(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': And its there for a very important reason. The flow rate in other units can be determined by converting them into cubic feet per minute before and after using the formula. Getting CFMs from SCFM is relatively easy. We have calculated an SCFM to CFM chart for pressures ranging from 10 to 20 psi and temperatures ranging from 0F to 100F to illustrate whats the SCFM vs CFM difference at various conditions: Here are converted 100 SCFM airflow values to CFM at various temperatures and air pressures at 36% relative humidity: As we can see from the chart above, CFMs increase with increasing temperature and decreases with increasing pressure. Thus, you can use it to identify if the air compressor's tank is strong enough for what you need to power a specific air tool. You can also call us at 508-548-6686 or email us at sales@falmouthproducts.com. For more information about this conversion, click here. SCFM is determined using standard conditions. An example is the centrifugal fan, which is a constant CFM device. Brave Fighter Dragon Battle Gift Codes (updated 2023), Bloody Treasure Gift Codes (updated 2023), Blockman Go Adventure Codes (updated 2023). Management, Inc. DISCLAIMER: Terms and Conditions for using the ACFM-SCFM Calculator "dateModified" : "2022-07-31T13:09:56-04:00", As the SCFM refers to the air pressure capacity in a standard condition, having a higher rating means the stronger your air compressor is. Table 1 gives the numerical values for 29.92/P. System Integration The result you get is the total pumps in cubic feet by the air compressor during the filling. How many SCFM airflow were talking about here? scfm = Standard Cubic Feet per Minute For practical purposes, a numerical method for solving the above equation can be used if the temperature is 60F (15.5C). implied on its accuracy. CFM or Cubic Foot Per Minute is a unit of air flow. r.src=t+h._hjSettings.hjid+j+h._hjSettings.hjsv; The same concept for volume applies for rotameters, except that the volume of gas is moving. Density varies directly with pressure and inversely with temperature. 322166814/www.reference.com/Reference_Mobile_Feed_Center3_300x250, How My Regus Can Boost Your Business Productivity, How to Find the Best GE Appliances Dishwasher for Your Needs, How to Shop for Rooms to Go Bedroom Furniture, Tips to Maximize Your Corel Draw Productivity, How to Plan the Perfect Viator Tour for Every Occasion. 400 CFM. 1 Cubic foot per hour is approximately 0.000 007 865 790 72 cubic meters per second. accuracy of this calculator nor do we accept responsibility, whether directly or indirectly for any Explore proven fluid control solutions designed for your needs and applications. Gas Flow Calculator - Xchanger As you may remember, density = mass/volume. Air Compressor Systems 10 Difference Between CFM and SCFM (With Table) } CFM stands for Cubic Feet per Minute. Atmospheric pressure = 14.7 psi Room temperature = 68 degrees Fahrenheit Relative humidity = 36 percent Air density = 0.075 lbs/cu.ft When the capacity of a heating or cooling unit is expressed in SCFM, these are the conditions the value assumes. What department to direct you inquiry to. We need to heat up an air flow of 25 CFM at a pressure of 30 psig, and 90F up to 200F. "@type":"TechArticle", He is a physicist passionate about making science more accessible to our readers. Web: vacuu-lan.com Get Social . These applications will - due to browser restrictions - send data between your browser and our server. The full form of SCFM is Standard Cubic Feet per Minute. To get a quick understanding of the differentiation factors of CFM and SCFM, check out the below chart. 2280 Chicopee Mill Rd SW Here is the complete SCFM to CFM formula we derive further on: CFM = SCFM (14.7 psi Pactual ) (Tactual + 459.67) (68F + 459.67). Now, in most cases, we dont have exactly 1 atm pressure and 68F pressure temperature, and so on. The standard CFM, SCFM, remedies this by correcting the CFM value to a standardized condition of temperature and pressure. The formula for calculating CFM from SCFM is, CFM = SCFM (Standard Pressure Actual Pressure) (Actual Temperature + 459.67) (Standard Temperature + 459.67). A standard percentage of humidity is considered to estimate SCFM. PRM Filtration, a division of Product Recovery Management, does not guarantee the Many people use these terms interchangeably, but when you want to measure the rate of flow of a gas or any other mass in an industry, it