# Kpa To Cfm Calculator

Trident Compressed Air Ltd. The calculation based on time required for the compressor to run uses the equation "t = V (p1 - p2) / C pa" (Time for receiver to go from upper pressure limits (min) = Volume of Receiver Tank (cuft) (Maximum Tank Pressure (psi) x minimum tank pressure (psi)) / Air Needed (cfm) x 14. 085 kPa) **Note: (The Total Vacuum Required for the desired flow rate of (74. The value will be converted to all other units of the actual measure. Free online pressure converter - converts between 53 units of pressure, including pascal [Pa], kilopascal [kPa], bar, psi [psi], etc. Current loop tester panel mounting. 89475729 kPa. Konversi Ukuran Satuan Massa Berat (Ton, Kwintal, kg. It is essential to know the standard reference conditions of temperature and pressure to define the gas volume since there are various debates about what normal and standard should be. 5 MPa (megapascal) in words is "zero point five MPa (megapascal)". 06308 liter/sec 1 fl. The finder will select the best match from our line of standard compressors, but we can also design a custom solution to meet any requirement. Here you can make instant conversion from this unit to all other compatible units. 4-20mA scaling calculator. NMPS – Normal Meter Per Second From the. 1 (statute) mile (mi. Get quick answers when you enter math equations or conversions in the Google Search box. The conversion from ACFM to ICFM can be expressed as. Catalytic Converters have been in use in Australia since the introduction of un-leaded petrol in 1986. Unit converter, Measurement conversion, Text tools and converters, Mathematical calculators, Date and time tools, sport calculators. This is the applied pressure measured by the pressure transducer that you wish to convert to a millivolt output reading. 1) California Title 24 (2013 edition, section 140. Pressure at Depth Calculation Examples: Example 1: A person is diving in a lake in the depth of h= 8 m and the water density of the lake is 998 kg/m3. Gallons per minute of cooling or heating water. You can select between horsepower (HP) or kilowatt (KW). Cubic Feet per Minute =. dB Converter. ICFM - Inlet Cubic Feet per Minute. ft per minute = 5000 x 231 = 334. Use our Vacuum Lifting Calculator below. The other way around, how many kilowatts - kW are in one atmosphere cubic foot per minute - atm cfm unit? Calculate from power into other power unit measures. Online calculator to quickly determine Air Flow Rate through an Orifice. WSU Prosser - IAREC , 24106 N Bunn Rd, Prosser WA 99350-8694, 509-786-2226,. C and leaving at 21 deg. What is coolconversion. 6 170 227 283 340 425 850 1133 10 20 30 40 50 60 70 80 90 100 0. The higher the CFM, the more powerful the suction is and the more expensive the vacuum will be. Evidently getting a good cross over is quite tricky. Calculation Method to convert SCFM (Standard Cubic Feet per Minute) to ACFM (Actual Cubic Feet per Minute). com has made it easier than ever to convert between hundreds of common and not-so-common oilfield measurements using our powerful yet simple-to-use online oil and gas conversion calculator. 249 kPa) to 150 psid (10. Small pressure differences, such as those experienced in experimental wind tunnels or venturi flowmeters, are measured by lighter fluids such as water (27. Flow Rate and Pressure Unit Converter. Contact us today to discuss your heat exchanger or blower aftercooler application with a design engineer, or use our interactive online form to get a fast and accurate quote!. 699 l/Sec cfm 2. To calculate the volume of a 1000 ft of pipe (in 42 galon barrels) you only have to square the ID (in inches) of the pipe. It stands for cubic feet (per) minute. 809 Mattress Factory Road P. Slpm [ Std pressure 1 bar (100 kPa), and Std temperature 20 deg C] Scfm [Std pressure atm (14. With excellent sensitivity and proven long term stability, the CXLdp delivers reliable measurements below 0. 895x10-3 N/mm 2 = 6. Enter any two parameters to get the third:. conversion data gases unites weight kilograms (kg) gas cubic meters (nm3) liquid liters (l) oxygen 1 kilogram 1. 472 m3/min 0. Equations displayed for easy reference. Time Master II - Time Calculator for Pilots, Accounting, Broadcasting Ultra Measure Master - Most Complete, Easy-to-Use Metric Conversion Calculator Measure Master Pro - Feet-Inch-Fraction Calculator for Do-It-Yourselfers. Loading Unsubscribe from Electrical videos? Cancel Unsubscribe. Engineering. = absolute pressure of the suction vessel, kPa P vpa = fluid vapor pressure at pumping temperature, kPa absolute H st = static head to suction reference line (usually center point of the impeller), m H fs = suction line losses, m ρ = fluid density, kg/m3 g = gravitational constant, 9. 