How much paint is required to paint walls and including ceilings of a Hall Room covering dimensions 6m by 6m, considering there are 1 windows and 1 doors and location is in Geneva?

The cost of painting a Hall Room with dimensions 6m by 6m, with 1 windows and 1 doors, located in Geneva, is CHF 887.00.

*) The calculations are approximate, based on a room height of 2.4m, and include one coat of paint. The price covers only the labor, excluding any services or materials.