The Engineering ToolBox
Free tools and information for engineering and design of technical applications
Steel Pipes - Calculate Thermal Expansion Loops
Calculating and sizing steel pipe thermal expansion loops.
Air - Thermophysical Properties
Thermal properties of air at different temperatures - density, viscosity, critical temperature and pressure, triple point, enthalpi and entropi, thermal conductivity and diffusivity and more.
Water Supply Systems - Online Design Application
Free online tool for designing water supply systems in buildings.
Thermal Expansion - Linear Expansion Coefficients
Linear temperature expansion coefficients for common materials like aluminum, copper, glass, iron and many more.
Hot Air Balloons - Calculate Lifting Weights
Calculate hot air ballons lifting forces.
Air - Psychrometric Chart for Standard Atmospheric Conditions - Imperial Units
Psychrometric chart for air at barometric pressure 29.921 inches of Mercury and temperature ranging 20oF to 120oF.
UTM to Latitude and Longitude Converter
Free online UTM to Latitude and Longitude coordinates converter.
Water - Thermophysical Properties
Thermal properties of water at different temperatures like density, freezing temperature, boiling temperature, latent heat of melting, latent heat of evaporation, critical temperature and more.
Radians vs. Degrees
Radian is the SI unit of angle. Convert between degrees and radians. Calculate angular velocity.
Miter Saw - Calculate Sawing Angle
Calculate miter saw protractor angles for skirting and decorative mouldings work.
Friction - Friction Coefficients and Calculator
Friction theory with calculator and friction coefficients for combinations of materials like ice, aluminum, steel, graphite and many more.
Young's Modulus, Tensile Strength and Yield Strength Values for some Materials
Young's Modulus (or Tensile Modulus alt. Modulus of Elasticity) and Ultimate Tensile Strength and Yield Strength for materials like steel, glass, wood and many more.
Solids, Liquids and Gases - Thermal Conductivities
Thermal conductivity coefficients for insulation materials, aluminum, asphalt, brass, copper, steel, gases and more.
Water - Density, Specific Weight and Thermal Expansion Coefficients
Definitions, online calculator and figures and tables with water properties like density, specific weight and thermal expansion coefficient of liquid water at temperatures ranging 0 to 360°C (32 to 680°F).
Numbers - Square, Cube, Square Root and Cubic Root Calculator
Calculate square, cube, square root and cubic root. Values tabulated for numbers ranging 1 to 100.
W-Beams - American Wide Flange Beams
Dimensions of American Wide Flange Beams ASTM A6 (or W-Beams) - Imperial units.
Viscosity - Absolute (Dynamic) vs. Kinematic
Vicosity is a fluid's resistance to flow and can be valued as dynamic (absolute) or kinematic.
AWG - American Wire Gauge Converting Chart
American Wire Gauge (AWG) vs. cross sectional area converter.
Density vs. Specific Weight and Specific Gravity
An introduction to density, specific weight and specific gravity.
Hot Water Heating Systems - Online Design Application
Free online design tool for designing hot water heating systems - metric units.
Water - Dynamic (Absolute) and Kinematic Viscosity vs. Temperature and Pressure
Free online calculator - figures and tables with viscosity of water at temperatures ranging 0 to 360°C (32 to 675°F) - Imperial and SI Units.
Flanges - ASME/ANSI B16.5 Flanges and Bolt Dimensions - Class 150 to 2500
Diameters and bolt circles for standard ASME B16.5 flanges - 1/4 to 24 inches - Class 150 to 2500.
Inches vs. mm - Conversion Chart
Convert fractional and/or decimal inches to metric mm - and vice versa.
Wrench Spanners - Inches vs. mm
Convert between US Inches and metric mm wrench and spanner sizes.
Area Moment of Inertia - Typical Cross Sections I
Typical cross sections and their Area Moment of Inertia.
Dry Air - Thermodynamic and Physical Properties
Thermodynamic properties of dry air - specific heat, ratio of specific heats, dynamic viscosity, thermal conductivity, Prandtl number, density and kinematic viscosity at temperatures ranging 175 - 1900 K.
Cars - New vs. Old Car Cost Calculator
Calculate and compare the costs between owning a new vs. an old car.
Room acoustics and acoustic properties, decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation.
• Air Psychrometrics
Moist and humid air - psychrometric charts, Mollier diagrams, air-condition temperatures and absolute and relative humidity and moisture content.
The SI-system, unit converters, physical constants, drawing scales and more.
Boiler house topics, fuels like oil, gas, coal, wood - chimneys, safety valves, tanks - combustion efficiency.
• Drawing Tools
2D and 3D engineering drawing tools.
Motion - velocity and acceleration, forces and torque.
Engineering economics - cash flow diagrams, present value, discount rates, internal rates of return - IRR, income taxes, inflation.
Electrical units, amps and electrical wiring, wire gauge and AWG, electrical formulas and motors.
Climate, meteorology, sun, wind and environmental related engineering resources.
• Fluid Mechanics
The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.
• Gases and Compressed Air
Air, LNG, LPG and other common gas properties, pipeline capacities, sizing of relief valves.
• HVAC Systems
Heating, ventilation and air conditioning systems - design and dimensions.
• Hydraulics and Pneumatics
Hydraulic and pneumatic systems - fluids, forces, pumps and pistons.
Heat transfer and heat loss from buildings and technical applications - heat transfer coefficients and insulation methods to reduce energy consumption.
• Material Properties
Material properties of gases, fluids and solids - densities, specific heats, viscosities and more.
Mathematical rules and laws - numbers, areas, volumes, exponents, trigonometric functions and more.
Forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more.
Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.
Human physiology, air quality and comfort temperatures, activity and metabolic rates, health effects of carbon monoxide and more.
• Piping Systems
Dimensions of pipes and tubes, materials and capacities, pressure drop calculations and charts, insulation and heat loss diagrams.
• Process Control
Instrumentation and process control systems - design and documentation.
Piping systems and pumps - centrifugal pumps, displacement pumps - cavitation, viscosity, head and pressure, power consumption and more.
• Sanitary Drainage Systems
The purpose of the sanitary drainage system is to remove effluent discharged from plumbing fixtures and other equipment.
• Standard Organizations
National and International organizations producing codes and standards - ANSI, ISO, DIN, BSi and more.
Loads - forces and torque, beams and columns.
• Steam and Condensate
Steam & condensate systems- properties, capacities, pipe sizing, systems configuration and more.
Work, heat and energy systems.
• Water Systems
Hot and cold water service systems - design properties, capacities, sizing and more.