Paint Coverage Calculator
Use this ceiling paint coverage calculator to estimate how many litres of paint you need based on area, coverage, and number of coats.
What This Calculator Does
This calculator takes paintable area, litres-per-square-metre coverage, and the number of coats, then estimates total litres required. It is useful for walls, ceilings, and exterior surfaces. This version is framed for ceiling painting work so the page feels more relevant to the jobs that audience actually prices.
How to Use
- Enter total paintable area.
- Enter the coverage rate per litre.
- Enter the number of coats.
- Click calculate.
Example
If you need to paint 120 square metres with two coats and your paint covers 12 square metres per litre, the calculator estimates the litres required. This is especially handy when pricing ceiling painting jobs where speed matters.
Why This Calculation Matters
Paint jobs are easy to underquote when the litres are guessed. A quick coverage calculation makes pricing and ordering more accurate. For ceiling painting work, small pricing errors repeat quickly across lots of jobs, so getting the number right matters even more.
Common Mistakes
- Using floor area instead of wall area.
- Forgetting extra coats.
- Not checking manufacturer coverage rate.
- Ignoring waste, porous surfaces, or touch-up allowance.
FAQs
Does this work for walls and ceilings?
Yes. Just enter the total area you actually need to paint.
Should I add extra paint?
Usually yes, especially for touch-ups, porous surfaces, or strong colour changes.
Why does coverage vary?
Coverage depends on product type, surface texture, and how many coats are needed.