7 psi) is the amount of pressure that can lift water approximately 10. also calculate GPM by fixture unit ? tank you. Orifice plate pressure drop calculator is used for flow rate measuring in pipe systems. Hundreds of schools and universities now use the content on our site as part of their computer curriculum. Cubic Feet Per Minute (CFM) =. Our diesel air compressor represents great value and reliability. Or, if a fire hydrant must operate at a static pressure of 40 psi, the water column equivalent to 40 psi can be computed. 020885434273039 psf. 069 Atmospheres 0. How to calculate flow rate based on pressure and pipe diameter? How can i calculate the flow rate in cubic meters if i only have the diameter of the pipe (2 inches) and the pressure 2 bar? 14 comments. While referring to gauge pressure, atmosphere is taken as datum - zero and pressure above. Hello everyone, I have a unique installation that I am hoping you may be able to help me with. 4 page 1 of 2 to convert from to. Did you find us useful? Please consider supporting the site with a small donation. For all pressure unit conversions, please check pressure converter. pdf) file to my memory card. My opinion of KPA Management and it's on-site manager in the Circle condo continues to get worse with time. The eureka is 1/3 the cost but is it a 1/3 the value of product. 0075006168270417 torr (Torr) use this converter torr to pascals (Torr to Pa. Easily convert liters per minute to US gallons per minute, convert l/min to US gpm. Pascals (pa) area messurement of pressure. 7 8" wg (2 kPa) N/A 10" wg (2. 667 m3/hour 60 m3/hour cfm 0. VICI ®, Valco ®, and. Take it off. If water has to be pumped through a 2-inch Schedule 40 polyvinyl chloride (PVC) plastic pipe from a well to a pond 400 feet away, calculate how many GPM the system is delivering. The result is about 3-4% higher than you get by actually calculating the volume (since I use this for calculating hydrotest volumes the extra works out well for trucks that may not be as full as advertised). 0 ˚F, T atm = 14. The eureka is 1/3 the cost but is it a 1/3 the value of product. 1 pound per cubic foot ( lb/ft3 ) = 6. However, there is a device called a manometer which is used to measure either pressure(in. density waves, but the fluctuations were still below or equal to 3. Note that rounding errors may occur, so always check the results. The finder will select the best match from our line of standard compressors, but we can also design a custom solution to meet any requirement. +44 (0)161 866 8860 [email protected] Also, read about calculation procedures, what you have to know for the calculations and what limitations apply. 03532 x LPM. Online Unit conversion for length, flow rate, pressure, temperature, speed, viscosity, volume, etc. Model L Series Two-Stage Converter for LP-Gas Engines. The information provided is designed to assist your product selection but should not be used exclusively in your purchase decision. What is the pressure of fluid at the end of the. 16 CFM) exceeds the (-7. You need to convert to standard CFM or to mass so you can calculate the appropriate fuel mass to inject. This calculator will help you estimate the potential of an engine. The calculation of two-phase quality at the entrance of the test section was performed using an energy balance on the electric heat tape section of the. Rated liquid characteristics. Converison of pressure or stress units Definition: pressure = force per area; p = F/A; F = force, A = area, p = pressure The SI unit of the pressure is the pascal with the formula sign Pa. 27302-0189 USA. Easily convert kilopascals to pounds per square inch, convert kPa to psi. 1 Calculate the approximate total force that will be exerted on a 4" diameter glass view port used in a vessel under high vacuum conditions. l/min Cfm m³/h 600 21 36 1200 43 72 1800 64 108 2400 85 144 3000 106 180 3600 128 216 4200 149 252 4800 170 288 5400 191 324 6000 213 360 6600 234 396 7200 255 432 7800 277 468 Conversion Tables Depression (mm Hg) Vacuum (%) Absolute Pressure (mbar) Depression (mbar) 0 0 1000 0-75 10 900 -100-100 13. 89475729 kPa. Many other converters available for free. This term is used to measure air flow rate. CFM (cubic feet per minute) is a rate of flow. Leaving water temperature. 