Formula/Conversion Tables

Study materials to help you succeed

WPI/ABC standardized exams include a Formula/Conversion Table to assist examinees. These tables contain mathematical formulas and define common abbreviations that may be present on a WPI/ABC exam. 

Please contact the certifying authority for your state, province, or geopolitical region to determine which exam preparation materials are appropriate for your jurisdiction and exam date.

The following Formula/Conversion Tables are available in PDF format by selecting the links below. Formula/Conversion Tables may be reproduced with written permission from testing@gowpi.org


Water Treatment, Distribution, Water Laboratory Analyst


Wastewater Treatment, Collection, Industrial Waste, Wastewater Laboratory Analyst


Plant Maintenance


Biosolids Land Application

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