--- title: Calculating Phase 3 Motor Horsepower description: Calculating horsepower consumption used in industrial fan operation is helpful to identify the additional amount of flow and pressure the fan can produce. --- [![New York Blower Company Logo](https://blog.nyblower.com/hubfs/New_York_Blower_June2019/Images/logo%20(1).png)](https://www.nyb.com/) [1-800-208-7918](tel:18002087918) Search - [Buy Parts Online](https://www.nyb.com/internet-sales/) - | - [Selection Software](https://apps.nyb.com/FanToSize/ProductSelection.aspx) - | - [![drawing](https://blog.nyblower.com/hubfs/New_York_Blower_June2019/Images/fan-icon.png)Drawing Package](https://apps.nyb.com/drawingsondemand) - | - [Find a Rep](https://www.nyb.com/find-a-representative/) [Contact Us](https://www.nyb.com/contact-us/) - [Products](https://www.nyb.com/products/) - [Inline Fans](https://www.nyb.com/inline-fans/) - [Duct Fans](https://www.nyb.com/inline-duct-fans-axial-flow-blower/) - [Industrial Duct Fans](https://www.nyb.com/industrial-duct-fan/) - [Tubeaxial](https://www.nyb.com/tubeaxial-fans-direct-drive-tubeaxial-blowers/) - [Vaneaxial](https://www.nyb.com/vaneaxial-fans-high-pressure-vaneaxial-fans/) - [Vaneaxial Fixed Pitch](https://www.nyb.com/vaneaxial-fixed-pitch-fans/) - [Direct Drive Vaneaxial Fixed Pitch](https://www.nyb.com/direct-drive-vaneaxial-fixed-pitch/) - [Vaneaxial Adjustable Pitch](https://www.nyb.com/vaneaxial-adjustable-pitch-fans/) - [Tubular AcoustaFoil™](https://www.nyb.com/tubular-acoustafoil-tubular-centrifugal-fan/) - [Propeller Fans](https://www.nyb.com/propeller-fans-sidewall-exhaust-fans/) - [Centrifugal Fans](https://www.nyb.com/centrifugal-fans/) - [Forward Curved](https://www.nyb.com/forward-curved/) - [Backward Inclined](https://www.nyb.com/backward-inclined/) - [Radial](https://www.nyb.com/radial/) - [Radial Tip](https://www.nyb.com/radial-tip/) - [Pressure Blowers](https://www.nyb.com/pressure-blowers/) - [Custom Fans](https://www.nyb.com/custom-fans/) - [Centrifugal Ventilator Fans](https://www.nyb.com/centrifugal-ventilator-fans/) - [General Purpose Fans](https://www.nyb.com/general-purpose-fans/) - [Square Fans](https://www.nyb.com/square-fans/) - [Junior Fans](https://www.nyb.com/junior-fans/) - [Axial Ventilator Products](https://www.nyb.com/axial-ventilator-products/) - [Upblast Roof Ventilators](https://www.nyb.com/upblast-roof-ventilators/) - [Hooded Roof Ventilators](https://www.nyb.com/hooded-roof-ventilators/) - [Centrifugal Roof Ventilators](https://www.nyb.com/centrifugal-roof-ventilators/) - [Plenums and Double Widths](https://www.nyb.com/plenums-and-double-widths/) - [Airfoil Plenum](https://www.nyb.com/airfoil-plenum/) - [Cube Array Plenum Fans](https://www.nyb.com/cube-array-plenum-fans/) - [Backward Inclined DWDI](https://www.nyb.com/backward-inclined-dwdi/) - [FA / EZ Plenum](https://www.nyb.com/fa-ez-plenum/) - [Forward Curved DWDI](https://www.nyb.com/forward-curved-dwdi/) - [Fiberglass Reinforced Plastic Fans](https://www.nyb.com/fiberglass-reinforced-plastic-fans/) - [FRP Fume Exhauster](https://www.nyb.com/frp-fume-exhauster/) - [FRP General Purpose Fume Exhauster](https://www.nyb.com/frp-general-purpose-fume-exhauster/) - [FRP Pressure Blower](https://www.nyb.com/frp-pressure-blower/) - [FRP Radial Fume Exhauster](https://www.nyb.com/frp-radial-fume-exhauster/) - [Process Heat or Plug Fans](https://www.nyb.com/process-heat-or-plug-fans/) - [Air Kits](https://www.nyb.com/air-kits/) - [Plug