Civil
Beam Deflection
Calculate maximum deflection for simply-supported beams under uniform load. Instant results, se…
All Engineering Calculators
188 tools across 19 disciplines — free, transparent formulas, no sign-up.
By course:AP / IB PhysicsIntro ChemistryStatics & Mechanics of MaterialsCircuits IFluid MechanicsThermodynamics & Heat TransferSignals & Control SystemsStatistics & Data Analysis
Civil
Concrete Mix Design
Calculate concrete mix proportions using ACI 211.1. Outputs w/c ratio, cement, water, fine and …
Civil
Hazen-Williams Pipe Flow
Calculate pipe flow velocity and flow rate using the Hazen-Williams equation. Instant hydraulic…
Civil
Retaining Wall Stability
Check overturning and sliding stability of gravity retaining walls using Rankine earth pressure…
Civil
Footing Bearing Capacity
Calculate ultimate and allowable bearing capacity of shallow footings using Terzaghi's equation…
Civil
Storm Drain Sizing
Calculate required storm drain pipe diameter using Manning's equation. Returns minimum and nomi…
Mechanical
Belt Drive
Calculate V-belt or flat-belt drive length, velocity ratio, output speed, belt speed and wrap a…
Mechanical
Spring Rate
Calculate helical compression spring stiffness from wire diameter, coil diameter and active coi…
Mechanical
Shaft Stress Analysis
Calculate torsional and bending stresses in a solid circular shaft under combined loading. Retu…
Mechanical
Bearing Life (L10)
Calculate L10 rated life for rolling element bearings per ISO 281. Returns life in hours and ye…
Mechanical
Thermodynamic Cycles
Calculate Otto cycle thermal efficiency, net work output and heat rejection. Compare against Ca…
Mechanical
Mohr's Circle
Calculate principal stresses σ₁ and σ₂, maximum shear stress and principal plane orientation us…
Mechanical · Simulation
Stress Concentration Factor (Kt)
Compute theoretical stress concentration factor Kt for four configurations: plate with hole, pl…
Electrical
PCB Trace Width
Calculate minimum PCB trace width for a given current using IPC-2221A. Supports internal and ex…
Electrical
Power Factor Correction
Calculate capacitor bank size required to correct lagging power factor. Returns kVAR and µF nee…
Electrical
Series RLC Circuit
Calculate RLC circuit resonant frequency, impedance, Q-factor, bandwidth and phase angle for se…
Electrical
Thévenin / Norton Equivalent
Calculate load current, voltage, power and maximum power transfer using Thévenin's theorem. Inc…
Electrical · Simulation
DC Motor Torque-Speed Curve
DC shunt motor torque-speed characteristic and efficiency curve. Enter supply voltage, armature…
Structural
Section Modulus
Calculate elastic and plastic section modulus for a rectangular beam section. Returns bending s…
Structural
Column Buckling (Euler)
Calculate critical buckling load (Pcr) for slender columns using Euler's formula. Supports all …
Structural
Steel Beam Sizing
Calculate required section modulus for a simply-supported steel beam under uniform load. Return…
Structural
Pavement Thickness Design
Design flexible pavement layer thicknesses per AASHTO 1993 (structural number method) or CBR me…
Chemical
Darcy-Weisbach Pressure Drop
Calculate pipe friction pressure drop and head loss using the Darcy-Weisbach equation. Returns …
Chemical · Simulation
Binary Phase Diagram
Interactive binary phase diagram for isomorphous or simple eutectic systems. Enter melting poin…
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