All Tools

Calculate maximum deflection for simply-supported beams under uniform load. Instant results, se...

Calculate concrete mix proportions using ACI 211.1. Outputs w/c ratio, cement, water, fine and ...

Calculate pipe flow velocity and flow rate using the Hazen-Williams equation. Instant hydraulic...

Check overturning and sliding stability of gravity retaining walls using Rankine earth pressure...

Calculate ultimate and allowable bearing capacity of shallow footings using Terzaghi's equation...

Calculate required storm drain pipe diameter using Manning's equation. Returns minimum and nomi...

Calculate earthwork cut and fill volumes using the prismatoid formula from cross-section areas....

Calculate slope stability factor of safety using the infinite slope method. Enter cohesion, fri...

Calculate gear ratio, output speed and torque for a simple spur gear pair. Instant results with...

Calculate V-belt or flat-belt drive length, velocity ratio, output speed, belt speed and wrap a...

Calculate heat transfer rate through a flat wall using Fourier's Law. Returns heat flux and the...

Calculate helical compression spring stiffness from wire diameter, coil diameter and active coi...

Calculate torsional and bending stresses in a solid circular shaft under combined loading. Retu...

Calculate L10 rated life for rolling element bearings per ISO 281. Returns life in hours and ye...

Calculate linear thermal expansion of pipes, rods and structures. Enter coefficient of thermal ...

Calculate engine displacement in litres and cc, swept volume per cylinder, and compression rati...

Calculate flywheel stored kinetic energy in kJ and Wh, moment of inertia and rim speed from mas...

Calculate current, power and energy using Ohm's Law. Instant V=IR calculator with AI-explained ...

Calculate minimum PCB trace width for a given current using IPC-2221A. Supports internal and ex...

Calculate AWG wire diameter, cross-sectional area, resistance and NEC ampacity. Covers AWG 0–40...

Calculate output voltage, current and power dissipation for a two-resistor voltage divider. Ins...

Calculate RC circuit time constant, -3dB cutoff frequency and capacitor charge time. Returns τ,...

Calculate capacitor bank size required to correct lagging power factor. Returns kVAR and µF nee...

Calculate active power, reactive power, apparent power and phase angle for a balanced 3-phase A...

Calculate the correct current-limiting resistor for an LED. Enter supply voltage, LED forward v...

Estimate battery runtime in hours and days from capacity (mAh/Ah) and average discharge current...

Calculate transformer turns ratio, primary and secondary currents from voltages and apparent po...

Convert between milliwatts, watts, dBm and dBW. Essential for RF, audio, and telecommunications...

Calculate second moment of area (Ixx, Iyy) for rectangle, circle, hollow rectangle and hollow c...

Calculate elastic and plastic section modulus for a rectangular beam section. Returns bending s...

Calculate critical buckling load (Pcr) for slender columns using Euler's formula. Supports all ...

Calculate required section modulus for a simply-supported steel beam under uniform load. Return...

Calculate the Reynolds number and determine flow regime (laminar, transitional, turbulent) for ...

Calculate pipe friction pressure drop and head loss using the Darcy-Weisbach equation. Returns ...

Calculate centrifugal pump hydraulic power, shaft power and efficiency. Returns kW, horsepower ...

Calculate projectile range, maximum height, time of flight and trajectory from initial velocity...

Calculate the Schwarzschild radius (event horizon) of a black hole in km and m from its mass in...

Calculate the period and frequency of a simple pendulum from its length and gravitational accel...

Calculate neuron firing rate in Hz, mean ISI, and coefficient of variation from spike count and...

Estimate nerve conduction velocity from axon diameter using Hursh's rule for myelinated and emp...

Classify EEG signal frequency into delta, theta, alpha, beta, or gamma bands. Calculate SNR, pe...

Calculate exact dice roll probabilities for any number of dice and sides. Monte Carlo simulatio...

Solve any f(x)=0 equation numerically. Newton-Raphson with bisection fallback, full iteration h...