Instructions
Find a conversion table. These tables can be found at the library or online. Websites such as Dry Technic, Dew-Point and ASGE online offer conversion charts. The links to these websites can be found in the "Resources" section.
Locate your dew point temperature on the chart. Be sure to note whether the temperature is in Celsius or Fahrenheit. On some conversion charts, you may also need to note whether the dew point is atmospheric or line pressure.
Find the corresponding ppm on the conversion chart. The standard ppm will be listed in a volume basis. Some conversion charts also list the ppm in weight.
Replace the dew point with the corresponding ppm.