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A

4 Unknown Calculator

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.

Aluminium Alloys Database
This database allows you to check the resistance of various aluminium 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 fingerspelling dicionary, ASL fingerspelling 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 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.


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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 compreesor.

Ceramic Materials Data
Examples of materials data for ceramic materials.

Charles' Law Calculator
Charles' Law states that the volume of a fixed massof 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.

Chemicool
Chemicool Chemistry Periodic table (periodic chart) of the elements. Information about hydrogen, oxygen, silver, carbon, aluminium...plus Forum, Dictionary and Tools.

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 coeficients 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, other little used facts.

Crude Oil & Products
Volume, weight, and flowrate 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.
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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 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, 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.


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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
Foilcenter 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 frquencies, 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.



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H

Half-Life Calculator
Calculations involving the exponential deacy 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 comomonly 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.

JK

L

Language Converter
Translates from German, Italian, Spanish, Russian, German, Portugese, 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.

Minerals, Mining, and Metallurgy
Browse questions and answers about Minerals, Mining, and Metallurgy at Smart QandA. Every answer is verified using trusted research and reference information at Encyclopedia.com!

Mortgage, Loans and Financial Calculators
These financial calculators can help figure calculations on mortgages, car loans, home equity loans, CDs, savings, credit cards, student loans and more. (US based)

O

NIST 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 cylinderical 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 oring 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.


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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.

Power Calculator
These calculators will assit 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 sidesof 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 sidesof 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.

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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 flowrate 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

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