**A**

- Algerbra Calculator – Solve for “4” unknows – Algebra calculator for solving 4 unknowns.
- A Dictionary of Units – This provides a summary of most of the units of measurement used today together with the appropriate conversion factors needed to change them into a ‘standard’ unit of the S I.
- A Glossary of Glassmaking Terms – Terminology provided by the Corning Museum of Glass.
- A GLOSSARY OF SELECTED TERMS USED IN THE OIL INDUSTRY – By the Institute of Petroleum.
- Acceleration Conversion Factors – Select units to convert from and to.
- Acid Dew Point Calculations – Input process variables to calculate the dew point of an acid.
- Adobe Acrobat Reader – Adobe Acrobat Reader is free software that lets you view and print Adobe Portable Document Format (PDF) files.
- Air Leak Chart -Compressed air leaks can be very costly. Charts show typical costs associated with leaks of various sizes.
- Aluminum Alloys Database – This database allows you to check the resistance of various aluminum alloys to SCC in various environments.
- An Interactive Quiz on Boilers and HRSGs – Utility to assist plant engineers keep current on their boiler/HRSG skills.
- Angle Converter – Convert to and from degrees, grades, minutes, quadrants, radians, revolutions, etc.
- Angle Converter – Geometry calculator for angles.
- ASL Fingerspelling – Americal Sign Language finger spelling dictionary, ASL finger spelling converter, and more.

**B**

- Beam Calculators – For various beam configurations, select a type, boundary condition, and loading.
- Bearing Fit Tolerance Chart – Table of basic numbers, nominal bore in mm, and shaft rotating minimum and maximum diameters in inches.
- Boiler Duty Calculations – Input process variables to calculate boiler duty.
- Boiler Efficiency Calculations – Input process variables to calculate boiler efficiency.
- Boiler Energy Conservation Guide and Calculator – Recommendations and calculators for optimizing industrial boiler performance for decreased energy and other operational costs.
- Boiler Water Glossary – Terminology provided by Saftek Boiler and Machinery.
- Boyle’s Law Calculator – Boyles Law states that the volume of a fixed mass of gas at a constant temperature is inversely proportional to the pressure of the gas.
- Brittle Failure Calculator – For a given stress state and safety factor, this calculator applies the maximum normal stress criterion and Mohr’s theory to check if the principal stresses exceed a given tensile or compressive strength.
- BTU Calculator – This calculator is designed to give an estimate of the heating needs of a room, combination of rooms, or an entire building.

**C**

- Calculating Condensate Loads – When the normal condensate load is not known, the load can be approximately calculated using this formula.
- Centrifugal Compressor Sizing This procedure determines the number of compression stages, discharge temperature, head and both gas and brake horsepower required per stage for a centrifugal compressor.
- Ceramic Materials Data Examples of materials data for ceramic materials.
- Charles’ Law Calculator Charles’ Law states that the volume of a fixed mass of gas at a constant pressure is directly proportional to its absolute temperature.
- Chemical Equation Balancer Chemical equation balancer to balance such chemical equations as C6H12O6 + O2 = H2O + CO2.
- Circle, Sphere & Cylinder Calculator Geometry calculator for circles, spheres, and cylinders.
- Circular Duct Differential Pressure Calculator You input the diameter of the duct in inches, and the flow rate through the duct in cubic feet per minute.
- Circular Duct Flow Rate Calculator You input the diameter of the duct in inches, and the differential pressure across the duct in WC.
- Coefficient of Heat Transfer Converter Coefficient of heat transfer conversion factors.
- Combined Gas Law Calculator Used when pressure, volume and temperature change.
- Common Piping Terminology By the Flex-Hose Company.
- Comparisons of Materials: Coefficient of Thermal Expansion Table of coefficients for many metals, and several ceramic materials.
- Compression Spring Calculators Frustrated by reading spring catalogs trying to figure out which spring gives you the right force or displacement? Maybe one of these calculators can help you.
- Concentration Conversion Factors Select units to convert from and to.
- Conversions of Industrial Gases Convert a gas from one unit of measure to another.
- Copper Alloys Database This database allows you to check the resistance of various copper alloys to SCC in various environments.
- Corrosion Rate Calculator Calculate corrosion rate in 4 quick steps by specifying weight loss, area, density and time. This popular utility allows you to specify values and gives the output in a wide variety of units.
- Crib Sheet for Plating A periodic table for plating, electrochemical equivalents, troubleshooting nuggets and other little used facts.
- Crude Oil & Products Volume, weight, and flow rate conversion factors.
- Crystal Lattice Structures This page offers a concise index of common crystal lattice structures. A graphical representation as well as useful information about the lattices can be obtained by clicking on the desired structure.
- Cubic Equation Calculator Algebra calculator for cubic equations.

