Welcome to my parts-per billion to parts-per million converter, also known as the parts-pb to parts-pm converter.
Use the form below to convert parts-per billion (parts-pb) into parts-per million (parts-pm) and if you want to read an explanation of how to convert parts-per billion to parts-per million with step-by-step instruction just click the "Explain" button.
You can also check the Quick Conversions box in the right menu for some preset calculations that are commonly searched for.
All Parts per Unit Converters
The list below contains links to all of our parts per unit converters.