Engineering

26 tools · Circuits, beams, fluids, and civil calculators.

Ohm's Law Calculator

Solve V = IR for voltage, current, or resistance.

Power Calculator

Electrical power from P = VI, I²R, or V²/R.

Resistor Calculator

Series and parallel equivalent resistance.

Resistor Color Code

Decode 3–5 band resistor color codes to ohms.

Capacitor Calculator

Series/parallel capacitance and capacitive reactance.

Inductor Calculator

Series/parallel inductance and inductive reactance.

RC Time Constant Calculator

τ = RC plus charging and discharging voltages.

Voltage Divider Calculator

Output voltage from a resistive divider.

Current Divider Calculator

Branch currents for two parallel resistors.

Decibel Calculator

Power/voltage ratios, invert dB, and dBm.

Frequency Wavelength Calculator

Convert between frequency and wavelength.

Torque Calculator

Torque from force, lever arm, and angle.

Stress Calculator

Normal stress σ = F/A.

Strain Calculator

Engineering strain ε = ΔL/L₀.

Beam Calculator

Simply supported beam: max moment, shear, and deflection.

Reynolds Number Calculator

Reynolds number and laminar/turbulent regime.

Pressure Calculator

Pressure from force and area with kPa/bar.

Flow Rate Calculator

Volumetric flow from Q = Av or V/t.

Fluid Dynamics Calculator

Bernoulli pressure drop and drag force.

Concrete Volume Calculator

Slab/pour volume with waste factor.

Rebar Calculator

Steel rebar mass from diameter, length, and count.

Slope Calculator

Slope ratio, angle, and grade from rise and run.

Grade Calculator

Percent grade from rise and run.

Area Calculator

Rectangle, circle, triangle, and trapezoid area.

Volume Calculator

Box, cylinder, sphere, and cone volume.

Load Calculator

UDL, support reactions, and psf area loads.