# How Do You Convert NM3/h to CFM?

To convert from normal cubic meters per hour to cubic feet per minute, it is necessary to convert normal cubic meters per hour to standard cubic feet per minute first. Once the conversion is made, determine the actual pressure and temperature of the flow, and use a conversion equation to find the flow in cubic feet per minute.

1. Convert normal cubic meters per hour to standard cubic feet per minute

The conversion factor for normal cubic meters per hour to standard cubic feet per minute is 0.622. So, if a flow is measured at 11 normal cubic meters per hour, this converts to 17.7 standard cubic feet per minute.

2. Determine the actual pressure and temperature of flow

Standard cubic feet per minute uses the standard conditions of 14.7 pounds per square inch and 520 degrees Rankine. In order to convert from standard to actual cubic feet per minute, the actual pressure and temperature must be known. Add 460 to the actual temperature in degrees Fahrenheit to convert to degrees Rankine.

3. Calculate the flow in cubic feet per minute.

Use the formula CFM = SCFM / ((Pa / 14.7) * (528 / Ta)) to find the flow in cubic feet per minute. CFM is cubic feet per minute, SCFM is standard cubic feet per minute, Pa is the actual pressure in pounds per square inch, and Ta is the actual temperature in degrees Rankine.