You are operating a variable area flowmeter that has been calibrated for:

* a specific fluid
* a specific operating pressure
* a specific operating temperature

You now want to operate it under different conditions and need to determine the actual flow rate. This calculation converts the volumetric flow rate to standard conditions (mass flow rate).

Enter the original calibration values for your instrument and, if necessary, select different units. For gas flowmeters, the calibration values are indicated on the measuring tube. Then enter the values for the new fluid and/or the modified operating conditions.

The calculation is performed automatically when you press **Enter** or leave a field.

The new flow rate is displayed in the last line. It is rounded to four decimal places.