What is SCFM

SCFM (Standard Cubic Feet per Minute) is a unit of measurement used to express the flow rate of a gas under standard conditions of temperature and pressure.

It represents the volume of gas, in cubic feet, that passes through a pipeline or other opening in one minute when the gas is at standard conditions, which are typically defined as 20°C (68°F) and 1 atmosphere of pressure.

SCFM is commonly used in engineering and industrial applications to assess the performance of compressors, heating and cooling systems, gas flow systems, and pneumatic tools, among others.

When selecting equipment or designing systems that involve gas flow, it is important to consider the SCFM requirement to ensure that the equipment or system can handle the desired flow rate effectively.

Note that SCFM is a flow rate measurement and should not be confused with other units of volume or capacity.

How to Estimate CFM

To calculate the CFM, you need to know the SCFM, actual temperature, actual pressure, barometric pressure, and relative humidity. The formula is:

CFM = SCFM × \(\frac{P_s - (RH_s \times P_{vs})}{P_b - (RH_a \times P_{va})} \times \frac{T_a}{T_s} \times \frac{P_b}{P_a}\)

Use the form above to input the values, and the calculator will provide the required CFM.