Cfm to fpm calculator

To calculate the air change in a room, the airflow is measured (CFM) and multiplied by 60 minutes per hour. It is then divided by the volume of the room you wish to measure (in cubic feet): Air Changes / hr = (CFM x 60 minutes) / Volume of the room (cubic feet) In simpler words, we change the CFM or Cubic Feet per Minute into CFH or Cubic …

Cfm to fpm calculator. Formula: Diameter = √ ( (576 × A) / (3.14 × V)) Where, A = Air Flow. V = Air Flow Velocity. Online duct size cfm calculation. Use this simple science duct size cfm calculator to calculate diameter.

Sep 21, 2023 · To calculate the CFM of your air compressor, you should first determine the tank size and pressure rating of the compressor. Then, you need to measure the PSI, or pounds per square inch, and determine the correct conversion factor to convert PSI to CFM. Once this is done, multiply the tank size, pressure rating, and conversion factor to get the ...

Using our formula: CFM = 300 FPM * 2 square feet = 600 CFM. This calculation reveals that 600 cubic feet of air pass through the duct every minute, …To calculate the CFM of your air compressor, you should first determine the tank size and pressure rating of the compressor. Then, you need to measure the PSI, or pounds per square inch, and determine the correct conversion factor to convert PSI to CFM. Once this is done, multiply the tank size, pressure rating, and conversion factor to get the ...You can use the formula: FPM = (150 CFM) / (5 sq ft) = 30 FPM. So the air flow velocity in this duct is 30 FPM. My Calculator World helps you convert and solve math problems.To calculate the CFM of your air compressor, you should first determine the tank size and pressure rating of the compressor. Then, you need to measure the PSI, or pounds per square inch, and determine the correct conversion factor to convert PSI to CFM. Once this is done, multiply the tank size, pressure rating, and conversion factor to get the ...CFM to L/s Calculator. Conversion from Cubic Feet Per Minute to Liters Per Second can be just multiplying the CFM value with the 0.47194745. Here is the online CFM to L/s calculator to do cubic feet per minute to liters per second conversion in a quick time.Adicot, Inc.'s calculatorsare intended for professionals. The engineer(s) designing these calculators use their best efforts to provide accurate results. Adicot, Inc. makes no warranty of any kind, expressed or implied, concerning the information contained on this website. The information presented on this website shall be used by professionals ...Contact us at (847) 773-0645 and our specialists will answer all your questions about how to calculate air velocity in duct systems for a perfectly operating heating and cooling unit. Try out our online airflow rate calculator that allows you to calculate the airflow velocity and airflow rate in a pipe or duct, as well as learn the formulas.cfm to fpm conversion calculator. plane crash august 1966 passenger list. cambridge associates internship; genae angelique crump age; munchee company introduction; can you use loblaws gift card at no frills; which word implies a …

The FPM to CFM Calculator is a valuable tool for professionals and enthusiasts working with airflow and ventilation systems. By converting FPM to CFM, you can better understand and manage air movement, ensuring optimal conditions for various applications. Duct CFM @ .08 supply .05 return · Total Heat ... FPM to keep noise levels down and provide minimal resistance. This calculator can also be used to calculate ...gpm = gallons per minute, gpd = gallons per day, cfm = cubic feet per minute; Example - Convert from m 3 /h to Imperial gallons per minute (gpm) Volume flow in m 3 /h must be multiplied with. 3.67. to convert to Imp gpm. Alternatively use the online fluid flow calculator above. Related Mobile Apps from The EngineeringToolBox. Flow Converter AppFormula of CFM PSI Calculator. The formula used by the CFM PSI Calculator is as follows: CFM = (RPM * displacement) / (2.036 * PSI) Where: CFM is the Cubic Feet per Minute, representing the volume of air flow. RPM is the Rotations Per Minute of the compressor, indicating the speed at which the compressor operates.You can view more details on each measurement unit: cfm or cubic metre/hour The SI derived unit for volume flow rate is the cubic meter/second. 1 cubic meter/second is equal to 2118.8799727597 cfm, or 3600 cubic metre/hour. Note that rounding errors may occur, so always check the results.

