Calculators

Solve phase-change energy with Q = mL.

Calculate LC resonant frequency and reactance from inductance and capacitance.

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

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

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

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

Solve molarity, moles, volume, or solute mass using M = n/V.

Calculate moles, mass, molar mass, or particle count.

Calculate rotational inertia for common uniform shapes and axes.

Solve momentum, mass, or velocity with unit conversion.

Solve voltage, current, resistance, and electrical power.

Calculate ideal op-amp gain, output voltage, or feedback resistance.

Estimate ideal parallel-plate capacitance from geometry and dielectric.

Estimate when cumulative cash inflows recover an initial outlay.

Find percent error, compare measurements, or solve for a measured value.

Find percentages, percent change, increases, and decreases.

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

Find the prime factors of a whole number.

Calculate basic, combined, conditional, and complement probabilities.

Calculate profit margin, markup, and target-margin selling price.

Calculate ideal projectile range, height, and flight time.

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

Simplify ratios and solve proportions with a missing value.

Calculate RC filter cutoff frequency or solve R or C.