and soothing tones, our wide range of colours provides limitless possibilities for your home. Powered by internationally renowned NCS Colour, NCS @ Castle is a range of exceptional quality interior and exterior wall and trim paints designed to provide long lasting protection to surfaces while enhancing the aesthetics of your home.
Need something colour matched?
Colour matching service
At Castle we offer advanced colour matching and bespoke colour creation services tailored to meet the exact needs of our customers. Using an advanced colour analysing spectrophotometer, we can precisely match any colour in any finish. Reach out to us now to let us know what you need.