Paint Coverage Calculator.
Estimate paint litres from area, coverage rate, coats and waste allowance.
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Instant Results
Paint required
11.0litres
Estimated litres including waste.
Total coated area
100.0m2
Area multiplied by coats.
Explanation
What this calculates
The surface area is multiplied by coats, divided by product coverage and adjusted for waste.
Formula
Litres = area x coats / coverage rate x (1 + waste %)
Inputs are validated on screen and converted where unit options are available.
Worked Example
Example result
50 m2 at 10 m2/litre with 2 coats and 10% waste needs about 11 litres.
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Templates
Document the result
Software
Turn it into a workflow
Learn before you act.
More related articles are planned for this section.
Calculator questions.
Where do I find coverage rate?
Use the paint manufacturer data sheet and allow for substrate, method and site conditions.
Does primer count as a coat?
Estimate primer separately when it uses a different product or coverage rate.
Next Step
Make estimates part of the job record.
Zektrx connects calculators, templates, articles, evidence, actions, pricing and free trial routes so one-off estimates can become repeatable contractor workflows.