Process Engineering Calculator

Process engineering calculator PEngCalc contains a set of 29 common calculators grouped into one software. The software aims to provide a productive environment for all users. The calculations are carried out and produced in summarized report that can be copied and used in other external calculations. 

Process Eng Calculator

The software currently stands at 29 calculators but have the potential to grow further in the near future.


Process Engineering calculator features

Process engineering calculator contains the calculators below;

Unit converter
Orifice Design Calculator
Control Valve Sizing Calculator
Relief Valve Sizing Calculator
API Gravity calculator
Cavitation Coefficient
Cavitation Number
Erosional Velocity calculator
Head loss calculator
Heat Exchanger Unknown Temperature Calculator
Heat Transfer rate or Heat duty calculator
Hydraulic Diameter calculator
Linear interpolation calculator
LMTD calculator
MMScfd Converter
Nozzle Pressure Drop calculator
Pipe Friction Factor Calculator
Pipe Sizing Calculator
Pumping Power Calculator
Reynold’s Number Calculator
Scale Resistance Calculator
Sonic Velocity Calculator
Vapor Pressure Calculator
Velocity in Pipe Calculator
Vessel Volume Calculator
Vessels Liquid Height Calculator
Fouling Factors
Water and Steam Properties
P Prop Physical Properties tool
Miller Equation calculator
Shell-MIT Equation calculator
Aude Equation calculator
Weymouth Equation calculator


1.Unit converter23 measurements with 200 unit conversions.
2.Orifice Design CalculatorThe following features is available For Gas or Liquid;

 ·         Size an Orifice using International Standard ISO 5167-2:2003 Edition ·         Size an Orifice using Crane’s Flow of Fluids through Valves, Fittings and Pipes (Eq.3.22) ·         Support Corner tapping, D and D/2 tapping and Flange tapping for ISO method – D and D/2 tapping for Crane method·         Calculate the Mass flow rate upstream of an Orifice·         Calculate velocity, pressure loss, Reynolds’ number, Coefficient of discharge, Beta, Cross sectional area and volumetric flow rate.·         Includes Standard pipe sizes, schedules, thicknesses…etc.·         Ability to plot a chart profile for Calculated Mass flow rates versus Calculated Orifice diameters

3.Control Valve Sizing Calculatorcalculate the control valve sizing coefficient CV using Masoneilan method. Sizing options include;

·         Gas and vapor service (Calculate CV or Flow rate from a given CV)·         Liquid service Turbulent flow (Calculate CV or Flow rate from a given CV)·         Liquid service Non-Turbulent flow (Calculate CV)Two phase flow service (Calculate CV or Flow rate from a given CV)

4.Relief Valve Sizing CalculatorCarry out calculations based on equations used in API 520 “7th Edition” and API 521 “4th Edition” evaluate multiple cases for;

·         Sizing conventional and pilot operated relief valves for gas or vapour relief.·         Sizing conventional and pilot operated relief valves for liquid relief.·         Sizing conventional and pilot operated relief valves for saturated and superheated steam relief.·         Sizing conventional and pilot operated relief valves for vaporizing liquids (wetted vessels)

5.API Gravity calculatorAmerican Petroleum Institute gravity is a term often used to measure how heavy or light a petroleum liquid is comparing to water  

·         Calculating the API gravity from Liquid density or specific gravity or preloaded database of fluids. ·         Calculate the specific gravity from API gravity ·         Calculate the Barrels of crude oil per metric ton from API Gravity or select a fluid from the preloaded fluids database to perform the calculation ·         Find the classification of oil according to API gravity (Light oil, Medium oil, Heavy oil or Extra heavy oil)

6.Cavitation CoefficientUsed for Fluid flow in centrifugal pump. The calculator can also calculate the pump head providing that the Cavitation coefficient is defined
7.Cavitation NumberDimensionless number used in flow calculations analysis. the number reflects the relationship between the difference of a local pressure from the vapor pressure and the kinetic energy per volume, Cavitation number is used to characterize the potential of the flow to cavitate.  

