We are working on a user friendly calculator, but in the meantime, use the following as a guide:

 

# of People

Average Daily Hours of Event or Function

 1 hr.2 hrs.3 hrs.4 hrs.5 hrs.6 hrs.7 hrs.8 hrs.9 hrs.10 hrs.
500245567891012
100046778911121213
15004779111214161920
200057812151618212325
2500581014172124262933
3000691316202426293336
35007111518232629343944
40008141722253034384348
45009141823283238424751
500010152025303540455055
550012162227343945515965
600013172430384451606774
650013182631405158677480
700014202732435462718089
750014223139485768778996
8000152433455362718394100
8500162635465667748596105
9000172838475768778898107
9500182939485869788999108
100002030405060708090100110
 
Chart retrieved from Carleton Environmental Services, Portable Toilets Ottawa Article