is preferable to use the standard cubic feet per minute measurement instead of the CFM. Divide the total pumps in cubic feet by the time it took to refill the tank (in seconds). Difference Between CFM and SCFM CFM values are taken under the pressure of 90psi, whereas to calculate scfm, the air is expanded to a standard condition around 14.7 psia. "telephone" : "+1-828-684-3766", Google use cookies for serving our ads and handling visitor statistics. Site Map, Products "telephone" : "+1-828-684-3766", And once I didnt care about these at all. ga(function(tracker) { Inspect the refilling time and write it down in seconds on paper. If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. Our experiences and talents are well diversified. Basically, its the output of the airflow rate of gas or air-driven machines. 1 cu ft/h 0.00000786579072 m 3 /s. })(window,document,'https://static.hotjar.com/c/hotjar-','.js?sv='); ] Unlike heavy HAVAC, most air-driven tools are manufactured for light jobs. Step 2: Measure the Air Pressure During Refilling, Step 4: Calculating the CFM of an Air Compressor. Not all air is the same. The gas takes up 1 SCF or .5 ACF within that tank. If you compare the CFM to SCFM, the CFM unit doesnt tell us anything about temperature (T), pressure (P), humidity levels, and so on. What is SCFM in Air Compressors - SCFM vs. CFM Explained - NiGen We need to heat up an air flow of 200 CFM from 60F up to 200F using a blower operating at a static pressure of 2 in.H2O. Can you convert SCFM to CFM? - Daily Justnow SCFM = (25)*(44.7/14.7)*(528/550) = 73 SCFM. Though people use 1 atm (standardized atmosphere) in the typical calculation, it doesnt remain the same in all cases. = 4.5 x CFM x h (std. has no further obligation to provide maintenance, support, updates, enhancements or modifications. }, Employment Table of conversion factors for scfm unit conversion . This can be seen from taking a look at the ideal gas law. The only way to change standard volume is by adding or reducing mass. Because of the difference in pressure and temperature, 400 SCFM will not equal 400 CFM. This relationship is derived from the ideal gas law, which uses the absolute pressure reading and the absolute temperature scale. SCFM is more indicative of how the gas which is pressurized to a standard value will perform at the end point applications. '&l='+l:'';j.async=true;j.src= Pstd = standard absolute air pressure (psia) Pact = absolute pressure at the actual level (psia) Psat = saturation pressure at the actual . The mass flow rate is equal whether the flow is stated in CFM or SCFM. "logo": "https://farnam-custom.com/_assets/images/logo.png", The balloon is taken into a hotter temperature, and the gas expands to 2 cubic feet because of reacting to the heat. Hathaspace Smart True HEPA Air Purifier Reviews, 4+6 Best Whole-House Dehumidifiers (Ducted, Portable), 4 Quietest Dehumidifiers (Best Bedroom Dehumidifiers): 52.1 dB Or Lower, Understanding SCFM (Standard Cubic Feet Per Minute), Understanding CFM (Cubic Feet Per Minute), SCFM To CFM Calculator (Convert SCFM To CFM), SCFM To CFM Chart (From 10-20 psi And 0-100F), Understanding COP: Coefficient Of Performance Of Heat Pumps. As long as the centrifugal fan speed remains constant, the volumetric flow rate is constant. If you have any other questions, you can use the comments below and well try to help you out as best we can. There are two types of measurement units, one is the SI units and the other is the non-SI units. If you have spoken with a team member in the past. of the actual air. There are many standard conditions for pressure, temperature and even standard relative humidity, so while choosing a standard condition care must be taken. Isolating the mass of the gas being moved (m) and dividing by the time it takes to move it gives the following expression: m/t = d(V/t). SHARING IS . (NEC Code), Refrigerant GWP Chart For 61 Freons (R410A, R134A, R22, etc. For other calculators, click here. The difference between what you see on the rotameter and what you may have expected to see may be SCFM vs. ACFM flow. "contactPoint" : [ "name" : "Tutco-Farnam Custom Products", Conversion Between Standard Flow (SCFM) and Actual Flow (ACFM) Calculate Reset Print. Thats the CFM to SCFM conversion. Save my name, email, and website in this browser for the next time I comment. SCFM includes the standard metric of temperature, which is 68-degree Fahrenheit. Replacement Parts This calculator is for converting SCFM (Standard Cubic Feet per Minute) into ACFM (Actual Cubic Feet Per Minute). However, in air-driven tools, there are different ratings of SCFM and PSI depending on the tools type. nl to cfm - OnlineConversion Forums Gas Flows converter | MMSCFD | SCFM | Sm/h | Nm/h | units "name" : "Dexter Diepholz" Youll need to deduct the kick-in PSIG from kick-out PSIG. A volumetric flow rate with units of CFM implies that the flow rate was measured at actual conditions (actual pressure, actual temperature). CFM doesnt consist of standard temperature. Unit Descriptions; 1 Cubic Foot per Minute: A flow rate of 1 cubic foot per minutes. CFM = 350 (14.7 15) (60-degree Fahrenheit + 459.67) (68-degree Fahrenheit + 459.67) So, the CFM will be = 527.67 SCFM is calculated at a lower pressure which makes the air volume larger, and so, SCFM is always a bigger number than CFM. a.appendChild(r); To adequately convert SCFM to CFM, we use the following SCFM to CFM formula: CFM = SCFM (14.7 psi Pactual ) (Tactual + 459.67) (68F+459.67). Engineers often refer to CFM as Actual Cubic Feet per Minute (ACFM) to underline the relationship between airflow and air density. PRM Filtration Airflows up to 25000 SCFM. Cookies are only used in the browser to improve user experience. 7:00AM - 3:30PM "@type": "Organization", The most common standard used in the United States is with sea-level properties (NIST and OSHA). I understand Tutco shares personal data with When the gas is released into a balloon, there will be more than .5 ACF because of the change of pressure, but still 1 SCF. But finding the actual CFM requires multi-stage measures. Cubic Feet per Minute = CFM = ft.3/minute at actual conditions, Standard Cubic Feet per Minute = SCFM = ft.3/minute at standard conditions (1 atm = 14.7psi, 68F ). ", Besides, these are mainly powered by portable air compressors. It determines the volume of air that is being moved. SCFM is based on a standard relative humidity of 36%. Your email address will not be published. Suppose there is highly compressed gas in a tank. SCFM is always a bigger number than the CFM as it is calculated at lower pressure which makes the air volume larger. For Case 1, if we had merely plugged in 25CFM into the above equation, we would have been undersized by a factor of about three. By entering my personal information into the contact forms, I hereby give consent to TUTCO to collect, Inlet Cubic Feet per Minute - ICFM - is used by compressor vendors to establish conditions in front of additional equipment like inlet filter, blower or booster. Knowing what each of them means will help us illustrate the main SCFM vs CFM differences: If you check the Ideal Gas Law, you can see why not all air (gas) is the same. PRM Filtration, a division of Product Recovery Management, does not guarantee the SCFM - Standard cubic feet per minute (gas) Sm^3/hr - Standard cubic metre per hour defined at 15 deg. Modern Slavery & Human Trafficking Statement. Pressure is maintained under 90 PSI to calculate CFM values. SCFM = Gas flow (standard cubic feet/minute). The standard temperature for calculating SCFM flow rate ranges from 60F to 68F, at a pressure of 14.7 psi and relative humidity of 36%. How To Drill Straight Holes Without a Drill Press? Thats why we have come up with SCFM a standardized measure of airflow, expressed in CFM. There is no standard condition at which the CFM values should be calculated. In remediation air and gas flow applications, the density changes with the pressure and temperature so is accounted for in the following calculations. Using this SCFM to CFM formula, we can devise a calculator that converts SCFM to CFM automatically. P = Gas pressure (psia) SCFM Conversion Calculator - SMC Pneumatics SCFM stands for Standard Cubic Feet per Minute. In the US, it is very common to see the volumetric air flow rate stated in units of Cubic Feet per Minute. Calculate the flow in cubic feet per minute. "@type" : "ContactPoint", Unlike CFMs, SCFMs consist of some variables. ACFM = Gas flow (actual cubic feet/minute) { However, its usually calculated with less than 90 psi. Since the air density at standard conditions are the same, the SCFM becomes a mass flow rate measurement, which makes it easy to compare conditions. Convert Amps To Watts (A to W): Simplest Calculator + Conversion Chart, What Size Heat Pump Do I Need? But after I felt my air compressor wasnt performing as it should, I started inspecting its ability. "name" : "Tutco-Farnam Custom Products", If the kick-in