145 bar kPa 100 Atmospheres. You can from the same file, to insert a new computation sheet or to duplicate the computation sheet in progress for the study of a similar ductwork and to make the complementary modifications thereafter. Enthalpy of air at leaving wet bulb. To use a CFM (cubic feet per minute) calculator to determine airflow needs for a room, know variables such as the volume of the room and the number of times the air changes per hour from the fan/ventilation system and apply them to a formula. meter kgf/m 2, kilopascal kPa, millibar, millimeter of mercury mmHg, pascal Pa, pounds per square foot psf, pounds per square inch psi, torr Torr. The question almost always refers to gases, and you have to know how abnormal your cubic meters are. Many Other Conversions. Get quick answers when you enter math equations or conversions in the Google Search box. Providing conversion between metric and imperial length, weight, area, capacity and tempertures. Then enter either Input (Red box) or Output (Blue Box) to be given the corresponding Output or Input Values. And British Imperial / Cubic Foot Per Hour [ft³/hour] Online converter page for a specific unit. 80 Facts and Figures Units, Conversion Tables, and Formulas Pressure FROM TO MULTiPLy By EXAMPLE atm (atmosphere) bar 1. convert any measure to any unit cfm, Cubic feet per minute cl, Centiliters cm, Centimeters cP, Centipoises cSt, Centistokes kPa, Kilopascals. Use this page to learn how to convert between kilopascals and pounds/square inch. It is calculated in either Cubic Feet per Minute (CFM) or Feet per Minute (FPM). /minute = 0. Time Master II - Time Calculator for Pilots, Accounting, Broadcasting Ultra Measure Master - Most Complete, Easy-to-Use Metric Conversion Calculator Measure Master Pro - Feet-Inch-Fraction Calculator for Do-It-Yourselfers. 1 pound per cubic foot ( lb/ft3 ) = 6. 145 to get 200 kPa. Silent-Aire; Runtal; Panasonic; Carrier; Rosemex; Twa Panel Systems; Verano. 001 kPa, or 0. hypothesis was that an Effective Reserve of 1130 L/min (40 CFM) basic reserve plus 15 L/min (0. The unit ppm is used in several branches in different ways. Whilst every effort has been made in building this cubic inches and cubic centimeters converter, we are not to be held liable for any special, incidental, indirect or consequential damages or monetary losses of any kind arising out of or in connection with the use of the converter tools and information derived from the web site. 16 CFM) exceeds the (-7. In the foot-pound-second (FPS) system, the units are pounds per square inch, or psi. If you need to convert cubic meters/minute to other units, please try our universal Flow Unit Converter. 001 kPa, or 0. 2 l/min Answer: there flows 67. The difference between what you see on the rotameter and what you may have expected to see may be SCFM vs. The higher the PSI pressure (Pounds per Square Inch) you plan to blast at, also increases your compressor requirements. One i found had an online calculator converting SCFM to ACFM (Actual Cubic Feet per Minute) but I am not sure if ACFM = cfm. edu is a platform for academics to share research papers. Share Inch of water (inH2O - Water), pressure. lower atmospheric pressure) operation at these higher altitudes has the effect of reducing the capacity and maximum vacuum levels attainable. Alternatively, you can also use this 'MMSCFD conversion calculator' to quickly convert a gas flowrate to MMSCFD unit. Millivolt Output Parameters Supply Voltage (V). For design calculations, assume the maximum length of air hose recommended by NIOSH/MSHA is used, with a pressure drop of 170 kPa gage (25 psig) for the hose and fittings. When air passes through the filter there will be a pressure drop. This is simple to use online converter of weights and measures. The calculator computes many humidity attributes using ambient temperature and pressure, and relative humidity (RH). com has made it easier than ever to convert between hundreds of common and not-so-common oilfield measurements using our powerful yet simple-to-use online oil and gas conversion calculator. You can calculate SCFM from actual cubic feet per minute (ACFM) if the air pressure, temperature and altitude are known. Try CEJN's converter web app, for convenient conversion between units: Converter app Click for CEJN Quick Connect Solutions; and to download 3D models and drawings. SI symbols of liter or litre is L or l. Cubic Feet Per Minute Conversion Charts. I want to know how can convert flow water chart to table data. This online liters per second (LPS) to cubic feet per minute converter helps you to calculate Cubic Feet Per Minute (CFM). 