EngineeringTools

Free online engineering calculator

Free online engineering calculators for unit conversion, mechanics, circuits, and fluid dynamics. Featuring our popular engine displacement and cylinder volume calculators.

Unit Converter
Convert between various engineering units including length, mass, pressure, and temperature.
Mechanics of Materials
Calculate beam deflection, stress, and strain for common engineering scenarios.
Material Properties
Searchable database of common engineering materials and their physical properties.
Heat Transfer
Calculate heat flow via conduction, convection, and radiation with our specialized tools.
Engine Displacement
Use our engine displacement calculator to find engine size in CC, Liters, or Cubic Inches.
Cylinder Volume
Perform the calculation volume of cylinder based on radius and height with ease.
Circuit Design
Solve Ohm's law, power equations, and analyze series/parallel circuits.
Fluid Dynamics
Calculate Reynolds number, flow rates, and pressure drops in pipes.
Pythagorean Theorem Calculator
Calculate the unknown side of a right triangle using the Pythagorean theorem with step-by-step solutions.
Stone & Gravel Calculator
Calculate exact cubic yards needed and convert to tons based on stone type for landscaping and driveways.
Concrete Calculator
Estimate concrete volume in cubic yards and calculate the number of bags needed for slabs, footings, and columns.
Roofing Shingle Calculator
Estimate total roof surface area, roofing squares, and exact number of bundles needed based on roof pitch.

Accuracy & Reliability

All engineering calculations provided by our tools are based on peer-reviewed formulas and standard industry handbooks. Our engineering calculators are designed to assist professionals and students in verifying their work with confidence. We prioritize precision and transparency in every calculation we offer.

Frequently Asked Questions