**D**

- Diameter of a Particle Falling at Terminal Velocity This procedure calculates the diameter of a single rigid particle falling at terminal velocity in a Newtonian fluid under the influence of gravity and is applicable to the laminar, transitional, and turbulent flow regimes.
- Dictionary of Mining, Mineral, and Related Terms From the U.S. Bureau of Mines Dictionary of Mining, Mineral, and Related Terms.
- Dictionary of Terms commonly used in Compressed Air Systems Many of these terms apply to other gases.
- Drill Size Chart Gives the decimal value for standard drill sizes.
- Ductile Failure Calculator For a given stress state and safety factor, this calculator applies the maximum shear stress criterion and von Mises criterion to check if the maximum shear stress exceeds the given yield strength.

**E**

- Elastic Constant Converter Calculator that allows you to convert from any 2 constants to all others in common use.
- Energy, Environmental, and Economics (E3) Handbook Information on a wide number of topics generally associated with energy and environmental research and development, such as environmental regulations, technology transfer issues, energy statistics, etc.
- Engineering Conversion Factors Calculators for energy, pressure, volume, density, specific volume, specific heat, enthalpy, thermal conductivity, viscosity, and coefficient of heat transfer.
- Engineering Material Properties Table gives various engineering material properties listed alphabetically. The units are SI.
- Engineering Unit Conversion Calculator Converts area, density, energy, force, length, mass, power, pressure, speed, temperature, and volume.
- Engineering Units Conversion Convert quantities like Energy, Pressure, Enthalpy, Entropy and Viscosity from one system of units to another.
- Evaluating Heat Transfer Fluids Utility Need a heat transfer fluid? This utility provides an easy way to compare the technical specifications of a range of fluids.

**F**

- Financing Made Easy Directory of financing sites that help you with bankruptcy, refinancing and second mortgages
- Flow and Level Measurement Glossary By Omega Engineering.
- Fluid Flow Glossary By the University of Texas Department of Petroleum and Geosystems Engineering.
- Foil Terminology Glossary Foil center explains terms specific to foil production such as luster, tension leveling, strain hardening and more.
- Force Converter Convert to and from dyne, joules, kilograms, newtons, pounds, tons, etc.
- Fraction Calculator This calculator tells you where your decimal fraction stands on the 1/8, 1/16, 1/32, and 1/64 scales.
- Free SDOF System Calculator This calculator returns the natural frequencies, damping ratio, and the closed-form solution for a Single-Degree-Of-Freedom mass-spring-damper system.
- Frequency & Wavelength Calculator Input and output is in Hertz, centimeters and electron volts.

**G**

- Gage Calculator There are so many systems for gaging wires and sheets. This calculator allows you to convert back and forth between gages and the actual decimal numbers in different standards.
- Gas Compressibility Factor This procedure calculates the compressibility factor of a real gas using the Redlich Kwong equation of state.
- Gas Law Constant NIST 1986 CODATA recommended values of the fundamental physical constants.
- Glossary of Capacitor Terms Published by Farad Net.
- Glossary of Control and Instrumentation Terms By the Institute of Instrumentation and Control Australia.
- Glossary of Corrosion Terms Published by Corrosionsource.
- Glossary of Electronic Control Terms Published by Omega Engineering.
- Glossary of Metallurgical Terms Published by AlloyTech.
- GLOSSARY OF PLATING TERMS Terminology provided by Tanury Industries.
- Glossary of Steam Terms Short glossary is a work in process by various contributors.
- Glossary of Terms Used in Die Casting By the North American Die Casting Association.

