The Engineering ToolBox

Free tools and information for engineering and design of technical applications.

Popular Documents

Water Density, Specific Weight and Thermal Expansion Coefficients - Temperature and Pressure Dependence

Data on the density and specific weight of water across various temperatures and pressures. Useful for engineering, fluid dynamics, and HVAC calculations.

Steel Pipes Expansion Loops - Design and Calculation

Steel pipe expansion loops and their importance in managing thermal expansion, and how to design and size them effectively. Key considerations, calculations, and installation tips to prevent stress and damage in piping systems.

Air Properties - Density, Viscosity, Heat Capacity, Thermal Conductivity, and more

Thermal properties of air, including density, viscosity, thermal conductivity, specific heat and more at different temperatures and pressures. Comprehensive reference with formulas, tables, and charts to support engineering calculations.

Hot Air Balloon Lifting Force Calculator

Calculate the lifting force of a hot air balloon based on temperature difference, air density, and balloon volume. Includes formulas, explanations, and practical applications for aeronautics and physics.

Air - Psychrometric Chart for Standard Atmospheric Conditions - Imperial Units

Psychrometric chart to analyze air properties, including temperature, humidity, enthalpy, and dew point at barometric pressure 29.921 inches of Mercury and temperature ranging 20^oF to 120^oF.

Miter Saw Angle Protractor – Quick & Accurate Angle Measurements

Use a miter saw angle protractor for precise angle calculations in woodworking and construction. Measure and cut perfect angles effortlessly.

Thermal Conductivity of Common Materials - Solids, Liquids and Gases

Thermal conductivity of various common materials, including metals, gases, and building materials. Essential data for engineers, architects, and designers working with heat transfer and insulation.

Dynamic, Absolute, and Kinematic Viscosity – Definitions & Conversions

The differences between dynamic, absolute, and kinematic viscosity - a fluids resistance to flow - with definitions, unit conversions, and practical applications for engineers and scientists.

AWG Wire Gauge Chart & Table – American Wire Gauge (AWG) Standards

The AWG (American Wire Gauge) wire size chart with detailed specifications on wire diameter, resistance, and ampacity. Find conversions between AWG sizes and metric units for electrical and engineering applications.

Hot Water Heating System Online Design Application

Free online design tool for designing hot water heating systems - metric units.

Wrench Size Conversion Chart – Metric (mm) to SAE (Inches)

Convert between metric and SAE (inch) wrench sizes with this comprehensive comparison chart. Find the closest equivalent sizes for your tools, whether working with US standard (SAE) or metric fasteners.

New vs. Old Car Costs: A Comprehensive Cost Comparison

Compare the total cost of owning a new car versus an old car, including purchase price, maintenance, fuel efficiency, insurance, and depreciation. Use our detailed breakdown to make an informed financial decision before buying the next vehicle.

Topics

• Acoustics

  Room acoustics and acoustic properties. decibel A, B and C calculations. Noise Rating (NR) curves. Sound transmission through walls. Calculate sound pressure, sound intensity and sound attenuation.

• Air Psychrometrics

  Moist and humid air calculations. Psychrometric charts and Mollier diagrams. Air-condition systems temperatures, absolute and relative humidities and moisture content in air.

• Basics

  Basic engineering data. SI-system, unit converters, physical constants, drawing scales and more.

• Combustion

  Combustion processes and their efficiency. Boiler house and chimney topics. Properties of fuels like oil, gas, coal and wood and more. Safety valves and tanks.

• Drawing Tools

  2D and 3D engineering drawing tools.

• Dynamics

  Motion of bodies and the action of forces in producing or changing their motion - velocity and acceleration, forces and torque.

• Economics

  Engineering economics - cash flow diagrams, present value, discount rates, internal rates of return - IRR, income taxes, inflation.

• Electrical

  Electrical engineering with units, amps and electrical wiring. Wire gauges, electrical formulas, motors and more.

• Environment

  Climate, meteorology, solar, wind, emissions 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

  Properties of air, LNG, LPG and other common gases. Pipeline capacities and sizing of relief valves.

• HVAC Systems

  Design and sizing of Heating, Ventilation and Air Conditioning systems.

• Hydraulics and Pneumatics

  Hydraulic and pneumatic systems - fluids, forces, pumps and pistons.

• Insulation

  Calculate heat transfer and heat loss from buildings and technical applications. Heat transfer coefficients and insulation methods available for reduction of energy consumption.

• Material Properties

  Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.

• Mathematics

  Mathematical rules and laws - numbers, areas, volumes, exponents, trigonometric functions and more.

• Mechanics

  The relationships between forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more.

• Miscellaneous

  Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.

• Physiology

  Human physiology vs. air quality, comfort temperatures, activity and metabolic rates. Health effects of gases adn polutions like carbon monoxide and more.

• Piping Systems

  Calculate dimensions of pipes and tubes. Pressure drop calculations and head loss charts. Use of different piping materials. Insulation of pipes and tubes and heat loss diagrams.

• Process Control Systems

  Instrumentation, design and documentation of process control systems.

• Pumps

  Design of pumping systems and pipelines. With centrifugal pumps, displacement pumps, cavitation, fluid 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.

• Statics

  Forces acting on bodies at rest under equilibrium conditions - loads, forces and torque, beams and columns.

• Steam and Condensate

  Design of steam & condensate systems with properties, capacities, sizing of pipe lines, system configuration and more.

• Thermodynamics

  Work, heat and energy systems.

• Water Systems

  Design of hot and cold water service and utility systems with properties, capacities, sizing of pipe lines and more.