Fans](https://www.nyb.com/plug-fans/) - [OEM Wheels and Cones](https://www.nyb.com/oem-wheels-and-cones/) - [Fan Components](https://www.nyb.com/fan-components/) - [Silencers / Flex Connectors](https://www.nyb.com/silencers-flex-connectors/) - [Steam Coil Products](https://www.nyb.com/steam-coil-products/) - [Unit Heaters](https://www.nyb.com/unit-heaters/) - [Steelfin Coils](https://www.nyb.com/steelfin-coils/) - [Replacement Parts](https://www.nyb.com/replacement-parts/) - [Industries](https://www.nyb.com/industries/) - [Agriculture](https://www.nyb.com/agriculture/) - [Automotive](https://www.nyb.com/automotive/) - [Brick](https://www.nyb.com/brick/) - [Car Wash](https://www.nyb.com/car-wash/) - [Cement and Lime](https://www.nyb.com/cement-and-lime/) - [Clean Rooms](https://www.nyb.com/clean-rooms/) - [Coal](https://www.nyb.com/coal/) - [Ethanol](https://www.nyb.com/ethanol/) - [Fertilizer](https://www.nyb.com/fertilizer/) - [Foundry](https://www.nyb.com/foundry/) - [Glass](https://www.nyb.com/glass/) - [Graphic Arts](https://www.nyb.com/graphic-arts/) - [Heavy Industrial Fans](https://www.nyb.com/heavy-industrial-fans/) - [Iron and Steel](https://www.nyb.com/combustion-systems-and-furnaces/) - [Kaolin and Clay](https://www.nyb.com/kaolin-and-clay/) - [Marine](https://www.nyb.com/marine/) - [Metals and Minerals](https://www.nyb.com/metals-and-minerals/) - [Microchip](https://www.nyb.com/microchip/) - [Mining](https://www.nyb.com/mining/) - [Nuclear](https://www.nyb.com/nuclear/) - [Paper and Pulp](https://www.nyb.com/paper-and-pulp/) - [Petrochemical](https://www.nyb.com/petrochemical/) - [Pharmaceutical](https://www.nyb.com/pharmaceutical/) - [Power Generation](https://www.nyb.com/power-generation/) - [Railroad and Locomotive](https://www.nyb.com/railroad-and-locomotive/) - [Snow Making](https://www.nyb.com/snow-making/) - [Transportation](https://www.nyb.com/transportation/) - [Water Treatment](https://www.nyb.com/water-treatment/) - [Applications](https://www.nyb.com/applications/) - [Aeration](https://www.nyb.com/aeration/) - [Air Slides](https://www.nyb.com/air-slides/) - [Blow-Off](https://www.nyb.com/blow-off/) - [Combustion Air](https://www.nyb.com/combustion-air/) - [Containment](https://www.nyb.com/containment/) - [Cooling Towers](https://www.nyb.com/cooling-towers/) - [Dilution Air](https://www.nyb.com/dilution-air/) - [Dryers](https://www.nyb.com/dryers/) - [Dust Control](https://www.nyb.com/dust-control/) - [Fluidized Systems](https://www.nyb.com/fluidized-systems/) - [Forced Draft](https://www.nyb.com/forced-draft/) - [Fume Control](https://www.nyb.com/fume-control/) - [Fume Exhausting](https://www.nyb.com/fume-exhausting/) - [General Ventilation](https://www.nyb.com/general-ventilation/) - [Grain Drying](https://www.nyb.com/grain-drying/) - [HVAC](https://www.nyb.com/hvac/) - [Incineration](https://www.nyb.com/incineration/) - [Induced Draft](https://www.nyb.com/induced-draft/) - [Lab Hood Exhaust](https://www.nyb.com/lab-hood-exhaust/) - [Material Handling](https://www.nyb.com/material-handling/) - [Odor Control](https://www.nyb.com/odor-control/) - [Oil Mist](https://www.nyb.com/oil-mist/) - [Oven Exhaust](https://www.nyb.com/oven-exhaust/) - [Oven Recirculation](https://www.nyb.com/oven-recirculation/) - [Oxidizers](https://www.nyb.com/oxidizers/) - [Pickling](https://www.nyb.com/pickling/) - [Pneumatic Conveying](https://www.nyb.com/pneumatic-conveying/) - [Pollution