PSIG is 60 and the kick-out PSIG is 80, the result would be 20 PSIG. The equation Q/t = (m/t)*cp*T can be approximated for air to: Power [Watts] = (1/3)*73 SCFM* (200F - 90F) = 2676W. Home - Air Tools - SCFM vs CFM Learn the Difference In 5 Minutes. You can google "convert Scfm to cfm" and you will get several sites. Example: A typical 1-ton air conditioner will generate 400 CFM of airflow. gtag('config', 'G-EZTDCKHRQK'); CFM stands for Cubic Feet per Minute. To measure CFM, the pressure is taken to under 90psi. Forgot Password? Although the standard values can differ from place to place, it is still preferable to use the SCFM measurement unit than the CFM. *There are many parameters to consider when determining V-Factor. Concept of Air Velocity can be used in air conditioning, heating and ventilating work. "@context" : "http://schema.org", Heating elements explained with examples, case histories, white papers, and tips on how to choose a heater solution. // set client id custom dimension to client id Where: T = Gas temperature (F) P = Gas pressure (psia) ACFM = Gas flow (actual cubic feet/minute) 2023 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Were surrounded by hundreds of heating, ventilation, and air conditioning devices in this modern technology-centric life. This is useful for calculation purposes or for the application of flow measuring instruments. Online standard cubic feet / minute to standard cubic feet/hour units conversion calculator. Most of these devices come with a specification list of these units. Click here for more information. Air Flow Conversion Calculator - engineering.com How to use: Input the site's ambient conditions - atmospheric pressure, temperature, and relative humidity. sales@coastpneumatics.com, Enter actual inlet temperature entering the blower in degrees Fahrenheit, Enter actual inlet pressure in PSIA, include any inlet losses you anticipate, Enter site Barometric pressure in PSIA, this will be dependent on elevation, Enter Relative Humidity as a percent, ie. CFM = SCFM (Standard Pressure Actual Pressure) (Actual Temperature + 459.67) (Standard Temperature + 459.67) Let's just put the values in the following formula. For the sake of this discussion, we are going to assume standard conditions of 1 atm and 68F. There is no warranty, expressed nor Using this calculator, you can pretty much convert any SCFM to CFM at any condition. Phone: 800-536-9933 Heat Pump Size Calculator, How Many Outlets On A 20-Amp Circuit? Gainesville, GA 30504 You just plug in SCFM, P and T. Heres what you get in our example: CFM = 400 CFM ((15.3 psi 14.7 psi)((68F+459.67) (65F+ 459.67))) = 382 CFM. For example, if youve got an air tool that represents 3 CFM, it means the tool can produce 3ft3 volumetric airflow. ", Enclosures Please indicate below if you give permission to receive communications from TUTCO. The most common used in the United States is with the "sea-level" properties: Europeans normally use one ata and 0 oC as SCFM. In more technical terms, what is the mass flow rate? However, due to differing air densities, the actual mass flowing through can be different. Some of our calculators and applications let you save application data to your local computer. Sign In or Continue as Guest Please log in to your account. "logo": "https://farnam-custom.com/_assets/images/logo.png" We also know that moist air sinks (due to higher density). ], The standard humidity level to calculate SCFM is 36%. Most of the air-driven tools manufactured in the United States have an ASME (American Society of Mechanical Engineers), which is considered the standard specification of the following metric. implied on its accuracy. You just use the slider, set the '500 SCFM', '60F' and '16 psi' and you get the result: 500 SCFM is equal to 452.41 CFM at those conditions. Find Actual Cubic Feet per Minute based on data from your Standard Cubic Feet per Minute Technical Documents Submit calculator form data to Falmouth Products for review. Since CFM is based on real-world conditions, the humidity level considered to calculate the unit is inconsistent. At the same time, SCFM standardizes these factors to provide a more consistent measurement across different conditions and systems. SCFM Conversion Calculator - SMC Pneumatics 800.660.0733 Purchase Online with Net 30 Terms in 60 minutes To all of our customers and vendors, thank you and stay well. SCFM is an abbreviation of Standard Cubic Feet per Minute. This might look like a daunting equation, but