**H**

- Half-Life Calculator Calculations involving the exponential deacay of radioactive materials.
- Hardness Conversion Table Convert Rockwell, Superficial Rockwell, Brinell, Vickers, Sclero-Scope, and Tensile Strength numbers.
- Hardness Converter This calculator explains and inter-converts commonly used hardness scales, including Brinell, Knoop, Mohs, Rockwell, Shore, and Vickers.
- Hazardous Chemicals Database Allows you to retrieve information for any of over 1300 hazardous chemicals based on a keyword search.
- Heat Capacity Conversion Factors Select units to convert from and to.
- Heat Exchanger Inlet/Outlet Temperature Prediction This procedure predicts the thermal behavior of a single heat exchanger or a bank of identical heat exchangers.
- Heat Exchanger Log Mean Temperature Difference This procedure calculates the Log Mean Temperature Difference (LMTD) of a heat exchanger in parallel or counter-current flow.
- Heat Exchanger Shell Side Pressure Drop This procedure calculates the shell side pressure drop of a heat exchanger for both laminar and turbulent flows.
- Heat Exchanger True Temperature Difference This procedure calculates the corrected Log Mean Temperature Difference (LMTD) of a single heat exchanger or a bank of identical heat exchangers connected in series.
- Heat Exchanger Tube Side Pressure Drop This procedure calculates the tube side pressure drop of a heat exchanger for both laminar and turbulent flows.
- Heat Flux Conversion Factors Select units to convert from and to.
- Heat of Combustion of Fuel Gas For a wide variety of fuels.
- Heat of Combustion of Fuel Oil This procedure calculates the heat of combustion of a petroleum or synthetic liquid fuel.
- Heat Tracing System Design Helpful calculator for basic freeze protection and process maintenance heat tracing applications.
- Heat Transfer Coefficient Conversion Factors Select units to convert from and to.
- Heat Transfer Factor Heat transfer factor is used in heat transfer in general and free and forced convection calculations in particular.
- Heat Treating Glossary This glossary currently contains more than 1000 metallurgical terms.
- HRSG Temperature Profile Calculator Program evaluates the gas/steam temperature profiles of single pressure HRSGs in the design mode only.

**I **

- Inductance Converter Convert to and from henry and derivatives, emu, and esu units.
- Inspection Penetrant Glossary By the American Gas & Chemical Co. Ltd.
- Insulating Products Search Engine NIST Heat Transmission Properties of Insulating and Building Materials.
- Insulation Chart Waste of fuel per year by heat loss from 1 foot of pipe (Steam at 100 PSI / Ambient Temp. 60° F.)
- Interactive Unit Equivalency Converter This utility allows you to convert from one engineering scale to another.
- Interactive Unit Equivalency Table Generator This utility allows you to generate an equivalency table from any engineering unit (milliAmps, for example) to any other.
- Inter-Conversion of Oil Distillation Enter percentage distilled and temperature for conversion to selected units.
- International Thermocouple Color Codes For thermocouple and extension grade wires.
- Internet Glossary of Pumps By the Animated Software Company.

**JKL**

- Language Converter Translates from German, Italian, Spanish, Russian, German, Portuguese, and French to English.
- Language Translator Translate English language web pages or text to Spanish, Portuguese, French, German, or Italian.
- Leak-Testing Glossary By the American Gas & Chemical Co. Ltd.
- Loan Calculator For a given amount, find the monthly payment, interest rate, or number of payments.
- Low Alloy Steels Database This database allows you to check the resistance of various low alloy steels to SCC in various environments.

**M**

- Materials and Corrosion Database Database allows you to check the resistance of a specified material in a specified environment.
- MatWeb Materials Information Resource A searchable materials information database covering 21,580 materials including metals, plastics, ceramics, and composites.
- Metal Hardness Reference Tables Various conversion tables of Rockwell and Brinell hardnesses.
- Metal Specifications Cross Reference Utility Select a specification originator, and the specs you want to review.
- Metal Temperature by Color Table of colors and corresponding temperatures.
- Metal Weight Calculator Enter size and metal type to calculate the weight of many metals.

