13 free maths calculators from the Chemistry Calculator Suite. Each one opens directly, with no login.
A plain calculator for everyday sums: add, subtract, multiply and divide, with percent and backspace keys.
Add, subtract, multiply or divide two complex numbers written in the form a + bi.
Type a function and the limits a and b to evaluate the definite integral ∫ₐᵇ f(x) dx numerically.
Type a function and a point x = a to get the first and second derivatives f′(a) and f″(a) as numbers.
Find the real roots of f(x) = 0 inside a search range you choose.
Plot y = f(x) for any function of x — sin, cos, sqrt, log, exp, abs and ^ are understood — over the x range you set.
Evaluate lim x→a f(x) for a function you type, including limits at infinity (enter inf or -inf for a).
Fit a straight line y = mx + c to x, y pairs by least squares and get r² — the fit behind Arrhenius plots, calibration lines and rate-law data.
Type a 2×2 or 3×3 matrix, one row per line, and get its determinant, inverse and eigenvalues in one step.
Calculate the number of permutations nPr and combinations nCr for any n and r up to n = 170.
Find every root of a polynomial from its coefficients, highest power first — for x³ − 6x² + 11x − 6 you would enter 1, −6, 11, −6.
Paste a list of numbers to get the count, mean, median, and both the population and the sample standard deviation.
Type a function and a point x = a to get the first five terms of its Taylor series about that point.