Solve kinetic energy, mass, or speed with unit conversion.

Calculate LC resonant frequency and reactance from inductance and capacitance.

Find the series resistor and power dissipation for an LED circuit.

Convert common length and distance units.

Sort and clean one-item-per-line text without uploading it.

Solve one-variable linear equations and two-variable systems.

Shuffle lists or pick random entries locally in your browser.

Estimate monthly payment, total cost, and interest for a fixed-payment loan.

Solve average power, work, or time with P = W/t.

Solve momentum, mass, or velocity with unit conversion.

Convert integers between binary, octal, decimal, and hexadecimal.

Solve voltage, current, resistance, and electrical power.

Generate configurable random passwords locally in your browser.

Find percentages, percent change, increases, and decreases.

Calculate exact nPr and nCr values and understand when order matters.

Convert W, kW, MW, hp, PS, BTU/h, and kcal/h.

Convert Pa, kPa, MPa, bar, psi, atm, mmHg, and Torr.

Find the prime factors of a whole number.

Calculate basic, combined, conditional, and complement probabilities.

Calculate ideal projectile range, height, and flight time.

Solve quadratic equations and inspect roots, discriminant, and vertex.

Build encoded URL query strings from key-value parameters.

Generate random integers from a custom inclusive range.

Simplify ratios and solve proportions with a missing value.