Calculators

Every calculator shows its working, so you can check the method as well as the answer.

Find Q1, median, Q3 and IQR from a list of values or from histogram bins (grouped data), with every step shown.

Sample and population standard deviation, variance and mean, with the full sum-of-squares working.

Given the mean and standard deviation, find P(X < b), P(X > a) or P(a < X < b) with z-scores.

Exact distribution, mean and standard deviation for the sum of any number of fair dice.

Determinant with cofactor expansion, inverse, symmetric eigen-decomposition and singular values.

Turn minterms or a truth table into a minimal sum-of-products expression using Quine–McCluskey.

Phase angle, impedance and power factor for series RLC circuits, or the angle of any phasor.

How much stock and solvent for a 1:20 (or any 1:N) dilution, plus C1V1 = C2V2 solving.

Volume of a box or cylinder in cubic metres, litres, gallons and cubic feet from any length unit.