Control](https://www.nyb.com/pollution-control/) - [Pressurizing](https://www.nyb.com/pressurizing/) - [Process Control](https://www.nyb.com/process-control/) - [Process Cooling](https://www.nyb.com/process-cooling/) - [Process Heating](https://www.nyb.com/process-heating/) - [Refrigeration](https://www.nyb.com/refrigeration/) - [Scrubber](https://www.nyb.com/scrubber/) - [Snow Making](https://www.nyb.com/snow-making-app/) - [Spark Resistant Construction](https://www.nyb.com/spark-resistant-construction/) - [Spray Booth Exhaust](https://www.nyb.com/spray-booth-exhaust/) - [Tempering](https://www.nyb.com/tempering/) - [Vacuum Systems](https://www.nyb.com/vacuum-systems/) - [Wind Tunnels](https://www.nyb.com/wind-tunnels/) - [Support Tools](https://www.nyb.com/support-tools/) - [Mobile App](https://www.nyb.com/app/) - [Online Fan Selection Software](https://www.nyb.com/online-fan-selection-software/) - [Online Drawing Package](https://www.nyb.com/online-drawing-package/) - [Product Bulletins](https://www.nyb.com/productbulletins/) - [Specs and Dimensions](https://www.nyb.com/specs-and-dimensions/) - [Engineering Letters](https://www.nyb.com/engineering-letters/) - [Maintenance Manuals](https://www.nyb.com/maintenance-manuals/) - [Centrifugal Fan Arrangements](https://www.nyb.com/centrifugal-fan-arrangements/) - [Axial Fan Arrangements](https://www.nyb.com/axial-fan-arrangements/) - [Fan Rotation and Discharge](https://www.nyb.com/fan-rotation-and-discharge/) - [Motor Positions](https://www.nyb.com/motor-positions/) - [About NYB Drawings](https://www.nyb.com/about-nyb-drawings/) - [Rep Finder](https://www.nyb.com/rep-finder/) - [Testing](https://www.nyb.com/testing-and-services/) - [Air Performance Testing](https://www.nyb.com/air-performance-testing/) - [Leakage Testing](https://www.nyb.com/leakage-testing/) - [Sound Performance Testing](https://www.nyb.com/sound-performance-testing/) - [Vibration Testing](https://www.nyb.com/vibration-testing/) - [Destruction/Deformation Testing](https://www.nyb.com/destruction-testingdestruction/deformation-testing/) - [Stress Analysis](https://www.nyb.com/stress-analysis/) - [Environmental Testing](https://www.nyb.com/environmental-testing/) - [Material Certification](https://www.nyb.com/material-certification/) - [Wheel Balancing](https://www.nyb.com/wheel-balancing/) - [Weld Documentation](https://www.nyb.com/weld-documentation/) - [Mechanical Run Tests](https://www.nyb.com/mechanical-run-tests/) - [Shaft Run Out Verification](https://www.nyb.com/shaft-run-out-verification/) - [Barcol Hardness Testing](https://www.nyb.com/barcol-hardness-testing/) - [Modal Analysis](https://www.nyb.com/modal-analysis/) - [Impact Testing](https://www.nyb.com/impact-testing/) - [NDE Weld Analysis](https://www.nyb.com/nde-weld-analysis/) - [Wheel Deconstruction / Deformation Testing](https://www.nyb.com/wheel-deconstruction-deformation-testing/) - [Positive Material Identification/ Verification](https://www.nyb.com/positive-material-identification/-verification/) - [Finite Element Analysis](https://www.nyb.com/finite-element-analysis/) - [Computational Fluid Dynamics](https://www.nyb.com/computational-fluid-dynamics/) - [Prototype / Product Evaluation](https://www.nyb.com/prototype-/-product-evaluation/) - [Safety Equipment](https://www.nyb.com/safety-equipment/) - [Services](https://www.nyb.com/services/) - [Engineering Analysis](https://www.nyb.com/engineering-analysis/) - [Field