CFM To FPM Round Ducts Calculator + Formula + Conversion Chart (1st part). This 1st calculator automatically converts CFM to FPM for round ducts (you insert FPM, and the diameter of the duct, and you get CFMs).Adicot, Inc.'s Duct Size Calculator is a versatile and powerful tool designed to assist professionals in the HVAC (Heating, Ventilation, and Air Conditioning) industry. Whether you work with metric or English units, this calculator can handle both, providing convenience and flexibility for users worldwide. Modeled after the renowned original ...Duct Size for 2000-4500 CFM. Airflow rates up to 2400 CFM are still common in residential applications. The below ducts are sized based on the friction loss chart provided in the ACCA Manual D with a friction loss of not more than 0.1 in.WG and a velocity not exceeding 900 FPM (guided for supply air ducts): Airflow.The equation would be: 2,400 / 12 = 200 CFM. All the calculators you find online, including ours, “do the math” for you by converting how many ACH you desire into how many minutes per change. 15 ACH = 4 minutes each. 10 ACH = 6 minutes each. 8 ACH = 7.5 minutes each, etc.

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To calculate the air change in a room, the airflow is measured (CFM) and multiplied by 60 minutes per hour. It is then divided by the volume of the room you wish to measure (in cubic feet): Air Changes / hr = (CFM x 60 minutes) / Volume of the room (cubic feet) In simpler words, we change the CFM or Cubic Feet per Minute into CFH or Cubic Feet ...The ACFM calculation formula is derived as follows: See also Bushing Press Fit Calculator Online. ACFM = (SCFM * (460 + gas temperature in Rankine)) / (530.67 * (gas pressure in psia)) In this formula: ACFM represents the Actual Cubic Feet per Minute, denoting the true flow rate of gas. SCFM refers to the Standard Cubic Feet per Minute, …Aug 21, 2017 ... In this series of Tech Tips videos, we will show you how to use airflow measurements to calculate the CFM. Learn more about Carrier at ...1 Cubic foot per minute (cfm) is equal to 0.028316846999 cubic meter per minute (m3/min). To convert cubic feet per minute to cubic meters per minute, multiply the cubic feet per minute value by 0.028316846999 or divide by 35.3146662313. As an example, let's convert 100 cubic feet per minute (cfm) to cubic meters per minute (m3/min). Contact us at (847) 773-0645 and our specialists will answer all your questions about how to calculate air velocity in duct systems for a perfectly operating heating and cooling unit. Try out our online airflow rate calculator that allows you to calculate the airflow velocity and airflow rate in a pipe or duct, as well as learn the formulas.

Six Sigma Calculations - Six Sigma calculations are based on defects and arranged in a scale from one to six, six meaning 99.9997% defect-free. See more Six Sigma calculations. Adv...Quick Reference ; 10 MPM. 32.81 FPM ; 20 MPM. 65.62 FPM ; 30 MPM. 98.43 FPM ; 40 MPM. 131.23 FPM.Eq. 1. V = C [ ( 2 · pw · gc / ρ ) ]0.5. where. V = velocity of the fluid (ft / sec) pw = velocity pressure (pitot-tube manometer reading) (inches of water) gc = gravitation constant (32.174 lbm-ft / lbm-sec 2) C = unit conversion factor = 136.8. ρ = density of air, lbm/ft 3. The type of manometer or differential pressure transducer used ...As an example, let's convert 100 cubic feet per minute (cfm) to cubic meters per minute (m3/min). To do this, divide 100 by the conversion factor of 35.3146662313. 100 cfm ÷ 35.3146662313 = 2.8317 m3/min. Therefore, 100 cfm is equivalent to approximately 2.8317 m3/min. cfm to m3/min conversion formula: m3/min = cfm * 0.028316846999Aug 28, 2018 ... Testo smart probes app to calculate ... calculators at https ... Measuring Velocity Pressure, FPM and CFM with a Testo 510i Manometer and a Pitot ...Upgrading your bathroom but don't know what vent fan you need? Use our online calculator to find out! Expert Advice On Improving Your Home Videos Latest View All Guides Latest View...The desired size of each louver blade (in inches). The total area of all louvers combined (in square inches). To calculate the Total Louver Area, you can use the formula: Total Louver Area = (Required CFM * 144) / Face Velocity (FPM) Here, 144 is a conversion factor to convert CFM to cubic inches per minute (1 cubic foot = 144 cubic inches). It can be expressed in units as ft 3 /min.The CFM can be calculated based on the FPM (Feet per minute) and the area of the air space. Formula : Cubic Feet Per Minute (CFM) = Feet Per Minute x Area of Air Space. Step 1: Consider the area of an air space as 100 square feet and the feet per minute (FPM) as 50. Area = 100 sq.ft. Step Four: Calculate the CFM Needed. To calculate the CFM needed to ventilate a space with a single air change per hour, you can use the following formula: CFM = cubic feet ÷ 60. So, the cubic feet per minute of airflow needed to ventilate a space with a single air change per hour is equal to the volume of the space in cubic feet divided by 60. To calculate CFM, you need to know the size of your heating or cooling unit in tons. Multiply this number by 400, which is the average output of an HVAC unit. Multiply this number by 400, which is the average output of an HVAC unit.

