Paint Calculator
How much paint do you need? Wall and ceiling area, coats and paint type give the litres and gallons of emulsion, weather-coat, enamel or distemper.
Loading the calculator… (JavaScript is needed)
About this calculator
Work out the paint for a room or a whole house: enter the wall length and height, ceiling area and openings, choose the paint and number of coats.
How it's calculated
- Area = wall length × height + ceiling − openings
- Litres = area × coats ÷ coverage per litre per coat
- 1 gallon = 3.64 litres (paint gallon sold in Pakistan)
How much area does 1 gallon of emulsion cover?
Roughly 350–400 sq ft per coat on smooth plaster.
Results are calculated from the values you enter using standard formulas. Download the PDF to keep a record. For certified testing, design or construction, talk to our engineers.
Kataria Engineering & Consultancy Services (2026). Paint Calculator [online calculator]. https://katariaengineering.com/tools/paint-calculator.html
Building or renovating?
Get an item-wise BOQ for the whole house, or a fixed quotation from our engineers.