Services](https://www.nyb.com/field-services/) - [Balancing Capabilities](https://www.nyb.com/balancing-capabilities/) - [Testing Capabilities](https://www.nyb.com/testing-capabilites/) - [Preventative Maintenance](https://www.nyb.com/preventative-maintenance/) - [Replacement Parts](https://www.nyb.com/replacement-parts/) - [Repair & Rebuild](https://www.nyb.com/repair-and-rebuild/) - [Aftermarket Retrofit](https://www.nyb.com/aftermarket-retrofit/) - [About](https://www.nyb.com/why-nyb/) - [Mission](https://www.nyb.com/mission/) - [History](https://www.nyb.com/history/) - [Shows/Conferences](https://www.nyb.com/trade-shows/) - [Training Seminars](https://www.nyb.com/training-seminars/) - [Timely Delivery](https://www.nyb.com/timely-delivery/) - [Quality Assurance](https://www.nyb.com/quality-assurance/) - [Mechanovent Integration](https://www.nyb.com/mechanovent-integration/) - [MAS Integration](https://www.nyb.com/mas-integration-nyb/) - [Industry Links](https://www.nyb.com/industry-links/) - [Latest News](https://blog.nyblower.com) - [Careers](https://www.nyb.com/careers/) - [Gallery](https://www.nyb.com/multimedia-gallery/) ### SEARCH ###### Quick Links [Info about my fan.](https://www.nyb.com/individual-fan-information/) [Talk to someone from nyb.](https://www.nyb.com/contact-us/) [Order replacement parts.](https://apps.nyb.com/InternetSales/) [Trying to find a product.](https://www.nyb.com/products/) [![New York Blower Company Logo](https://blog.nyblower.com/hubfs/New_York_Blower_June2019/Images/logo%20(1).png)](https://www.nyb.com/) [1-800-208-7918](tel:18002087918) Search - [Buy Parts Online](https://www.nyb.com/internet-sales/) - | - [Selection Software](https://apps.nyb.com/FanToSize/ProductSelection.aspx) - | - [![drawing](https://blog.nyblower.com/hubfs/New_York_Blower_June2019/Images/fan-icon.png)Drawing Package](https://apps.nyb.com/drawingsondemand) - | - [Find a Rep](https://www.nyb.com/find-a-representative/) - [Products](https://www.nyb.com/products/) - [Inline Fans](https://www.nyb.com/inline-fans/) - [Duct Fans](https://www.nyb.com/inline-duct-fans-axial-flow-blower/) - [Industrial Duct Fans](https://www.nyb.com/industrial-duct-fan/) - [Tubeaxial](https://www.nyb.com/tubeaxial-fans-direct-drive-tubeaxial-blowers/) - [Vaneaxial](https://www.nyb.com/vaneaxial-fans-high-pressure-vaneaxial-fans/) - [Vaneaxial Fixed Pitch](https://www.nyb.com/vaneaxial-fixed-pitch-fans/) - [Direct Drive Vaneaxial Fixed Pitch](https://www.nyb.com/direct-drive-vaneaxial-fixed-pitch/) - [Vaneaxial Adjustable Pitch](https://www.nyb.com/vaneaxial-adjustable-pitch-fans/) - [Tubular AcoustaFoil™](https://www.nyb.com/tubular-acoustafoil-tubular-centrifugal-fan/) - [Propeller Fans](https://www.nyb.com/propeller-fans-sidewall-exhaust-fans/) - [Centrifugal Fans](https://www.nyb.com/centrifugal-fans/) - [Forward Curved](https://www.nyb.com/forward-curved/) - [Backward Inclined](https://www.nyb.com/backward-inclined/) - [Radial](https://www.nyb.com/radial/) - [Radial Tip](https://www.nyb.com/radial-tip/) - [Pressure Blowers](https://www.nyb.com/pressure-blowers/) - [Custom Fans](https://www.nyb.com/custom-fans/) - [Centrifugal Ventilator Fans](https://www.nyb.com/centrifugal-ventilator-fans/) - [General Purpose Fans](https://www.nyb.com/general-purpose-fans/) - [Square Fans](https://www.nyb.com/square-fans/) - [Junior Fans](https://www.nyb.com/junior-fans/) - [Axial Ventilator