If you want to convert Nm3 H to CFM there are many ways to calculate the conversion rate and technique. There are free converters available online. Formulas for conversion are found just as easily online as well with a quick use of your favorite search engine. You can't convert Nm3 to CFM, but you can convert to cubic feet, and this formula will help you do just that: 1m? x (1 ft/0.3048 m)? = 35.315 ft? and 1 m?/h x (1 ft/0.3048 m)? x 1 h/60 min = 0.58858 ft?/min. This is true at any temperature and pressure, provided you are only converting the units at the same temperature and pressure.