Math Calculators

Percentage Calculator

Quickly calculate X% of Y, what percentage one number is of another, or the percentage change between two values.

TI-84 Calculator

A free TI-84 style scientific calculator in your browser: TI-84 key layout, DEG/RAD modes, trig, logs, powers, roots, π, e and ANS.

Algebra Equation Solver

Solve linear equations and systems of two equations step by step, with a substitution check, plus quick decimal roots for quadratics.

Fraction Calculator

Add, subtract, multiply or divide fractions and mixed numbers, with step-by-step working. Answers are simplified and shown as a mixed number and a decimal.

Statistics Calculator

Paste any list of numbers to get the mean, median, mode, range, quartiles, IQR, outliers, variance and standard deviation (sample and population).

Ratio Calculator

Solve A : B = C : D for a missing value, check whether two ratios are proportional, and simplify a ratio to lowest terms, with its decimal and percent forms.

Exponent Calculator

Calculate bⁿ for whole, negative and decimal exponents, with scientific notation and a breakdown of what the power means, such as 10 factors of 2.

Quadratic Equation Solver

Solve any quadratic ax² + bx + c = 0 for real or complex roots, with the exact radical form, discriminant, vertex, factored form and quadratic-formula steps.

Distance Formula Calculator

Find the distance between two points in the coordinate plane as a decimal and in exact simplified-radical form, with Δx, Δy and the steps.

Pythagorean Theorem Calculator

Find the hypotenuse or a missing leg with a² + b² = c², see the exact radical form and steps, or check whether three sides make a right triangle.

Square Root Calculator

Find square roots, cube roots and nth roots up to n = 20, with the simplified radical form for whole numbers and a check that raises the root back to the power n.

Logarithm Calculator

Find log_b(x) for any positive x and base, with log₁₀, ln and log₂ alongside and the change-of-base working and check shown.

Midpoint Calculator

Find the point halfway between two points by averaging their coordinates, with the steps and the length of each half of the segment.

Slope Calculator

Find the slope through two points as a reduced fraction and a decimal, with y = mx + b, point-slope form, perpendicular slope and vertical or horizontal lines.

Standard Deviation Calculator

Paste a list of numbers to get the sample and population standard deviation, variance, mean, range and coefficient of variation, with step-by-step working.

GCF and LCM Calculator

Find the GCF and LCM of two or more whole numbers, with the prime factorization of every number, the GCF and the LCM.