Products](https://www.nyb.com/axial-ventilator-products/) - [Upblast Roof Ventilators](https://www.nyb.com/upblast-roof-ventilators/) - [Hooded Roof Ventilators](https://www.nyb.com/hooded-roof-ventilators/) - [Centrifugal Roof Ventilators](https://www.nyb.com/centrifugal-roof-ventilators/) - [Plenums and Double Widths](https://www.nyb.com/plenums-and-double-widths/) - [Airfoil Plenum](https://www.nyb.com/airfoil-plenum/) - [Cube Array Plenum Fans](https://www.nyb.com/cube-array-plenum-fans/) - [Backward Inclined DWDI](https://www.nyb.com/backward-inclined-dwdi/) - [FA / EZ Plenum](https://www.nyb.com/fa-ez-plenum/) - [Forward Curved DWDI](https://www.nyb.com/forward-curved-dwdi/) - [Fiberglass Reinforced Plastic Fans](https://www.nyb.com/fiberglass-reinforced-plastic-fans/) - [FRP Fume Exhauster](https://www.nyb.com/frp-fume-exhauster/) - [FRP General Purpose Fume Exhauster](https://www.nyb.com/frp-general-purpose-fume-exhauster/) - [FRP Pressure Blower](https://www.nyb.com/frp-pressure-blower/) - [FRP Radial Fume Exhauster](https://www.nyb.com/frp-radial-fume-exhauster/) - [Process Heat or Plug Fans](https://www.nyb.com/process-heat-or-plug-fans/) - [Air Kits](https://www.nyb.com/air-kits/) - [Plug Fans](https://www.nyb.com/plug-fans/) - [OEM Wheels and Cones](https://www.nyb.com/oem-wheels-and-cones/) - [Fan Components](https://www.nyb.com/fan-components/) - [Silencers / Flex Connectors](https://www.nyb.com/silencers-flex-connectors/) - [Steam Coil Products](https://www.nyb.com/steam-coil-products/) - [Unit Heaters](https://www.nyb.com/unit-heaters/) - [Steelfin Coils](https://www.nyb.com/steelfin-coils/) - [Replacement Parts](https://www.nyb.com/replacement-parts/) - [Industries](https://www.nyb.com/industries/) - [Agriculture](https://www.nyb.com/agriculture/) - [Automotive](https://www.nyb.com/automotive/) - [Brick](https://www.nyb.com/brick/) - [Car Wash](https://www.nyb.com/car-wash/) - [Cement and Lime](https://www.nyb.com/cement-and-lime/) - [Clean Rooms](https://www.nyb.com/clean-rooms/) - [Coal](https://www.nyb.com/coal/) - [Ethanol](https://www.nyb.com/ethanol/) - [Fertilizer](https://www.nyb.com/fertilizer/) - [Foundry](https://www.nyb.com/foundry/) - [Glass](https://www.nyb.com/glass/) - [Graphic Arts](https://www.nyb.com/graphic-arts/) - [Heavy Industrial Fans](https://www.nyb.com/heavy-industrial-fans/) - [Iron and Steel](https://www.nyb.com/combustion-systems-and-furnaces/) - [Kaolin and Clay](https://www.nyb.com/kaolin-and-clay/) - [Marine](https://www.nyb.com/marine/) - [Metals and Minerals](https://www.nyb.com/metals-and-minerals/) - [Microchip](https://www.nyb.com/microchip/) - [Mining](https://www.nyb.com/mining/) - [Nuclear](https://www.nyb.com/nuclear/) - [Paper and Pulp](https://www.nyb.com/paper-and-pulp/) - [Petrochemical](https://www.nyb.com/petrochemical/) - [Pharmaceutical](https://www.nyb.com/pharmaceutical/) - [Power Generation](https://www.nyb.com/power-generation/) - [Railroad and Locomotive](https://www.nyb.com/railroad-and-locomotive/) - [Snow Making](https://www.nyb.com/snow-making/) - [Transportation](https://www.nyb.com/transportation/) - [Water Treatment](https://www.nyb.com/water-treatment/) - [Applications](https://www.nyb.com/applications/) - [Aeration](https://www.nyb.com/aeration/) - [Air Slides](https://www.nyb.com/air-slides/) - [Blow-Off](https://www.nyb.com/blow-off/) - [Combustion Air](https://www.nyb.com/combustion-air/) - [Containment](https://www.nyb.com/containment/) - [Cooling