Math Calculators

Percentage, fraction, algebra and general-purpose math calculators for students and engineers.

16 calculators in this category

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

A free online TI-84 style scientific calculator. Evaluate any expression — trig, logs, roots, exponents, and parentheses — instantly.

Solve linear, quadratic, and 2-equation systems with full step-by-step working. Supports ax + b = c, ax² + bx + c = 0, and {ax+by=c, dx+ey=f}.

Enter any set of numbers to find the mean, median, mode, range, variance, and standard deviation.

Solve any quadratic equation ax² + bx + c = 0. Get both roots — real or complex — and see the discriminant and vertex.

Simplify ratios and solve proportions — find the missing term in A:B = C:D for cooking, scaling recipes, maps, and mixing ratios.

Find the straight-line distance between two points in the coordinate plane — uses the Pythagorean-derived distance formula.

Add, subtract, multiply, or divide two fractions. Get a simplified fraction, mixed number, and decimal.

Find the midpoint of a line segment between two points (x₁, y₁) and (x₂, y₂) — averages the x and y coordinates separately.

Calculate any base raised to any power — including negative, fractional, and decimal exponents. Get the result, scientific notation, and explanation.

Compute log_b(x) for any base — common log (base 10), natural log (base e), or any custom base. Includes change-of-base details.

Solve a² + b² = c² for any missing side — find the hypotenuse from two legs, or a leg from the hypotenuse and one leg.

Compute mean, variance, and standard deviation of a list of numbers — both sample (n−1) and population (n) versions.

Find the square root, cube root, or any nth root of a number — with simplified radical form for whole-number radicands.

Find the greatest common factor (GCF) and least common multiple (LCM) of any set of integers.

Find the slope of a line through two points — plus the y-intercept, the slope-intercept form (y = mx + b), and the angle of inclination.