**O**

- IST Thermocouple Database NIST reference functions and tables of thermocouple electromotive force (emf) versus temperature have been adopted as standards by the ASTM and the IEC.
- Nitrogen Loss Chart Nitrogen leaks cost approximately 10 times more than compressed air leaks. A chart indicating the high cost of N2 leaks.
- Non-Metric “Adding Machine” Adds Feet & Inches, Pounds & Ounces, Quarts & Cups, etc.
- NPT Tap Size Chart Recommended drill sizes for National Pipe Threads.
- Ohm’s Law Calculator Enter two variables to calculate the others.
- On-line Corrosion Problem Solver Provides assistance in the identification of the root cause of common corrosion problems through information obtained from simple visual examination of the corroding components or equipment.
- Optimum Dimensions of a Vessel This procedure calculates the optimum dimensions of a cylindrical pressure vessel with a known volume.
- Organic Compounds Database Provides physical data on a large number of organic compounds, including molecular weight, melting point, boiling point, index of refraction and UV absorption peaks.
- O-Ring Data Page Gives all of the relevant data for standard O ring sizes: OD/ID/cross-section/volume/metric for AS-568A uniform dash numbers
- Oval Duct Differential Pressure Calculator You input the length of the major and minor axes of the duct in inches, and the flow rate through the duct in cubic feet per minute.
- Oval Duct Flow Rate Calculator You input the length of the major and minor axes of the duct in inches, and the differential pressure across the duct in WC.
- Overall Heat Transfer Coefficient This procedure calculates the overall heat transfer coefficient of a heat exchanger.

**P**

- Petroleum Encyclopedia Published by Exxon.
- Physical Constants Look up the values of commonly used physical constants.
- Pipe Pressure Loss Calculator Wall drag and changes in height lead to pressure drops in pipe fluid flow. Calculates the pressure drop and flowrates in a section of uniform pipe.
- Pipe Properties This converter provides easy access to standard pipe properties and characteristics.
- Pipe Specifications Get the specs on virtually any standard size of pipe.
- Plane Strain Transform Calculator Given the strains at a space point in the body, this calculator computes the strains of the same space point in a rotated coordinate system.
- Plane Stress Transform Calculator Given the stresses at a space point in the body, this calculator computes the stresses of the same space point in a rotated coordinate system.
- Pocket Computer for Physics Use a java-enabled browser to take advantage of this physics calculator.
- Power Calculator These calculators will assist you in determining what size generator you may require or how to convert one unit of electricity to another.
- Pressure Conversion Utility Convert pressures from a wide range of units.
- Pressure Drop in Steam Line Calculator Input variables to calculate the pressure drop in a given system.
- Psychrometric Calculator Input what you know about a given psychrometric state and let the program determine the rest.
- Pythagorean Theorem Calculator Geometry calculator based on the Pythagorean Theorem.

**Q**

- Quadratic Equation Calculator Algebra calculator for quadratic equations.

**R**

- Radial O-Ring Calculator This calculator outputs the O-Ring inner diameter and the range of O-Ring cross-section diameters that will meet user prescribed limits on groove and bore diameters and O-Ring compression.
- Radioactivity Unit Converter Convert various units of radioactive measurement.
- RadioCalc Scientific calculator and universal converter for radio communication and electromagnetic compatibility (EMC).
- Reciprocating Compressor Sizing This procedure determines the number of compression stages, discharge temperature, head and both gas and brake horsepower required per stage for a reciprocating compressor.
- Rectangle Duct Differential Pressure Calculator You input the length of the two sides of the duct in inches, and the flow rate through the duct in cubic feet per minute.
- Rectangle Duct Flow Rate Calculator You input the length of the two sides of the duct in inches, and the differential pressure across the duct in WC.
- Research-It! General information search engine interface of many useful resources.
- Resistor Color Codes Table of colors, 1st and 2nd significant figures, multipliers, and tolerances.
- Reynolds Number Reynolds number is used in momentum, heat, and mass transfer to account for dynamic similarity.
- Reynolds Number Calculator This calculator computes the Reynolds Number given the flow characteristics asked for. It outputs the flow type you can expect (laminar, transitional, or turbulent) based on the Reynolds Number result.
- Right Triangle Calculator Any right triangle can be solved for all sides and angles if you just know two sides or one angle and one side.