Towers](https://www.nyb.com/cooling-towers/) - [Dilution Air](https://www.nyb.com/dilution-air/) - [Dryers](https://www.nyb.com/dryers/) - [Dust Control](https://www.nyb.com/dust-control/) - [Fluidized Systems](https://www.nyb.com/fluidized-systems/) - [Forced Draft](https://www.nyb.com/forced-draft/) - [Fume Control](https://www.nyb.com/fume-control/) - [Fume Exhausting](https://www.nyb.com/fume-exhausting/) - [General Ventilation](https://www.nyb.com/general-ventilation/) - [Grain Drying](https://www.nyb.com/grain-drying/) - [HVAC](https://www.nyb.com/hvac/) - [Incineration](https://www.nyb.com/incineration/) - [Induced Draft](https://www.nyb.com/induced-draft/) - [Lab Hood Exhaust](https://www.nyb.com/lab-hood-exhaust/) - [Material Handling](https://www.nyb.com/material-handling/) - [Odor Control](https://www.nyb.com/odor-control/) - [Oil Mist](https://www.nyb.com/oil-mist/) - [Oven Exhaust](https://www.nyb.com/oven-exhaust/) - [Oven Recirculation](https://www.nyb.com/oven-recirculation/) - [Oxidizers](https://www.nyb.com/oxidizers/) - [Pickling](https://www.nyb.com/pickling/) - [Pneumatic Conveying](https://www.nyb.com/pneumatic-conveying/) - [Pollution Control](https://www.nyb.com/pollution-control/) - [Pressurizing](https://www.nyb.com/pressurizing/) - [Process Control](https://www.nyb.com/process-control/) - [Process Cooling](https://www.nyb.com/process-cooling/) - [Process Heating](https://www.nyb.com/process-heating/) - [Refrigeration](https://www.nyb.com/refrigeration/) - [Scrubber](https://www.nyb.com/scrubber/) - [Snow Making](https://www.nyb.com/snow-making-app/) - [Spark Resistant Construction](https://www.nyb.com/spark-resistant-construction/) - [Spray Booth Exhaust](https://www.nyb.com/spray-booth-exhaust/) - [Tempering](https://www.nyb.com/tempering/) - [Vacuum Systems](https://www.nyb.com/vacuum-systems/) - [Wind Tunnels](https://www.nyb.com/wind-tunnels/) - [Support Tools](https://www.nyb.com/support-tools/) - [Mobile App](https://www.nyb.com/app/) - [Online Fan Selection Software](https://www.nyb.com/online-fan-selection-software/) - [Online Drawing Package](https://www.nyb.com/online-drawing-package/) - [Product Bulletins](https://www.nyb.com/productbulletins/) - [Specs and Dimensions](https://www.nyb.com/specs-and-dimensions/) - [Engineering Letters](https://www.nyb.com/engineering-letters/) - [Maintenance Manuals](https://www.nyb.com/maintenance-manuals/) - [Centrifugal Fan Arrangements](https://www.nyb.com/centrifugal-fan-arrangements/) - [Axial Fan Arrangements](https://www.nyb.com/axial-fan-arrangements/) - [Fan Rotation and Discharge](https://www.nyb.com/fan-rotation-and-discharge/) - [Motor Positions](https://www.nyb.com/motor-positions/) - [About NYB Drawings](https://www.nyb.com/about-nyb-drawings/) - [Rep Finder](https://www.nyb.com/rep-finder/) - [Testing](https://www.nyb.com/testing-and-services/) - [Air Performance Testing](https://www.nyb.com/air-performance-testing/) - [Leakage Testing](https://www.nyb.com/leakage-testing/) - [Sound Performance Testing](https://www.nyb.com/sound-performance-testing/) - [Vibration Testing](https://www.nyb.com/vibration-testing/) - [Destruction/Deformation Testing](https://www.nyb.com/destruction-testingdestruction/deformation-testing/) - [Stress Analysis](https://www.nyb.com/stress-analysis/) - 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Once calculated, this information can be used to identify the additional amount of flow and pressure the fan can produce within the limitations of the motor. To perform the calculations, we just need two field measurements which include the motors amperage draw and the line voltage (both can be measured with a voltage meter) and two items shown on the motor’s nameplate. This includes motor efficiency (often shown as “NEMA NOM. EFF.”) and power factor (shown as “PF”).   