Measure the volume of your space (including L’ x W’ x H’) Multiply the space volume with the required air changes. Divide it by 60 minutes. Here’s an example: Suppose: space volume = 18x24x10, ACH = 10. Put the values in the cubic feet per minute equation: CFM = Space volume x ACH / 60 minutes. CFM = 18x24x10 x 10 / 60 = 720.

Example. Suppose a duct with an area of 5 square feet and the air is moving at a velocity of 200 feet per minute (FPM), you can find the Cubic Feet per Minute (CFM) using this formula: CFM = (Area in square feet) x (FPM) Substituting the values: CFM = 5 sq ft x 200 FPM = 1000 CFM. So, the airflow rate in this duct is 1000 CFM.Aug 21, 2017 ... In this series of Tech Tips videos, we will show you how to use airflow measurements to calculate the CFM. Learn more about Carrier at ...CFM, or Cubic Feet per Minute, is the measurement of airflow volume. It’s the quantity of air a fan or system can move in a minute. It’s the quantity of air a fan or system can move in a minute. Knowing how to calculate CFM is pivotal for optimizing performance and efficiency.Your net worth is about more than just money in your bank account, but calculating it is as easy as one, two, three — almost. Daye Deura Net worth can be a confusing concept to wra...This flow rate calculator uses flow velocity and cross-sectional flow area data to determine the volumetric flow rate of liquid. You can calculate the flow rate in five simple steps: Select the shape of the cross-section of the channel. Input all the measurements required to compute the cross-sectional area. Input the average velocity of the flow.May 9, 2023 ... Vacuum & Flow Unit Calculator. Home/Vacuum & Flow ... Vacuum Unit Conversion Calculator. mbar, torr ... CFM. l/sec. LPM. m3/hr. *Gauge, or relative ...If you’re unemployed, you may be eligible for benefits. **Unemployment benefits come under the jurisdiction of individual states.** Each state has its own set of regulations for ca...

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The higher the number, the more air is being forced through the system. The volumetric flow rate of a liquid or gas in cubic feet per minute. 1 CFM equals approximately 0.47 liter per second. Definition: Cubic foot/minute. Cubic feet per minute (CFM) is a measure used in Industrial hygiene and ventilation engineering. Equation for calculate cfm to fpm is, CFM = FPM x A. Equation for calculate CFM to FPM. Formula for cfm to fpm calculation. Below the calculator, we will demonstrate how the cubic feet per minute calculator works by solving one example using the calculator and CFM formula. You will also find a CFM chart, with airflow in CFM calculated for areas between 100 sq ft and 3,000 sq ft (useful for ductwork as well) further on. CFM Airflow CalculatorSix Sigma Calculations - Six Sigma calculations are based on defects and arranged in a scale from one to six, six meaning 99.9997% defect-free. See more Six Sigma calculations. Adv...CFM = (Room Volume in cubic ft) x ACH / 60. Calculate Room Volume: To find the volume of the room, multiply the room’s length (ft), width (ft), and height (ft). This will give you the volume in cubic feet. Determine Air Changes per Hour (ACH): This value varies based on the room type and its occupancy. Residential spaces usually need between ...The goal is to subtract the starting time from the ending time under the correct conditions. If the times are not already in 24-hour time, convert them to 24-hour time. AM hours are the same in both 12-hour and 24-hour time. For PM hours, add 12 to the number to convert it to 24-hour time. For example, 1:00 PM would be 13:00 in 24-hour time.Free online ductulator for sizing of HVAC ducts. Round duct: "Ø 573 FPM 0.073 inWg/100ft Rectangular duct: "x " 4500 FPM 0.047 inWg/100ftNow, multiply 3 x 400 CFM to get 1200. You would need a blower that can move 1200 CFM. Pro Tip: Round up – If you’re more than halfway to the next larger size, round up to it. In our example, if you needed 33,500 BTU, or 2.75 tons, round up to 3 tons and multiply by 400 CFM per ton for the same result – 1,200 CFM. Free online flow converter - converts between 58 units of flow, including cubic meter/second [m^3/s], cubic meter/day [m^3/d], cubic meter/hour [m^3/h], cubic meter/minute, etc. Also, explore many other unit converters or learn more about flow unit conversions. Input: Area: 500 Square Feet. Velocity: 200 fpm. Calculation: In this example, we need to calculate the air flow rate based on the given input values. Air Flow Rate = 500 Square * 200 fpm = 100,000 CFM. In this example, with an area of 500 ft² and an air velocity of 200 fpm, the air flow rate would be 100,000 CFM.A capital loss is a decrease in the value of an investment. The formula for capital loss is: Purchase Price - Sale Price = Capital Loss A capital loss is a decrease in the value of... 3. Learn basic fan calculation formulas. This practical math formula goes a long way when you're considering air ventilation improvement in an indoor space: CFM = (fpm * area) CFM (Cubic Feet per Minute) is calculated by multiplying the velocity (Feet per Minute) with the area (Square Feet). Question: I have a warehouse that I want to exhaust ... ….