·         Calculate the Cavitation Number ·         Back calculate the local Pressure or Fluid vapor Pressure or Fluid velocity

8.Erosional Velocity calculatorUse API RP 14E to estimate the erosional velocity, the calculator will calculate the following:  

·         Mixture Density ·         Erosional velocity ·         Minimum pipe cross sectional area

9.Head loss calculatorCalculate the head loss and pipe cross sectional area using Darcy Weisbach equation also plot profile charts of pipe cross sectional area versus head loss and velocity versus head loss
10.Heat Exchanger Unknown Temperature CalculatorCalculate any unknown one or two temperatures on the hot side or the cold side.
11.Heat Transfer rate or Heat duty calculatorCalculate the duty for sensible and latent heat transfer
12.Hydraulic Diameter calculatorCalculate the hydraulic diameter for rectangular, elliptical and annulus pipe types
13.Linear interpolation calculatorPerform linear interpolation between tabulated values.
14.LMTD calculatorCalculate the Log Mean Temperature Difference for counter current and co-current flow, also known as parallel flow arrangement.
15.MMScfd ConverterConvert mass flow or volume flow to Million Standard Cubic Feet per Day and vice versa
16.Nozzle Pressure Drop calculatorCalculate the pressure drop for nozzles in shell and tube heat exchangers
17.Pipe Friction Factor CalculatorCalculate the Darcy friction factor also commonly obtained from the Moody chart and also calculate the Fanning friction factor. Choose from two different equations CHURCHILL EQUATION or COLEBROOK-WHITE EQUATION
18.Pipe Sizing CalculatorCalculate the diameter of pipe. The calculator also has a predefined list of services the includes typical velocities which can be used for the velocity input.
19.Pumping Power CalculatorCalculate the following;  

·         Pump hydraulic power ·         Shaft power ·         Motor power

20.Reynold’s Number CalculatorCalculate the Reynold’s number for turbulent and laminar flow
21.Scale Resistance CalculatorCalculate the scale resistance or Dirt factor for shell and tube heat exchangers
22.Sonic Velocity CalculatorCalculate the gas sonic velocity (Speed of sound) in pipes. The calculator has a small database that contain 51 gases and their specific heat ratio along with their molecular weights for quick reference during calculation.
23.Vapor Pressure CalculatorUse Antoine equation constants to calculate the vapor pressure of fluids,  

·         699 available components/fluids and their equation constants included in internal database. ·         Calculate Vapor pressure at a specified temperature ·         Calculate the Temperature at specified Vapor pressure

24.Velocity in Pipe CalculatorCalculate the fluid velocity in pipe
25.Vessel Volume CalculatorCalculate the liquid volume and total volume of horizontal tank vessel, the calculator support Flat heads, ASME F&D (Dished) heads, Elliptical 2:1 Heads and Hemispherical heads
26.Vessels Liquid Height CalculatorCalculate the liquid height in a vessel. The calculator supports the following vessel ends; Flat Ends, ASME F&D (Dished Ends), Elliptical Ends and Hemispherical Ends. It can also plot a profile of the liquid volume versus the liquid height.
27.Fouling factorsFouling factor tables for various fluids
28.Water and Steam PropertiesGenerate water and steam properties
29.P Prop databaseA small physical properties database contain the properties for 500 fluids, enter a temperature and estimate the physical properties of any of the 500 fluids
30.Miller Equation calculatorUsed in hydraulics studies involving crude oil pipelines, can be used for calculating the flow rate from a given pressure drop or vice versa, the equation does not consider pipe roughness.
31.Shell-MIT Equation calculatorAlso known as MIT Equation is used for calculations of pressure drop in heavy crude oil and heated liquid pipelines.
32.Aude Equation calculatorAude equation or T.R Aude equation is used in industry to calculated the pressure drop in pipelines. The equation is used for petroleum products transported in pipelines.
33.Weymouth Equation calculatorUsed for gas pipeline systems when large pipe diameters are involved. Calculate the flow rate of gas in a pipeline. Use for compressed and high-pressure gases

Screen Shot

Process engineering calculator
Main screen for process engineering calculator

Other screen shots can be seen by following the top menu icon for “Screen shots


Click here to download the demo version of the product. Please also note that the demo version of this software will only operate with set examples which are restricted in our demo version. The demo version may also have less calculators. to check the difference please check the demo version against the update version history. The full version of this product does not have any restrictions.

We don’t offer a fully working demo version.

To check the latest updates to the full version of this software please see the version history

The is a mobile application version of this software, to read more about is on click here, alternatively visit the application page on Google Play store,

Demonstration Video Link

YouTube video link click here or watch the video on this website

System Requirement:

Process engineering calculator should run on Windows operating systems:  Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11

Microsoft .Net 4.8 should be installed on your computer for the software to run, these system files are normally included with the latest windows platforms but need installations on Windows 7.