1 psi (lb/in 2) = 6,894. It is connected to another pipe of 1 m 2 of area, both at the same height. 0133 bars cfm cfh (ft 3 / hr) cfh GPH GPH GPM GPM. The working file can be made up of various computation sheets. Site Information Is Not Medical Advice. The first principle that must be understood is that all materials permit some leakage through them over a period of time. hypothesis was that an Effective Reserve of 1130 L/min (40 CFM) basic reserve plus 15 L/min (0. How to Calculate Flow Resistance for Gases The Lohm Laws extend the definition of Lohms for gas flow at any pressure and temperature, and with any gas. Inches Mercury Vacuum Absolute Pressure (P. O Webcalc disponibiliza Aplicativos online úteis em várias áreas de conhecimento, tais como Matemática, Engenharia, Física, Finanças. 667 m3/hour 60 m3/hour cfm 0. 54 CFM Cubic Meters Per Hour 0. Results are shown in different pressure units. The eureka is 1/3 the cost but is it a 1/3 the value of product. Parts Per Million (ppm) Converter for Gases. 47 (9) Optional set-mounted radiator cooling (with seismic feature codes L228-2 (IBC) and/or L225-2 (OSHPD)). Individual applications may have unforeseen factors and therefore Clearpond recommends clarifying any figures obtained from our calculators with your local retailer. It is my understanding that most systems use the Map sensor at small openings and then switch over to the TPS at larger openings (I may have that backwards). Because pressure is commonly measured by its ability to displace a column of liquid in a manometer, pressures are often expressed as a depth of a particular fluid (e. How many inches of water in a kilopascal: If p kPa = 1 then p inH2O = 4. Calculating CFM begins with looking at the specifications of the compressor to find the volume of the tank. 01463133 × 1 = 4. The calculation is based on standard conditions of 68°F, 36% relative humidity (RH) and 14. 4301 RN Zierikzee Groeneweegje 19 - 25 Nederland. Enter any two parameters to get the third:. The higher the PSI pressure (Pounds per Square Inch) you plan to blast at, also increases your compressor requirements. 145 to get 200 kPa. The only difference is the reference point. 278 m3/min 0. NOTE: Calculators may not be "mobile friendly. Calculator. cfm calculator | Compressed Air Systems. Once we have MAF integrated over time, we can calculate fuel flow using a specific air/fuel mixing ratio (A/F). 10 inches of water. The higher the CFM, the more powerful the suction is and the more expensive the vacuum will be. 8762 1 nm3 gas 1. I am trying to compare to a eureka that has 48 at the head and 83 "cfm" at the hose end. It is my understanding that most systems use the Map sensor at small openings and then switch over to the TPS at larger openings (I may have that backwards). This is our valve C v calculator. Easily convert kilopascals to pounds per square inch, convert kPa to psi. What is the pressure of fluid at the end of the. 145 to get 200 kPa. Flow Rate Calculator. For example, this calculator shows that a person 170 cm tall and weighing 70 kg will produce a power output of 39. To use a CFM (cubic feet per minute) calculator to determine airflow needs for a room, know variables such as the volume of the room and the number of times the air changes per hour from the fan/ventilation system and apply them to a formula. Note that rounding errors may occur, so always check the results. Most gasses act very closely to prediction. Our conversions provide a quick and easy way to convert between Pressure units. VICI Jour ® is a registered trademark of VICI AG. 785 = LPM KPA - kilo pascals Bar - unit of pressure equal to 1 atmos. Chemical Effects of Vacuum: The removal of gases from a container will reduce the number of gas atoms that are available to interact with materials in the container. The bends are too severe and they're made out of aluminum. GraphPad Prism. On the eureka there is a sign that says it is even better than a dyson. Wright Fluid Metrology Group / National Institute of Standards and Technology, Gaithersburg, MD, USA. Contact Supplier. 01463133 × p kPa. The information provided is designed to assist your product selection but should not be used exclusively in your purchase decision. 069 Atmospheres 0. 608 = Cubic metres per hour (m3/h) at standard conditions (760 mmHg and 0oC) TONNES. 