RPM= (FPM / π) / (Diameter * 12) Where, FPM = Feet Per Minute, D = Diameter. π = 3.1428571. Online rpm to fpm converter calculator. Use this simple drilling rpm to fpm converter calculator to convert Feet Per Minute to Revolution Per Minute.Input CFM: Enter the CFM value, which represents the volume of air moved by the fan or blower. Fan Efficiency: Insert the fan efficiency, expressed as a decimal (e.g., 0.85 for 85% efficiency). Fan Area: Provide the fan area, usually in square feet. Calculate: Click the “Calculate” button to obtain the static pressure in inches of water ...Cubic feet per minute (CFM) is a unit to measure the velocity of the flow of air. It can be expressed as ft 3 /min. Enter the FPM value and the area in measurements of your choice such as mm 2, acre, m 2 and so on, in this Feet per minute to cubic feet per minute calculator to convert FPM to CFM (ft/min to ft3/min).RPM= (FPM / π) / (Diameter * 12) Where, FPM = Feet Per Minute, D = Diameter. π = 3.1428571. Online rpm to fpm converter calculator. Use this simple drilling rpm to fpm converter calculator to convert Feet Per Minute to Revolution Per Minute.To calculate a fan's airflow capacity in cubic feet per minute (cfm), multiply the average airspeed in feet per minute (fpm) by the square footage of the fan face. (The area of a circle is equal to bd^2/4, where d is the diameter in feet.) 2.On the other hand, cubic feet per minute (CFM) means the volume of air that flows through a given point in the same amount of time. The conversion involves multiplying the linear velocity (FPM) by the cross-sectional area through which the air flows. Formula: CFM=FPM∗A, where: CFM - cubic feet per minute (ft³/min), FPM - feet per minute (ft ...Airflow (CFM) = Room’s floor area × Ceiling height (ft) × ACH / 60 where: Room’s Floor Area: The room’s floor area in square footage. Ceiling Height: The height from floor to …Plumbing & HVAC. CFM Calculator – Calculate Required Airflow. Calculate how much airflow you need for a room or building using our CFM calculator below. Room Length & …Quick conversion chart of cfm to gallons per minute. 1 cfm to gallons per minute = 6.22884 gallons per minute. 5 cfm to gallons per minute = 31.14418 gallons per minute. 10 cfm to gallons per minute = 62.28836 gallons per minute. 15 cfm to gallons per minute = 93.43253 gallons per minute. 20 cfm to gallons per minute = 124.57671 gallons per minuteMay 18, 2006 ... It can read wind speed in knots which is equal to FPM x 100. How do I convert knots to CFM? I know that the TurboMeter is what high velocity ... Cfm to fpm calculator, By using this equation, we can determine the size of the return grille we need for 400 CFM airflow like this: Grille Area (400 CFM) = 400 CFM ÷ 500 FPM ÷ 0.7 × 144 = 164 Sq In. That means we will need a grill with at least 164 square inches of area to accommodate for a 400 CFM airflow. 10×10 grille, for example, has a 100 sq in area; it ..., Below you will also find an SCFM to CFM calculator that automatically converts SCFM to CFM. Here is the complete SCFM to CFM formula we derive further on: CFM = SCFM × (14.7 psi÷ Pactual ) × (Tactual + 459.67) ÷ (68°F + 459.67) From experience, we all know that warmer air rises (due to lower density)., Converting Feet Per Minute (FPM) to Revolutions Per Minute (RPM) involves rearranging the RPM to FPM conversion formula. Here’s the formula: RPM =FPM / ( π ×Diameter) Where: RPM represents the speed of rotation in revolutions per minute. FPM denotes the linear speed in feet per minute. π (pi) is a mathematical constant, …, Volume flow is usually measured in cubic feet per minute (CFM). Velocity or volume measurements can often be used with engineering handbook or design ..., To convert cubic feet per minute to liters per second, multiply the cubic feet per minute value by 0.47194745 or divide by 2.1188799728. As an example, let's convert 500 cubic feet per minute (cfm) to liters per second (L/s). To do this, divide 500 by the conversion factor of 2.1188799728. Therefore, 500 cfm is equivalent to approximately 235. ..., Cubic feet per minute (CFM) is a unit to measure the velocity of the flow of air. It can be expressed as ft 3 /min. Enter the FPM value and the area in measurements of your …, Quick conversion chart of cfm to gallons per minute. 