The formula used to calculate motor horsepower is straight forward: Horsepower (3 phase) = (Volts x Amps x Efficiency x 1.732 x Power Factor) ÷ 746 If the above 50 hp motor is operating at 466 volts and drawing 43 amps (average across each of the 3 electrical leads), the fan’s operating horsepower can be calculated: (466 Volts x 43 Amps x 1.732 x  0.945 Efficiency x 0.85 Power Factor) ÷ 746 = 37.37 Horsepower Note that this result includes the fan’s drive losses (bearings and v-belt drive/or coupling). Using the following  variation of the fan laws, this information can be helpful in determining how much the fan’s speed can be increased within the limitations of the electrical systems and how much additional flow the fan can produce. RPMnew = 3√(Horespowernew ÷ Horespowerold) x RPMold CFMnew = RPMnew ÷ RPMold If the existing fan is currently moving 20,000 CFM, generating 10” SP, consuming 37.37 horsepower, operating at 1300 rpm and has a maximum operating speed of 1500 rpm, how much additional flow can it produce if the 50 horsepower motor is maxed out: 3√(50 Horsepowernew ÷ 37.37 Horespowerold) x 1,300 RPMold = 1,432 RPMnew Since the speed is less than 1500 RPM, we can calculate out the new flow and pressure: 1,432 RPMnew ÷ 1,300 RPMold = 22,031 CFMnew (1,432 RPMnew ÷ 1,300 RPMold)2 x 10” SP = 12” SP ### You May Like [![NYB Suqian facility](https://blog.nyblower.com/hubfs/NYB%20Suqian%20facility.jpg)](https://blog.nyblower.com/suqian-facility-open-for-production) [Suqian Facility Open for Production](https://blog.nyblower.com/suqian-facility-open-for-production) Oct 9, 2019 ## Join the Newsletter ![Select_Industrial_Fan_mockup](https://blog.nyblower.com/hs-fs/hubfs/Select_Industrial_Fan_mockup.png?width=180&name=Select_Industrial_Fan_mockup.png) ### Get news and resources delivered directly to your inbox Sign up for our regular email newsletter to stay updated on the latest news, industry trends, and helpful resources regarding our industry. **Join now** and we'll send you your copy of the helpful e-guide, **"How to Successfully Select and Industrial Fan."** ### Sign Up Here [![New York Blower Company Logo](https://blog.nyblower.com/hubfs/New_York_Blower_June2019/Images/logo.png)](https://www.nyb.com/) [7660 Quincy St. Willowbrook,Illinois 60527](https://goo.gl/maps/kBBizGevzvt) [Buy Parts Online](https://apps.nyb.com/InternetSales/) [![drawing](https://blog.nyblower.com/hubfs/New_York_Blower_June2019/Images/fan-icon.png)Drawing Package](https://apps.nyb.com/drawingsondemand) [1-800-208-7918](tel:18002087918) [Selection Software](https://apps.nyb.com/FanToSize/ProductSelection.aspx) [Find a Rep](https://www.nyb.com/find-a-representative/) [BACK TO TOP](https://blog.nyblower.com/calculating-phase-3-motor-horsepower#top) © 2019 New York Blower Company, All Rights Reserved. | [Privacy Policy](https://www.nyb.com/privacy-policy/) | [Sitemap](https://www.nyb.com/sitemap/)| [Terms & Conditions](https://www.nyb.com/pdf/conditions.pdf) | [Terms of Use](https://www.nyb.com/pdf/sitetermsofuse.pdf) |