engineering Calculators
Last updated: May 2026
Beam Deflection Calculator
Calculate the maximum deflection of a simply supported beam under a point load, uniformly distributed load (UDL), or end load using standard Euler-Bernoulli beam theory.
Ohm's Law Calculator
Calculate electrical resistance from voltage and current using Ohm's Law: R = V / I.
Pipe Pressure Drop Calculator
Calculate frictional pressure drop in a pipe using the Darcy-Weisbach equation, given friction factor, length, diameter, and fluid velocity.
Convective Heat Transfer Calculator
Calculate convective heat transfer rate from a solid surface to a flowing fluid (or vice versa) using Newton's law of cooling.
Reynolds Number Calculator
Calculate the Reynolds number — the dimensionless ratio of inertial to viscous forces in a flowing fluid — to determine whether flow is laminar, transitional, or turbulent.
Column Buckling Calculator
Determines the critical axial load at which a slender column will buckle, using Euler's formula.
Gear Ratio & Speed Calculator
Calculates the output speed of a two-gear meshing pair given the driver and driven tooth counts and the input speed.
Stress and Strain Calculator
Converts an applied force and cross-sectional area into mechanical stress in MPa.
Power Transmission Calculator
Converts torque (N·m) and rotational speed (rpm) into mechanical power in kilowatts.
Thermal Expansion Calculator
Calculates how much a material elongates when its temperature changes, using the linear thermal expansion formula.
Concrete Mix Design Calculator
Estimates the total cement mass required for a concrete pour based on volume and target strength.
Pressure Vessel Wall Thickness Calculator
Calculate the minimum required wall thickness of a cylindrical pressure vessel using ASME pressure vessel code equations.
HVAC Duct Sizing Calculator
Calculate the required diameter or dimensions of HVAC ducts based on air flow rate and design velocity.
Transformer Losses Calculator
Calculate the operating efficiency of a power transformer at any load factor, accounting for both iron (no-load) and copper (load-dependent) losses.
Pipe Flow Friction Loss Calculator
Calculates pressure drop due to friction in straight pipe runs using the Darcy-Weisbach equation.
Steel Column Buckling Calculator
Computes the Euler critical buckling load for steel columns under axial compression.
Heat Exchanger Effectiveness Calculator
Calculates heat exchanger effectiveness using the NTU-effectiveness (ε-NTU) method for counter-flow and parallel-flow configurations.
Pump Head Calculator
Determine the total dynamic head and shaft power needed to move fluid through a piping system.
Pipe Flow Pressure Drop Calculator
Calculate the pressure drop along a pipe section using the Darcy-Weisbach equation.
Gear Ratio & Torque Calculator
Compute the output torque, gear ratio, and mechanical advantage of a gear pair given tooth counts, input torque, and efficiency.
Thermal Stress & Expansion Calculator
Calculate how much a material expands or the thermal stress it develops when temperature changes, depending on whether it is free to move or constrained.
Ohm's Law & Power Calculator
Instantly compute voltage, current, resistance, or power in any DC circuit by entering two known quantities.
Pipe Flow Rate Calculator
Determine volumetric flow rate through a pipe using the Hazen-Williams equation for water distribution systems.
Heat Conduction Calculator
Compute the steady-state heat flow rate through a flat material layer using Fourier's Law.
Gear Ratio & Speed Calculator
Determine the gear ratio, output shaft speed, and torque multiplication of any meshing gear pair.
Pump Power & Efficiency Calculator
Find the shaft power (kW) needed to drive a pump given flow rate, head, fluid density, and combined pump-motor efficiency.
Pump Power Calculator
Calculate the shaft power a pump must deliver to move fluid against a given head at a specified flow rate and efficiency.
Pipe Pressure Drop Calculator
Compute the frictional pressure drop along a straight pipe section using the Darcy-Weisbach equation.
Reynolds Number Calculator
Determines whether fluid flow inside a pipe is laminar or turbulent by computing the dimensionless Reynolds number.
HVAC Heat Load Calculator
Estimates the heating or cooling load for a room or building in BTU/hr based on floor area, ceiling height, insulation quality, temperature difference, and window area.
Pipe Flow & Pressure Drop Calculator
Calculates pressure drop along a pipe using the Hazen-Williams equation, accounting for pipe material, flow rate, diameter, length, and elevation change.
Electrical Wire Sizing Calculator
Determines the minimum wire cross-sectional area needed to keep voltage drop within safe limits for a given load current and run length.
Pump Head & Power Calculator
Calculates the brake horsepower a pump motor must deliver to move a fluid at a given flow rate against static head and pipe friction losses.
Soil Bearing Capacity Calculator
Estimates the allowable load a shallow foundation can safely impose on soil using a simplified Terzaghi bearing capacity approach.