### Flow Calculator

While this flow calculator will size your flowmeter for most liquids and gases in the more common flow unit dimensions, it is designed for flow estimation and comparison purposes only. King Instrument Company does not guarantee the accuracy of this calculator without the verification of Customer Service or Sales and is not responsible for any errors, omissions, or misrepresentations.

Choose:   Liquid Gas
Liquid
Float Material:
Liquid Specific Gravity:
Flow Rate:

Liquid Flow Calculation Results

### Manual Calculations

#### Gas Flowmeter Sizing

Click Here To Download A Printable Version

Variable area flowmeters suitable for liquid service have a capacity rating based on water at 70° Fahrenheit. Flowmeters suitable
for gas service have a capacity rating based on air at STP (70°F, 14.7 PSIA) conditions. The correction factors listed below are
used to calculate the flow capacity when using a liquid other than water or a gas other than air at STP conditions.

##### GAS CORRECTION FORMULA

Air Equivalent Flow Rate =  Customer Gas Flow Rate X Gas Correction Factor

Step 1: Convert Customer Gas Flow Rate unit of measure to a standard unit of measure for air flow (SCFM or SCCM).
Step 2: Calculate Gas Correction Factor from given values.
Step 3: Calculate the product of the Air Equivalent Flow Rate from the Customer Gas Flow Rate and the Gas Correction Factor.
Step 4: Calculate the maximum or minimum flow rate for the customer’s conditions.

Step 1: Convert Customer Gas Flow Rate unit of measure to a standard unit of measure for air flow

Customer Gas Flow Rate ________________

Converted Gas Flow Rate ________________ SCFM / SCCM

 Gas Flow Rate Conversions From To  SCFM From To SCCM SCFH Divide by 60 SCFM Multiply by 28,317 SCIM Divide by 1,728 SCFH Multiply by 472 SLPM Divide by 28.317 SCIM Multiply by 16.39 SM³/MIN Multiply by 35.31 SLPM Multiply by 1,000 SM³/HR Multiply by 0.5885 SLPH Multiply by 16.67 NM³/MIN Multiply by 37.99 SM³/MIN Multiply by 1,000,000 NM³/HR Multiply by 0.6331 SM³/HR Multiply by 16,667 SCCM Divide by 28,317 NM³/MIN Multiply by 1,075,785 KG/MIN Multiply by (29.39 ÷ SpGr) NM³/HR Multiply by 17,929 KG/HR Multiply by (0.49  ÷ SpGr) KG/MIN Multiply by (832,000 ÷ SpGr) LBS/MIN Multiply by (13.33 ÷ SpGr) KG/HR Multiply by (13,876 ÷ SpGr) LBS/HR Multiply by(0.2222 ÷ SpGr) LBS/MIN Multiply by (377,500 ÷ SpGr) LBS/DAY Multiply by (0.00926 ÷ SpGr) LBS/HR Multiply by (6,292 ÷ SpGr) ACFM Multiply by [[(Operating PSIG+14.7)(530)]÷ [(14.7)(Operating °F+460)]]

Step 2: Calculate Gas Correction Factor from given values

This information is required to size for conditions other than air at STP:

Operating Temperature: _________°F

Operating Back Pressure:_________ PSIG

Specific Gravity of Gas: _________ @STP

 Temperature Conversions Gas Density Conversions From To °Fahrenheit From To Specific Gravity °Centigrade (°C X 1.8) + 32 LBS/FT³ Divide by 0.075 °Kelvin (°K – 273.15)1.8 + 32 KG/M³ Divide by 1.2 °Rankine °R – 459.67 MolWt Divide by 29.0 g/cm³ Divide by 0.0012

 Pressure Conversions From To PSIG From To PSIG foot Water Divide by 2.308 Pa (Pa÷101,300) X 14.7 Inch Water Divide by 27.73 PSIA Minus 14.7 mm Water Divide by 704 ATM (ATM X 14.7) – 14.7 inch Hg Divide by 2.036 Torr ((Torr÷760) X14.7) – 14.7 mm Hg Divide by 51.7 Bars ((Bars÷1.013) X14.7) – 14.7 kg/cm² Multiply by 14.228 Millibar ((Millibars÷1013) X 14.7) –14.7 kPa (kPa÷101.3) X 14.7

Gas Correction Factor (GCF) formula: Step 3: Determine the Air Equivalent Flow Rate.