41214 BTU/lb kJ/Kg 0. What is the volume of air it is using? volume, in cu. 7 inch H 2 O = 1 psi; 1 cm H 2 O = 98. A pressure of 1 Pa is small, therefore everyday pressures are often stated in kilopascals (1 kPa = 1000 Pa). If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this. The prefix "kilo" means "1,000", so one kilopascal = 1,000 Pa. Simple conversion of flow rate and pressure (vacuum) in many common units. 9983 watts, which rounds off to 1. 1% of flow on 3900 cfm system = 39 cfm. kPa - Kilopascal. 2 liters of compressed air thruogh the pipe, at 7 bar and 20 degrees. Answer / mueen ud din bajwa I need 2CFM & 10 Bar pressure what compressor should I install in KW?. The Alveolar : arterial oxygen gradient is an index of the efficiency of gas transfer across the alveolar membrane. also calculate GPM by fixture unit ? tank you. Decibels (dB) conversion calculator. Why is Pressure Drop Important? Pressure drop is a critical element in valve sizing and valve application. Volume of Compressed Air Flow upon a particular given time. Steam Pressure. Fixed detectors and lasers. Get the Sound and Total Pressure values from the table of the resulting CFM. How to Convert KPa to Liters Per Minute. 01463133 × 1 = 4. 7 psia (101. L/s to CFM Converter. Cubic Feet per Minute =. The eureka is 1/3 the cost but is it a 1/3 the value of product. ⭐️⭐️⭐️⭐️⭐️ Namimili para sa murang presyo Kawasaki Pressure Washer 100 Bar Heavy Duty (orange) By Remarks Enterprises. Oftentimes the true rate of an air compressor is misrepresented by manufacturers. 80 Facts and Figures Units, Conversion Tables, and Formulas Pressure FROM TO MULTiPLy By EXAMPLE atm (atmosphere) bar 1. The formula for pressure is. Convert Volumetric flow rate units. Calculator description. 1) California Title 24 (2013 edition, section 140. Vacuum Pump Capacity Ratings The capacity for vacuum pumps is specified in a couple of different ways, depending on the type of vacuum pump and the manufacturer. SI symbols of liter or litre is L or l. 75 = 1067. 001 kPa, or 0. 589 l/sec 0. 1 Calculate the approximate total force that will be exerted on a 4" diameter glass view port used in a vessel under high vacuum conditions. ICFM - Inlet Cubic Feet per Minute. 145 to get 200 kPa. Calculate Injector Size Based on Power Requirement. But in other cases—some involving other parts of the machine, some involving the natural frequency of the system—a simple fix is not enough to sufficiently address the. 2 liters of compressed air thruogh the pipe, at 7 bar and 20 degrees. Convert flow rate and pressure (vacuum) in common units. Here you can make instant conversion from this unit to all other compatible units. TRI–LASER, red, multi-detector, multi-angle optical system. This site also has other calculator dealing with venturi and pitot tube calculations on other pages. After pressing the Calculate Airflow button, read the CFM requirement of 34. WG to kPa) INS/WG. Calculate horsepower based on injector size. Now I just want to find the pressure I need to drop the 120PSI to using a regulator in order to get the 2 CFM through an orifice of 1". Enter the maximum pressure that the pressure transducer will measure. This means how much volume of compressed air can be generated by an air compressor when it has run for a particular amount of time. Phase I : Before milking, an air flow meter (AFM) is connected at a convenient place on the. 94 psi per 1000 feet ( psi/1000 ft ). 15 + 20) * V2 We can calculate that V2 = 67. The information provided is designed to assist your product selection but should not be used exclusively in your purchase decision. It will also allow the input of various fuels such as gasoline, E85, E98 and Methanol. The ability to calculate the density of air is important because the density of air (and other gases) varies greatly at different pressures and temperatures, yet values of the density of air are needed for a many engineering and scientific calculations, including pitot tube air velocity measurements and air resistance/drag force calculations. SCFM stands for standard cubic feet of air per minute. 3 percent of 25 is 20. Also, read about calculation procedures, what you have to know for the calculations and what limitations apply. column, SCFM – Standard Cubic Feet Per Minute. Because pressure is force divided by area, its meter-kilogram-second (MKS) units are newtons per square meter, or N/m 2. conversion data gases unites weight kilograms (kg) gas cubic meters (nm3) liquid liters (l) oxygen 1 kilogram 1. NMPS – Normal Meter Per Second From the. SI symbols of liter or litre is L or l. 068 kPa bar 0. Parts Per Million (ppm. 4 kPa after pump and by-pass line adjustments. An easy-to-use table to convert temperature units. The latest Tweets from CFM International (@CFM_engines). 