**S**

- Salary Calculator You make your location choices from pull-down menus, then see how much money you’d need to earn to maintain the same cost-of-living level if you were to relocate to your chosen destination.
- Saturated Steam Table Condensed table of the thermodynamic properties of saturated steam.
- Saturated Steam Tables Calculator is used to compute the thermodynamic properties of saturated steam. This calculator uses steam properties from the 1967 ASME Steam Tables
- Scientific Calculator This is a simple but fairly general numeric expression evaluator, with a large number of built-in transcendental functions. It requires a Web browser that supports JavaScript.
- Screw Data Page Give all of the relevant data for sockethead capscrews, panhead machine screws and hexhead capscrews. Simulates the TAD-type slide-card.
- Search for an Individual ASTM Standard Search utility to find the ASTM standard by designation or listing.
- Shell Side Heat Transfer Coefficient This procedure calculates the shell side heat transfer coefficient of a heat exchanger for both laminar and turbulent flows.
- Single Phase Pressure Drop in Down Flow Fixed-Bed Reactors This Procedure utilizes the Ergun equation to calculate the pressure drop in down flow fixed-bed reactors. It applies equally well to gases and liquids.
- Single Phase Pressure Drop in Piping The pressure drop calculation presented here applies to Newtonian fluids which are incompressible and single phase in isothermal and steady-state flow situations.
- Solving for 3 Unknowns Algebra calculator for solving 3 unknowns.
- Solving for Two Unknowns Algebra calculator for when you have 2 unknowns.
- Sonic Velocity in a Gas This procedure calculates the sonic velocity in an ideal gas.
- Specific Heat Converter Convert to and from all standard units.
- Square Duct Differential Pressure Calculator You input the length of a side of the duct in inches, and the flow rate through the duct in cubic feet per minute.
- Square Duct Flow Rate Calculator You input the length of a side of the duct in inches, and the differential pressure across the duct in WC.
- Standard Atmosphere Computations Uses JavaScript to compute properties related to the 1976 standard atmosphere up to 230,000 ft.
- Standard Sieve Sizes Cross reference of Mesh Size (microns), TYLER, ASTM-E11, BS-410, and DIN-4188.
- Standard Tap Size Chart Gives the recommended drill size for American standard and ISO metric threads.
- Standard Temperature and Pressure Calculator Gas volumes are compared at a Standard Temperature of 273.15 Degrees Kelvin and a Pressure of 760 torr.
- Steam Loss Chart Steam flow through orifices discharging to atmosphere.
- Steam Trap Table Types, operating characteristics, and performance in particular applications.
- Steam Turbine Calculations Input process variables to calculate exit steam quality, rate, etc.
- Steam Usage Animation Shows how steam is used in a cogeneration facility, baghouse, etc.
- Steel Industry Glossary Comprehensive glossary published by Weirton Steel.
- Surface Roughness A chart showing what surface roughness ranges are typical for a number of fabrication processes.

