Engineering Calculators

Ohm's Law Calculator

Find resistance and power from voltage and current using Ohm's Law — the single most foundational relationship in basic electrical circuit analysis.

Resistor Series/Parallel Calculator

Find the total resistance of two resistors in series or parallel — the two fundamental ways components combine in essentially every electrical circuit.

Kinetic Energy Calculator

Find the kinetic energy of a moving object from its mass and velocity — a relationship whose velocity-squared scaling explains why speed matters so much for collision severity.

Beam Deflection Calculator

Find the maximum deflection of a simply supported beam under a center point load — one of the most common checks in structural and mechanical design.

Three-Phase Power Calculator

Find real power delivered by a balanced three-phase electrical system — the standard configuration for higher-power industrial and commercial electrical loads.

Power Factor Calculator

Find the power factor of an electrical load from real and apparent power — a key efficiency metric for AC electrical systems, particularly relevant to commercial and industrial billing.

Bolt Torque Calculator

Estimate the tightening torque needed for a target bolt clamp force — the standard short-form relationship used across general mechanical fastening work.

Thermal Expansion Calculator

Find how much a material expands when heated, from its length and coefficient of thermal expansion — a key consideration for expansion joints in bridges, railways, and pipelines.

Fluid Flow Rate Calculator

Find the volumetric flow rate through a pipe from cross-sectional area and velocity — one of the most fundamental relationships in fluid mechanics and pipe sizing.

Gear Ratio Calculator

Find the gear ratio and output speed from two gears' tooth counts — the fundamental relationship governing how mechanical systems trade speed for torque.

Voltage Divider Calculator

Calculate the output voltage of a two-resistor voltage divider circuit — one of the most common and useful basic building blocks in electronics.

Horsepower to Watts Calculator

Convert between mechanical horsepower and watts — bridging the traditional imperial power unit with the SI standard used throughout modern science and engineering.

RC Charge Time Calculator

Find how long a resistor-capacitor circuit takes to charge to a given percentage — since a charging capacitor follows an exponential curve that mathematically never quite reaches 100%.

Force Calculator

Find force from mass and acceleration using Newton's second law — the foundational relationship connecting motion and the forces that cause it.

Reynolds Number Calculator

Find the Reynolds number for pipe flow to check whether it's laminar or turbulent — a single dimensionless number that predicts fundamentally different flow behavior.

Torque Calculator

Find torque from force and lever arm length — the rotational equivalent of force, and the basis for understanding leverage, gears, and rotating machinery.

Pressure Calculator

Find pressure from force and the area it's applied over — a relationship that explains everything from why snowshoes work to how hydraulic systems multiply force.

Capacitor Series/Parallel Calculator

Find the total capacitance of two capacitors in series or parallel — following a combination logic that runs exactly opposite to how resistors combine.

Inductor Energy Storage Calculator

Find the energy stored in an inductor's magnetic field — the electrical circuit analog to kinetic energy, following the same underlying mathematical structure.