Math Tools

Calculators for everyday and advanced math.

• Percentage Calculator

  Calculate what percent of a number is, find percent change, and reverse-calculate any percentage. Three modes — pick the one that matches your problem, get the answer instantly.

• Average Calculator

  Calculate mean, median, mode, range, sum, min, and max for any list of numbers. Paste in grades, scores, or measurements — results update instantly.

• Fraction Calculator

  Add, subtract, multiply, and divide fractions with full step-by-step results showing the LCD, equivalent fractions, and simplified answer. Handles mixed numbers and improper fractions.

• Ratio Calculator

  Simplify ratios to lowest terms, convert a ratio to a decimal, scale to any value, and compare two ratios. For recipes, map scales, and aspect ratios.

• Rounding Calculator

  Round numbers to the nearest integer, decimal place, or significant figure. Choose round half-up, half-down, or toward zero. Handles large and small numbers precisely.

• Root Calculator

  Calculate square roots, cube roots, and any nth root with high precision. Handles perfect squares and irrational results — shows the decimal approximation and the radical form.

• Exponent Calculator

  Raise any base to any power — including negative bases, decimal exponents, and fractional powers. Shows the full numeric result with high precision for scientific and engineering work.

• Logarithm Calculator

  Calculate log base 10, natural log (ln), log base 2, and log to any custom base. Shows step-by-step working — useful for chemistry, information theory, and general math.

• Antilog Calculator

  Calculate the antilog (inverse logarithm) for any base — base 10, base e (natural), or a custom base. Converts log values back to their original numbers instantly.

• GCF / GCD Calculator

  Find the greatest common factor (GCF) — also called GCD — of two or more integers. Uses the Euclidean algorithm and shows step-by-step working. Useful for simplifying fractions.

• LCM Calculator

  Find the least common multiple of any set of integers. Shows prime factorization and step-by-step working — useful for adding fractions, scheduling problems, and number theory.

• Factorial Calculator

  Calculate n! for any integer using big-int math that handles very large numbers precisely. Shows the full expanded result — useful for combinatorics, statistics, and algorithm analysis.

• Permutation & Combination Calculator

  Calculate nPr (permutations) and nCr (combinations) with a step-by-step formula breakdown. Enter n and r to see the count, formula expansion, and intermediate values.

• Probability Calculator

  Calculate the probability of single events and combined events (and/or). Enter counts or fractions to find probability, odds, and complementary probability in one step.

• Standard Deviation Calculator

  Calculate population and sample standard deviation, variance, and mean for any data set. Paste numbers one per line or comma-separated — results and formula shown instantly.

• Triangle Calculator

  Solve any triangle from sides or angles using the law of sines and cosines. Enter any three values (SSS, SAS, ASA, AAS, or SSA) and get all remaining sides, angles, and area.

• Circle Calculator

  Calculate the area, circumference, diameter, and radius of a circle from any one known value. Instant results with formulas shown — useful for geometry, engineering, and design.

• Equation Solver

  Solve linear equations (ax + b = c) and quadratic equations (ax² + bx + c = 0) symbolically. Shows step-by-step working and real or complex roots for quadratics.

• Matrix Calculator

  Add, subtract, multiply, transpose, and invert matrices of any size. Shows intermediate steps for multiplication and Gaussian elimination for matrix inversion.

• Scientific Calculator

  Full scientific calculator with trigonometric functions (sin, cos, tan), logarithms, exponents, factorials, and constants. Supports degree and radian mode.