If you are starting up a compressor that has been off, let the tank fill completely once before starting your timing and recording of results. Also watch the tank gauge during this time and record the PSI, both when the compressor starts and stops running.
Using a stopwatch (there is one on your smartphone), time how long it takes from when the compressor starts running to the time it stops running.Start the compressor and measure the time of the load and unload cycles on the tank gauge.Convert the capacity of the tank to cubic feet.Let’s work backwards with our formula and see what we get. The air compressor cfm psi calculator formula is: CFM = Tank Volume in Cubic Feet x Standard Pressure (ATM) during a cycle x Cranks per MinuteĮxample: 15 HP Compressor with a 132 Gallon Tank rated for 125 PSI and 54.9 CFM. When customers call us trying to learn about the physics behind compressed air and wanting to understand what is best for them, they ask “how to measure compressed air flow rate?” It may seem complex, but it really is quite easy to do yourself (though our calculator makes it much easier!). How Do You Calculate CFM for an Air Compressor? Utilizing the Tank Pump-Up Time method, let’s test the efficiency & calculate the CFM of your compressed air system
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Free Online Air Compressor CFM Calculator Read our blog post about Properly Sizing a System to learn more. When calculating how much your air compressor’s output rate needs to be, you not only need to consider the requirements of each of your tools, but also how often/how long they will run for.Another fact to consider is how much of your equipment will be running at the same time?ĭownload a copy of our Air Consumption Calculator for a listing of the air demand of most air driven tools and a handy calculator to figure out what your operation needs, then use the air flow rate calculator. Each piece of production equipment will have a CFM (airflow) requirement. Use our air compressor CFM calculator below to help you to quickly and easily calculate your CFM!īetween CFM & PSI, these two measurements essentially define whether a compressor can meet the demand of your equipment. Too much pressure can damage the equipment and cause unexpected malfunctions.
Too little pressure means the job won’t get done. In compressed air terms, pressure delivers the force, yet horsepower delivers the flow. The compressor must provide the right amount of pressure, or force, needed to complete the process.
It expresses the compressor’s ability to perform a specified amount of work at any given point in time. PSI (Pounds per Square Inch) is the “Pressure”. With insufficient flow, the compressor will require breaks to rebuild pressure in the compressor’s reserve tank. It expresses the amount of flow needed and depends on the length of time required to complete the task. What is the Relationship Between CFM and PSI?ĬFM is the “Flow” or the compressor’s ability to continue performing a certain task over time. In compressed air, this means it is a measure of the flow or output rate that air is coming out of your compressor.
It is a measurement of how fast air flows into or out of a space. CFM is the abbreviation for cubic feet per minute (cu ft/min).
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