How to calculate Quantity for Paint work ?

Types of Gallon

UK Gallon = 4.54 Litters
US Gallon = 3.785 Litters


UK Gallon

UK Gallon can cover (350) sq.ft. of wet area (for smooth wall).

UK Gallon can cover (200) sq.ft. of dry area (for rough wall).


US Gallon

US Gallon can cover (290) sq.ft. of wet area (for smooth wall).

US Gallon can cover (165) sq.ft. of dry area (for rough wall).



For UK Gallon


For wet wall

Area of wall = Length x Height

= 40 x 12

= 480 sq.ft.

= 480 sq.ft / 350

= 1.3714 UK Gallon


For dry wall

Area of wall = Length x Height

= 40 x 12

= 480 sq.ft.

= 480 sq.ft / 200

= 2.40 UK Gallon


For US Gallon


For wet wall

Area of wall = Length x Height

= 40 x 12

= 480 sq.ft

= 480 sq.ft / 290

= 1.6531 US Gallon

For dry wall

Area of wall = Length x Height

= 40 x 12

= 480 sq.ft.

= 480 sq.ft /165

= 2.9090 US Gallon