Engineering calculators and tools
Engineering Calculators
Choose a calculator category, then browse focused tools for electrical, structural, fluids, thermodynamics, mechanical design, material properties, geometry, and technical math.
Calculator directory
Browse by engineering field
Electrical
Calculate voltage, current, resistance, power, frequency, wire sizing, filters, and common circuit relationships.
12 calculatorsFluid Dynamics
Analyze pipe flow, pressure loss, velocity, drag, pump head, open-channel flow, and hydraulic behavior.
11 calculatorsGeneral Tools
Use practical utility calculators for time, cost, grades, square footage, and everyday technical checks.
6 calculatorsGeometry
Calculate dimensions, areas, perimeters, volumes, surface areas, and section properties for engineering geometry.
12 calculatorsMaterial Properties
Evaluate density, modulus, strength, ductility, hardness, fracture toughness, and thermal material behavior.
12 calculatorsMathematics
Use practical math tools for fractions, ratios, statistics, matrices, percentages, and engineering calculations.
8 calculatorsMechanical
Calculate torque, power, gears, springs, pulley ratios, belts, propeller thrust, and mechanical relationships.
14 calculatorsStructural
Analyze loads, bending, buckling, stress, strain, trusses, welds, failure criteria, and structural design checks.
12 calculatorsThermodynamics
Calculate heat transfer, gas laws, entropy, enthalpy, humidity, engine efficiency, and thermodynamic relationships.
About EngLab calculators
Free Engineering Calculators for Design, Study, and Technical Checks
Use EngLab's engineering calculators to solve common problems in electrical circuits, fluid mechanics, structural analysis, thermodynamics, mechanical design, material properties, geometry, and technical mathematics. Each calculator is built around practical engineering formulas, clear input fields, and quick results for early-stage design checks, coursework, estimating, troubleshooting, and professional reference.
Browse by engineering field to find calculators for voltage drop, Ohm's law, beam bending, pipe flow, Reynolds number, heat transfer, torque, gear ratios, density, elastic modulus, stress, strain, area, volume, statistics, and more. Results should always be reviewed against project requirements, standards, manufacturer data, and qualified engineering judgement before final design use.