Math Calculators

Free online math calculators that show full step-by-step solutions. Understanding the method — not just the answer — is what makes a calculation useful.

Arithmetic & Percentages

Percentage Calculator — three types: X% of Y, X is what % of Y, and percentage change

Fractions & Ratios

Fraction Calculator — add, subtract, multiply, and divide fractions with step-by-step working
Ratio Calculator — simplify ratios, solve proportions, and convert to percentages

Number Theory

GCF Calculator — greatest common factor using the Euclidean algorithm with all steps shown
LCM Calculator — least common multiple via prime factorization and GCF formula
Factor Calculator — all factors, factor pairs, and prime factorization by trial division

Algebra

Quadratic Formula Calculator — solve ax² + bx + c = 0, discriminant, vertex, real and complex roots
Exponent Calculator — any base raised to any power, including negative and fractional exponents

Geometry

Triangle Calculator — sides, angles, area, and perimeter for any triangle type
Pythagorean Theorem Calculator — solve for any side of a right triangle using a² + b² = c²
Circle Calculator — area, circumference, diameter, and sector calculations
Area Calculator — formulas for multiple shapes: square, rectangle, triangle, circle, trapezoid
Volume Calculator — volume of spheres, cubes, cylinders, cones, and pyramids
Slope Calculator — slope, y-intercept, distance, and midpoint for two points

Advanced Math

Logarithm Calculator — log base-10, natural log (ln), and any custom base with step-by-step work
Scientific Calculator — expression-based calculator with trig, log, and power functions

Statistics & Probability

Standard Deviation Calculator — population and sample standard deviation with full variance breakdown
Mean, Median, Mode Calculator — central tendency measures for any dataset
Z-Score Calculator — standard score and probability from the normal distribution
Probability Calculator — basic, combined (AND/OR), and binomial probability