its quite easy to use. (function(h,o,t,j,a,r){h.hj=h.hj||function(){(h.hj.q=h.hj.q||[]).push(arguments)}; SCFM vs CFM is just a means to quantify exactly what amount of air is moving (not just what volume of air but the exact mass of air). air), Sensible Heat (BTU/hr) = 1.1 x CFM x t (std. SCFM always has a standard pressure level of 14.7 psi. To calculate CFM values, the pressure is maintained under 90psi. Hopefully, now the SCFM vs CFM relation is better understood. })(window,document,'script','dataLayer','GTM-TVK9JWC'); The majority of TutcoFarnam Custom Products heaters are used to heat an air flow. Converting CFM to SCFM Converting the flow rate from CFM (compressed air) to SCFM (free air) can be calculated as follows: P = Pressure (PSIG) SCFM = CFM x (P + 14.7) / 14.7. In all those cases, we dont talk about pressures and temperatures; we only talk about the volumetric amount of air. Generally, the temperature range can be anywhere from 60-degree Fahrenheit to 68-degree Fahrenheit. To better understand the difference between SCFM and ACFM, consider these situations: There is a balloon filled with 1 cubic foot of gas at ambient, or standard conditions. Nl x 1.01325bar/6bar x (273.15 + 25 K)/273.15 K. { Care should be taken, as standard conditions vary between definitions. In this post, Ill share all about these metrics in the simplest way. Here it is: To calculate CFM from SCFM, you need to know what is the pressure (in psi) and temperature (in F) youre calculating the CFM at. "@type" : "ContactPoint", We don't collect information from our users. All of this might sound a bit complex. It can be 350 SCFM, 390 SCFM, 450 SCFM airflow. you can stop receiving communications at any time clicking unsubscribe in any email. CFM stands for Cubic Feet per Minute. Check More, SCFM vs CFM Learn the Difference In 5 Minutes, CFM vs SCFM Main Differences with Comparison Table. Although more than one standard is in use in the world, the American Society of Mechanical Engineers uses the following standard values: When the capacity of a heating or cooling unit is expressed in SCFM, these are the conditions the value assumes. How Do Your Calculate CFM on Air Compressor? Standard Cubic Feet per Minute = SCFM = ft. 3 /minute at standard conditions (1 atm = 14.7psi, 68F ) Why do that? air), Latent Heat (BTU/hr) = 0.69 x CFM x gr. However, real life actual conditions are seldom standard conditions, so corrections must be made to assure that the blower or compressor will provide the proper amount of air for the process to function properly. The ideal gas law, pV = nRT, gives us the relationship between pressure, volume and temperature of an ideal gas, where n is the number of moles of the gas and R is a constant. Plug in your barometric pressure, inlet pressure at blower flange, inlet temperature and relative humidity to get your ACFM value . Since the air density of an air flow stated at standard conditions (SCFM) is always the same, it is essentially a mass flow rate! (+ How Many Watts), Ceiling Fan Wattage, Power Calculator (+Running Costs Chart), 100 Amp Wire Size: Which AWG Wire For 100 Amps? PRM is an Original Equipment Manufacturer (OEM) of Pollution Control and other equipment, mainly focused on the Remediation and Landfill Industries. What is the other name of Newton's first law of motion? The SCFM - Standard Cubic Feet per Minute - determines the weight of air to fixed or "Standard" conditions. Besides, there is a 0.075 lbs./ft3 of air density in this consideration. After you get the PSIG of your air compressor, you need to calculate the additional air pressure during the refilling process. Online standard cubic feet / hour to standard cubic feet/minute units conversion calculator. Contact Us! C - 32F - for countries using SI metric system of units MSm^3/d - Mega Standard Cubic Metres per day defined at 15 deg. CFM describes the volume of air that occurs at an exact pressure or temperature. ACFM=SCFM* (460+Temperature (F))/530* 14.7/ (14.7+psig) If you read the gas flow at 100 SCFM at a temperature of 90 degrees F and a pressure of 40 psi, your ACFM flow is: 100* (460+90)/530* 14.7/ (14.7+40)=27.9 ACFM The difference between ACFM and SCFM for this scenario is significant, so be thoughtful when checking your rotameter. 