1 cfm to gallons per minute = 6.22884 gallons per minute. 5 cfm to gallons per minute = 31.14418 gallons per minute. 10 cfm to gallons per minute = 62.28836 gallons per minute. 15 cfm to gallons per minute = 93.43253 gallons per minute. 20 cfm to gallons per minute = 124.57671 gallons per minute, In this video, we talk about 2 different kinds of anemometers, how to use them, and how to convert Feet per Minute into CFM.#hvac #hvactech #hvactechnician #..., Duct CFM @ .08 supply .05 return · Total Heat ... FPM to keep noise levels down and provide minimal resistance. This calculator can also be used to calculate ..., This 1st calculator automatically converts CFM to FPM for round ducts (you insert FPM, and the diameter of the duct, and you get CFMs). We will explain how to use the formula to calculate this as well. , 3. Learn basic fan calculation formulas. This practical math formula goes a long way when you're considering air ventilation improvement in an indoor space: CFM = (fpm * area) CFM (Cubic Feet per Minute) is calculated by multiplying the velocity (Feet per Minute) with the area (Square Feet). Question: I have a warehouse that I want to exhaust ..., May 9, 2023 ... Vacuum & Flow Unit Calculator. Home/Vacuum & Flow ... Vacuum Unit Conversion Calculator. mbar, torr ... CFM. l/sec. LPM. m3/hr. *Gauge, or relative ..., Oct 7, 2023 · Multiply the flow rate in the original unit by the conversion factor to get the equivalent flow rate in the desired unit. For example, if you have a flow rate of 100 CFM and want to convert it to Cubic Meter/Hour (m³/hr), you would use the conversion factor of 0.5886: 100 CFM * 0.5886 = 58.86 m³/hr. So, 100 CFM is equivalent to 58.86 m³/hr. , Duct Size for 2000-4500 CFM. Airflow rates up to 2400 CFM are still common in residential applications. The below ducts are sized based on the friction loss chart provided in the ACCA Manual D with a friction loss of not more than 0.1 in.WG and a velocity not exceeding 900 FPM (guided for supply air ducts): Airflow., The Toro PowerJet F700 Electric Leaf Blower has the highest CFM rating of any corded blower. Expert Advice On Improving Your Home Videos Latest View All Guides Latest View All Radi..., Calculate Air Flow Volume (CFM) Now that we’ve calculated Flow Velocity ( 2686 FPM) and Duct Cross Sectional Area (1.07 square feet) we can calculate Air Flow in CFM for our 14" diameter round duct using the equation: CFM = FPM x Duct Cross Sectional Area. CFM = 2,686 x 1.07 sq. feet., Input: Area: 500 Square Feet. Velocity: 200 fpm. Calculation: In this example, we need to calculate the air flow rate based on the given input values. Air Flow Rate = 500 Square * 200 fpm = 100,000 CFM. In this example, with an area of 500 ft² and an air velocity of 200 fpm, the air flow rate would be 100,000 CFM., cfm to fpm conversion calculator. plane crash august 1966 passenger list. cambridge associates internship; genae angelique crump age; munchee company introduction; can you use loblaws gift card at no frills; which word implies a …, CFM = 450 ft/min x the area, which is 36” x 24”. We’ll need to convert our duct dimensions in inches, into square feet, because we are looking to arrive at cubic feet per minute. 36” x 24” = 864 in2. 