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Calculator for toilet pans, basins and urinals

This calculator was developed to simplify the calculation of the number of toilet pans, basins and urinals in buildings.

The calculator:

  • Is designed to be used to be used in conjunction with Acceptable Solution G1/AS1
  • Uses the method contained in G1/AS1
  • Is intended for use by designers and building consent authorities
  • Does not change the requirements that have been in place since 2000
  • Is guidance under section 175 of the Building Act 2004

Limitations
The calculator, on its own, will not produce a building code compliant solution as it does not cover:

  • Allocation and distribution of accessible toilet facilities
  • Definition of, or the distribution of unisex toilet facilities
  • Space requirements for toilets or accessible layouts
  • Privacy
  • Calculation of showers

The user should note the ‘occupant density’ menu option list is extensive and allows for a number of different building uses. Not all of the options on the ‘occupant density’ menu will be relevant to the selected building use.

For more information, please see the FAQs

Calculate the number of toilet pans, basins and urinals here.

 

The calculator is intended as a guide only and is issued as a guidance material under s175 of the Building Act 2004. While the Department has taken care in producing this calculator, this calculator is not a substitute for professional advice, and advice should be sought on establishing compliance with the relevant building code clauses.