Air Equivalent Flow Rate = Customer Gas Flow Rate x Gas Correction Factor
Air Equivalent Flow Rate = ____________________

Step 4: Calculate the maximum or minimum flow rate for the customer’s conditions (Customer Gas Flow Rate Scale)

Customer Gas Flow Rate Scale = Catalog Flow Rate ÷ Gas Correction Factor
Customer Gas Flow Rate Scale = ______________________

#### Liquid Flowmeter Sizing

Click Here To Download A Printable Version

Variable area flowmeters suitable for liquid service have a capacity rating based on water at 70°Fahrenheit. Flowmeters
suitable for gas service have a capacity rating based on air at STP (70°F, 14.7 PSIA) conditions. The correction factors
listed below are used to calculate the flow capacity when using a liquid other than water or a gas other than air at STP conditions.

##### LIQUID CORRECTION FORMULA

Water Equivalent Flow Rate =  Customer Liquid Flow Rate X Liquid Correction Factor

Step 1: Convert Customer Liquid Flow Rate unit of measure to a standard unit of measure for water flow (GPM or CC/MIN).
Step 2: Calculate Liquid Specific GravityCorrection Factor from given values.
Step 3: Determine the Water Equivalent Flow Rate from the product of the Customer Liquid Flow Rate and the Liquid Correction Factor.
Step 4: Calculate the maximum or minimum flow rate for the customer’s conditions.

Step 1: Convert Customer Liquid Flow Rate unit of measure to a standard unit of measure for water flow.

Customer Liquid Flow Rate ________________

Converted Liquid Flow Rate _________________GPM / CC/MIN

 Liquid Flow Rate Conversions From To  GPM From To CC/MIN GPH Divide by 60 GPM Multiply by 3,785 CC/MIN Divide by 3,785 GPH Multiply by 63.08 CC/HR Divide by 227,100 CC/HR Divide by 60 LPM Multiply by 3.785 LPM Multiply by 1,000 LPH Multiply by 227.1 LPH Multiply by 16.67 M³/MIN Multiply by 264.2 M³/MIN Multiply by 1,000,000 M³/HR Multiply by 4.402 M³/HR Multiply by 16,667 PINTS/MIN Divide by 8 PINTS/MIN Multiply by 473.1 FT³/MIN Multiply by 7.48 FT³/MIN Multiply by 28,320 FT³/HR Divide by 8.021 FT³/HR Multiply by 472 KG/MIN Multiply by (0.264 ÷ SpGr) KG/MIN Multiply by (1,000 ÷ SpGr) KG/HR Divide by (227 X SpGr) KG/HR Multiply by (16.67 ÷ SpGr) LBS/MIN Divide by (8.347 X SpGr) LBS/MIN Multiply by (453.6 ÷ SpGr) LBS/HR Divide by (500.8 X SpGr) LBS/HR Multiply by (7.56 ÷ Spgr) GMS/MIN Divide by (3,785 X SpGr) GMS/MIN Divide by SpGr GMS/HR Divide by (227,000 X SpGr) GMS/HR Multiply by 3.785 Divide by (60 X SpGr)

Step 2: Calculate Liquid Correction Factor from given values

This information is required to size for liquids other than water:

Specific Gravity of Liquid:____________ @ Operating Conditions

Liquid Temperature:__________°F @ Operating Conditions

Liquid Viscosity: _________cps @Operating Conditions

Specific Gravity of the Float to be used: ___________

 Float Specific Gravity Liquid Density Conversions Teflon 2.20 316 SS 8.04 From To Specific Gravity Glass 2.53 Hastelloy C 8.94 LBS/FT³ Divide by 62.4 Sapphire 3.99 Carboloy 15.00 KG/M³ Divide by 1,000 Titanium 4.50 Tantalum 16.60 API [141.5 ÷ (131.5+API)] 316L SS 8.03 g/cm³ = SpGr

Liquid Specific Gravity Correction Factor (LSGCF) formula: 3. Determine the Water Equivalent Flow Rate

Water Equivalent Flow Rate = Customer’s Liquid Flow Rate ÷ LSGCF Water Equivalent Flow Rate = ______________________

4. Calculate the maximum or minimum flow rate for the customer’s conditions. (Customer Liquid Flow Rate Scale)

Customer Liquid Flow Rate Scale = Catalog Flow Rate ÷ LSGCF @ 70° F

Customer Liquid Flow Rate Scale = ____________________