864 in2 / (144 in2/ft2) gives us 6 ft2. CFM = Velocity x Area. Now we can enter the total square feet into our formula., The flow rate of air can be calculated using the formula: Flow Rate (in cubic feet per minute, CFM) = Velocity (in feet per minute, FPM) x Cross-sectional Area (in square feet, sq ft) How do you convert air flow to CFM? To convert air flow to CFM, you need to know the velocity and cross-sectional area of the air. The formula is the same as above:, It can be expressed in units as ft 3 /min.The CFM can be calculated based on the FPM (Feet per minute) and the area of the air space. Formula : Cubic Feet Per Minute (CFM) = Feet Per Minute x Area of Air Space. Step 1: Consider the area of an air space as 100 square feet and the feet per minute (FPM) as 50. Area = 100 sq.ft., Calculation: 250 CFM is 250 cubic feet per minute. In one hour (60 minutes), we get 60*250 = 15,000 cubic feet per hour. The whole volume of the room is 200 sq ft * 8 ft = 1,600 cubic feet. Such an air purifier is capable of changing the whole volumetric air in room 15,000/1.600 = 9.375 times. Answer: ACH = 9.375. , Alright, let’s presume that you have 2,000 square feet home and want to figure out how many CFM you need for that. Here, we can use the 0.67 CFM per square foot average and calculate the CFMs for a 2,000 sq ft house like this: 2,000 Sq Ft House CFMs = 2,000 Sq Ft × 0.67 CFM/Sq Ft = 1,333 CFM., The calculator employs critical parameters, including the room’s volume and the desired air changes per hour, to deduce the exact CFM required for the room. Formula with Variables Description. CFM = Room Volume×Air Changes per HourRoom Volume×Air Changes per Hour / 60. Where: Room Volume is the volume of the room in cubic feet., Unit Descriptions; 1 Cubic Foot per Hour: Volume flow rate of 1 cubic foot in a period of 3600 seconds. Assuming a cubic international foot. 1 Cubic foot per hour is approximately 0.000 007 865 790 72 cubic meters per second. 1 cu ft/h ≈ 0.00000786579072 m 3 /s., Alright, let’s presume that you have 2,000 square feet home and want to figure out how many CFM you need for that. Here, we can use the 0.67 CFM per square foot average and calculate the CFMs for a 2,000 sq ft house like this: 2,000 Sq Ft House CFMs = 2,000 Sq Ft × 0.67 CFM/Sq Ft = 1,333 CFM., This CFM calculator determines the appropriate airflow requirements for a given space, taking into account the room size and recommended air changes per hour (ACH). What Is CFM? CFM (Cubic Feet Per Minute) is the unit of measurement that is used to measure the volume of air passing through a given space in one minute., CFM = FPM × Area. Equation for calculate FPM to CFM. Formula for fpm to cfm calculation. , The Compressor CFM (Cubic Feet per Minute) Calculator is a powerful tool designed to provide users with accurate airflow measurements for their compressors. By inputting the volume of the air tank (in cubic inches) and the number of revolutions per minute (RPM) of the compressor's pump, users can quickly determine the CFM, essential information for optimizing compressor performance., May 18, 2006 ... It can read wind speed in knots which is equal to FPM x 100. How do I convert knots to CFM? I know that the TurboMeter is what high velocity ..., Volumetric Efficiency. Air Flow Rate ft 3 /min. Calculator. Formula. Code to add this calci to your website. Formula: CFM= (CID * RPM * VE) / 3456 Where, Air flow or cubic feet per …, Formula of CFM PSI Calculator. The formula used by the CFM PSI Calculator is as follows: CFM = (RPM * displacement) / (2.036 * PSI) Where: CFM is the Cubic Feet per Minute, representing the volume of air flow. RPM is the Rotations Per Minute of the compressor, indicating the speed at which the compressor operates., Air Flow Conversion Calculator. CUI Devices' air flow conversion calculator can be used to convert between common units for volume air flow and air velocity flowing past a point in a specified area of duct. To use the calculator, enter your air velocity or volume air flow and duct area/type, select your units, click calculate air flow, and your ...