1 cu ft = 28.316 8466 L. However, your "normal" liters need to be converted to actual liters at flow conditions. Cubic Feet Per Minute to Cubic Feet Per Hour | Kyle's Converter "https://www.linkedin.com/company/tutco-farnam-custom-products", +MORE.BULK ORDER PAGE Blower performance calculations are based on actual (not standard) conditions existing at the inlet and outlet connections of the blower. Contact our team of Technical Sales Engineers to get started. Assuming the following values of each required variable of your tool. As an Amazon Associate we earn from qualifying purchases. With these insights, you can find out whether the manufacturer lies to you about the tools capability or not. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! process, review, and transfer data in relation to sales and marketing communications, technical support Back to the reading on your rotameter. "image" : "https://farnam-custom.com/media/content_images/cfmvsscfm.JPG", The actual air volume flow is often termed ACFM - Actual Cubic Feet per Minute. How much SCFM do I need to run air tools? Purpose: To convert actual cubic feet per minute (acfm) to standard cubic feet per minute (scfm) and vice versa. Most rotameters read in SCFM when you may be expecting ACFM flow. h._hjSettings={hjid:3328263,hjsv:6}; It only tells us about 1 variable and that is the volume of air (V). Note: Its a bit difficult to explain the differences between SCFM and CFM without going too much into physics and Ideal Gas Law. 80% Relative Humidity is entered as 0.80. Once you do, you can just plug them into this SCFM to CFM converter and get the resulting CFMs: Here is an example of how this calculator works: Lets say we want to convert 500 SCFM to CFM at 60F temperature and 16 psi pressure. Buckle up. Whether you need help solving quadratic equations, inspiration for the upcoming science fair or the latest update on a major storm, Sciencing is here to help. Still, it considers varying temperature, pressure, and humidity levels, standardizing these factors to provide a more accurate comparison between different systems. ", SCFM = CFM * (Pactual/14.7psi)*(528R/Tactual). // ga set client id custom dimension To get started with the CFM calculation, first, you need to measure the tank in gallons per cubic foot. SCFM Conversion - Coast Pneumatics Assuming your room temperature is 25 C (77 F), take. CFM is the simplest way to describe the volume of air that is moving. The following formula can be used to convert the actual flow rate to standard flow rate, in cubic feet per minute. Packages Convert cfm to cubic metre/hour - Conversion of Measurement Units For example, if the PSIG is 20. Save my name, email, and website in this browser for the next time I comment. The full form of CFM is Cubic Feet per Minute. The True Gas Law, or the Non-Ideal Gas Law, becomes: Air volume conversion factors related to air with temperature 70F (21.1C): Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse! Assuming a cubic international foot. has no further obligation to provide maintenance, support, updates, enhancements or modifications. Using this relationship and referring to the ideal gas law, we get the following expressions: In the absolute scales required by the ideal gas law, standard atmospheric pressure is 14.7 psi and standard temperature is 528 degrees Rankine, which equals 68 degrees Fahrenheit. Click here to use our SCFM Conversion Calculator, pdblowers, Inc. We don't save this data. Which of the following metals remain in liquid for under normal conditions? Ive put so much effort writing this blog post to provide value to you. I also consent to the transfer of personal data He holds a BSc in Natural Sciences and Post Graduate Diploma in Environmental Science. The difference between SCFM and CFM is that SCFM is more indicative of how the air which is pressurized to a standard value will perform when delivered to the air tool from the compressor. Click the heart in the bottom right corner to save to your own articles box! Blowers To measure CFM, the pressure is taken to under 90psi. As a rule of thumb, an SCFM result will be lower than an ACFM result during a vacuum application, and a SCFM result will be higher than an ACFM result during a pressure application. SEER = (1 EER100% + 42 EER75% + 45 EER50% + 12 EER25%)/100, Total Heat (BTU/hr.) CFM is a smaller number than SCFM as it is calculated at higher pressure which makes the air volume small. There is a standard volume, pressure, temperature at which the SCFM values must be calculated. This interactive calculator helps explain the relationships between airflow, temperature and power. SCFM (Standard Cubic Feet per Minute) is also a unit of measurement for airflow.