**T**

- Table of Pipe Taper and Straight Thread Dimensions National Pipe Taper and Straight Thread Dimensions.
- Tank Volume Calculate the volume of liquid in a cylindrical tank. Orient the tank either vertically or horizontally.
- TEMA Heat Exchanger Designations Enter designation for front end stationary head type, shell type, and rear end head type for a picture of the configuration.
- Temperature Controller Simulation Enter various parameters and graph the results.
- Temperature Sensor Comparison Guide Table comparing temperature sensor attributes of thermocouples, RTDs, and thermistors.
- Terminal Velocity of a Rigid Particle This procedure calculates the terminal velocity of a single rigid particle falling in a Newtonian fluid under the influence of gravity and is applicable to the laminar, transitional, and turbulent flow regimes.
- The Directory of Online Statistics Sources This directory lists online statistics sources, by subject, for quick reference.
- The Periodic Table of Elements Detailed information for all elements, physical properties, chemical and structural properties, and other data.
- The Phase Diagram Web A free service of the Georgia Tech Joint Student Chapter of ASM/TMS showing binary elemental phase diagrams and links to prediction software and other related sites.
- Thermal Conductivity Converter Thermal conductivity conversion factors.
- Thermal Efficiency of Gas Fired Heaters This procedure calculates the thermal efficiency of a gas fired process heater and is based on API recommended practice 532.
- Thermal Efficiency of Oil Fired Heaters This procedure calculates the thermal efficiency of an oil fired process heater and is based on API recommended practice 532.
- Thermal Expansion (Linear) Conversion Factors Select units to convert from and to.
- Thermal Expansion (Volume) Conversion Factors Select units to convert from and to.
- Thermal Spray Technology Glossary A mixture of generic and popular terminology has been adopted by the thermal spraying industry.
- Time Zone Converter Find out the time anywhere in the world.
- Titanium-Zirconium Alloys Database This database allows you to check the resistance of various titanium-zirconium alloys to SCC in various environments.
- Tube Properties This converter provides easy access to standard tube properties and characteristics.
- Tube Side Heat Transfer Coefficient This procedure calculates the tube side heat transfer coefficient of a heat exchanger for both laminar and turbulent flows.
- Two Phase Flow Regime Determination The two phase flow regime determination procedure presented here applies to steady-state, isothermal two phase pipe flow of incompressible Newtonian fluids.
- Two Phase Horizontal Flow Regime Map For use in developing plant piping systems.
- Two Phase Pressure Drop in Piping The frictional pressure drop calculation presented here applies to steady-state, isothermal two phase pipe flow of incompressible Newtonian fluids.
- Two Phase Vertical Flow Regime Map For use in developing plant piping systems.
- Typical Heat Exchanger Fouling Resistances For refining applications, natural gas processing, chemical processing, industrial fluids, and cooling water.
- Typical Overall Heat Transfer Coefficients For alkylation, amine treating, catalytic cracking, crude distillation, hydrodesulfurization, light ends processing, lube & wax processing, naphtha hydrotreating & reforming, and thermal cracking.

**U**

- Ultimate Ellipse Calculator Geometry calculator for elipses.
- Ultimate Triangle Calculator This solves for any type of triangle, and calculates the area as well.
- Ultra Converter 1 Converts Distance, Area, Volume, Mass and Time.
- Ultra Converter 2 Converts Velocity, Force, Pressure, Energy and Power.
- Unit Conversion Calculator Featuring more than 800 units in our database (and growing), we give the unit definition and SI-dimensions in addition to converting from one unit to other units in the same family.
- Unit Conversions Over 40 conversions, including flow rates, heat flux, viscosity, latent heat, specific heat, and more.
- Unit Converters Wide variety of engineering unit conversion calculators.

**V**

- Vector Calculator This is a simple Java applet intended to give students a “feel” for vectors in two dimensions. Specifically, it covers components, magnitude and direction, and vector addition.
- Venturi Flowmeter Calculator A fluid passing though smoothly varying constrictions experience changes in velocity and pressure. These changes can be used to measure the flow rate of the fluid.
- Viscosity Converter Viscosity (absolute) factor converter.

**W**

- Weight Calculator Enter a material, density, shape, size, and quantity. The program calculates the weight in kilograms and pounds.
- Welding Dictionary Published by Miller Electric.
- Welding Terminology As defined in the Hobart Institute of Welding Technology Pocket Welding Guide.
- Wire and Sheet Metal Gauge Equivalents Gives the decimal value for standard sheet and wire gages. Now gives values for SWG, AWG, BWG and Manufacturer’s standard.
- Wrought Stainless Steels Database This database allows you to check the resistance of various wrought stainless steels to SCC in various environments.

**XYZ**

** **