1 Pa = 1 N / m 2 ≡ 1 kg / m · s 2. 01325 bar (101. Another phrase used to indicate acfm is inlet cubic feet per minute (icfm). For both cars the engine is turning at 5000 rpm. Enter the unit used for measuring pressure, e. 8 x h WhereP = hydrostatic pressure in kPa or kN/m2 h = water depth from surface in meters (m) 9. Online calculator to quickly determine Air Flow Rate through an Orifice. Read more about calculator application and check if calculator is suitable for your problem. As water passes through a hose, friction between the water and the inside surface of the hose causes turbulence, which slows the water. In countries where the metric system is more common, m3/min or m3/h is sometimes being used, but even there, CFM is the most common unit. CALCULATIONS The Pitot tube is the primary standard used to calibrate all other air-ﬂow measuring devices. The real meaning of K-factor is that the flow in gpm can be discharged from the nozzle when the pressure is 1 psi. 94 psi per 1000 feet ( psi/1000 ft ). 3 out of 5 stars 6 $139. Whilst every effort has been made in building this pressure converter, we are not to be held liable for any special, incidental, indirect or consequential damages or monetary losses of any kind arising out of or in connection with the use of the converter tools and information derived from the web site. This converter calculates the measured value in units of [ppm] into units of [mg/m 3] and visa versa. 3 867 -133-150 20 800 -200-200 26. 08) ΔT °F volts amps. The calculation based on time required for the compressor to run uses the equation "t = V (p1 - p2) / C pa" (Time for receiver to go from upper pressure limits (min) = Volume of Receiver Tank (cuft) (Maximum Tank Pressure (psi) x minimum tank pressure (psi)) / Air Needed (cfm) x 14. Many Other Conversions. Find Us (+852) 2893 6261; Unit 901~905, 9/F,Elite Centre, 22 Hung To Road, Kwun Tong, Kowloon,Hong Kong. About this Humidity calculator; Humidity is defined as the amount of water vapor in the air. 7 psia (101. calculate CFM from kpa or psi Off-Topic. As an alternative method, you can multiply the recommended Psi pressure by 6. The fill chamber is 2 cubic feet in volume so my 2 CFM would create an air change every minute. This video demonstrates two simple methods of measuring airflow in HVAC systems to optimize the performance, efficiency and comfort that is too often compromised by poor installation and set-up of. Friction Loss Explained Friction loss occurs when water passes through a hose. Rich January 4, 2007 6:13 PM I am confused. Caution NO guarantee as to the accuracy of these values is given. Answer / mueen ud din bajwa I need 2CFM & 10 Bar pressure what compressor should I install in KW?. [email protected] Hydraulex is a family of Attica Hydraulic Exchange, Flint Hydrostatics, Hydraulic Repair and Design and Metaris Hydraulics. How to Convert KPa to Liters Per Minute. Therefore, it is a natural application for use in. Now we will change the air flow rate through Section 2 from 3400 CFM to 3000 CFM. 1934 power kw hp 1. Pressure Conversion Program and ideal gas law. To calculate the required diameter of an CFM - cubic feet per minute GPM x 3. Catalytic Converters have been in use in Australia since the introduction of un-leaded petrol in 1986. Conversions are performed by using a conversion factor. 54 CFM Cubic Meters Per Hour 0. About; Products. About Converterin. Time Master II - Time Calculator for Pilots, Accounting, Broadcasting Ultra Measure Master - Most Complete, Easy-to-Use Metric Conversion Calculator Measure Master Pro - Feet-Inch-Fraction Calculator for Do-It-Yourselfers. 5 5 6 8 10 12 15 30 40 28. The number corresponds to the volume of the suction chamber. Online calculator with Saturated Steam Table by Pressure. Or, if a fire hydrant must operate at a static pressure of 40 psi, the water column equivalent to 40 psi can be computed. 01463133 inH2O. Try CEJN's converter web app, for convenient conversion between units:. Get Started! To calculate the System Pressure Drop to be looked up on the following fan curves, which are drawn at NTP conditions, enter the information required in the boxes below. Also, explore many other unit converters or learn more about pressure unit conversions. 9683 BTU Watts 3. The calculator computes many humidity attributes using ambient temperature and pressure, and relative humidity (RH).