Flow Calculations
Flow Unit Converter
Converted Flow: —
Flow Unit Converter
The Flow Unit Converter is a user-friendly tool designed to help you quickly and accurately convert flow rates between various units used in engineering, science, and daily applications. Whether you are working with liquid or gas flow rates, this calculator simplifies complex unit conversions, saving time and reducing errors.
Precision:
Ensures accurate conversions, even for small or highly specific units like per second values.
Easy-to-Use Interface:
Simply input the flow value, select the original unit, and choose the desired target unit. The result is instantly calculated and displayed.
Square Root mA Calculator
Calculated mA: — mA
Square Root mA Calculator
Explanation:
- Inputs:
- LRV (Lower Range Value).
- URV (Upper Range Value).
- PV (Process Variable).
- Formula:
- The code calculates the percentage of the PV in the range between LRV and URV.
- It applies the square root to that percentage.
- Then, it converts the square root percentage to the corresponding 4-20 mA value.
Pump Discharge Flow Rate Calculator
Flow Rate: — liters/s
Pump Discharge Flow Rate Calculator Using Velocity
Explanation:
- Input Fields:
- Pipe Diameter (mm): Enter the internal diameter of the discharge pipe in millimeters.
- Flow Velocity (m/s): Enter the velocity of the liquid moving through the pipe in meters per second.
- Calculation:
- The cross-sectional area of the pipe is calculated using the formula A=π×(r)2 where r is the pipe’s radius in meters.
- The flow rate Q is calculated as Q=A×v.
- The result is converted to liters per second.
- Result:
- The flow rate will be displayed in liters per second.
Pump Discharge Flow Rate Calculator (Using Pressure)
Flow Rate: — liters/s
Pump Discharge Flow Rate Calculator Using Pressure
Explanation:
- Inputs:
- Pipe Diameter (mm): Input the pipe’s internal diameter.
- Discharge Pressure (bar): Input the pump discharge pressure.
- Fluid Density (kg/m³): Default is set to 1000 kg/m³ (for water), but you can change it for other fluids.
- Calculation:
- Converts the pressure from bar to Pascals (Pa).
- Calculates the flow rate using the below formula.
- Converts the flow rate from cubic meters per second (m³/s) to liters per second (L/s).
- Result:
- Displays the flow rate in liters per second (L/s).

Bernoulli’s Equation Flow Rate Calculator
Flow Velocity (v₂): — m/s
Flow Rate (Q): — m³/s
Bernoulli’s Equation:
For a differential pressure flow meter, simplified Bernoulli’s equation can be written as:

Where:
- v2 = Flow velocity at the downstream (throat)
- P1 = Upstream pressure (Pascal)
- P2 = Downstream pressure (Pascal)
- ρ = Fluid density (kg/m³)
- A1 = Cross-sectional area at the upstream side (inlet)
- A2 = Cross-sectional area at the downstream side (throat)
Key Features:
- Flow Velocity Calculation: Based on Bernoulli’s Equation, it calculates the velocity.
- Flow Rate Calculation: After obtaining the velocity, the flow rate is calculated by multiplying the velocity with the cross-sectional area of the downstream pipe A₂.
Outputs:
- Flow Velocity (v₂) in meters per second (m/s)
- Flow Rate (Q) in cubic meters per second (m³/s)
This updated version calculates both flow velocity and flow rate, ensuring you have all the necessary information.
DP Flow Meter PV Calculator
Linear Output: — mA
Square Root Output: — mA
DP Type Flow Meter PV Calculator
This DP Flow Meter Calculator is designed to assist users in calculating the process variable (PV) values in m³/h or mbar based on known ranges for both units. The calculator is especially useful in applications involving differential pressure (DP) flow meters, where values need to be converted between volume flow rates and pressure to help with instrumentation setup or process monitoring.
How It Works:
- Input Fields for Ranges:
- Flow Meter LRV (m³/h) and URV (m³/h): Enter the Lower Range Value (LRV) and Upper Range Value (URV) for the flow rate in cubic meters per hour (m³/h).
- DP Transmitter LRV (mbar) and URV (mbar): Enter the corresponding LRV and URV values for the differential pressure in millibar (mbar). These represent the minimum and maximum readings of the DP transmitter.
- PV Input for Conversion:
- PV (m³/h or mbar): This input field is where you enter the process variable in either m³/h or mbar, and it will automatically calculate and display the equivalent value in the opposite unit. If you enter a value in m³/h, it will convert to mbar, and vice versa.