Math

Math Calculators

42 calculators

Popular calculators

Fractions and factors

Averages and statistics

Percentages and prices

Roots and powers

Choose a tool for fractions, averages, percentages or roots. Follow the calculation steps where available and compare the relevant tools below. Decimal answers may be rounded; input limits and assumptions are explained on each page.

About

Absolute Value Calculator Find the absolute value of a number — its distance from zero, ignoring sign.
Average Calculator — Arithmetic Mean Find the arithmetic mean, sum, count, minimum and maximum of a list of numbers. Enter positive or negative values, decimals or scientific notation.
Number Base Converter Convert a number between binary, octal, decimal, hexadecimal and base 36 at once.
Binary to Decimal Converter Convert binary numbers to decimal, with hexadecimal and octal equivalents.
Combinations Calculator Calculate how many ways you can choose r items from n without regard to order.
Cross Multiply Calculator Solve for the unknown in a proportion using cross multiplication.
Cube Root Calculator Calculate the cube root of a number, including negative values.
Decimal to Fraction Calculator Convert a decimal into a fraction in simplest form, with the mixed number form shown too.
Exponent Calculator Raise any number to a power, including negative and fractional exponents, with the root shown as well.
Factorial Calculator Calculate the factorial of a number, plus the number of trailing zeros in the result.
Fraction Calculator — Four Operations Add, subtract, multiply or divide two fractions. Get a simplified fraction, decimal result and calculation steps, including negative fractions.
GCF and LCM Calculator Find the GCF, exact LCM and simplified ratio of two or three numbers, or a list of 2–20 integers.
GPA Calculator Calculate your grade point average from letter grades and credit hours on a 4.0 scale.
Hex to Decimal Converter Convert hexadecimal numbers to decimal, with binary and octal equivalents.
Improper Fraction to Mixed Number Calculator Convert between improper fractions and mixed numbers, with the decimal value.
Logarithm Calculator Calculate logarithms in any base, plus the natural log and log base 10.
Long Division Calculator Divide two whole numbers and see the quotient, remainder and the working.
Math Calculator Evaluate a decimal arithmetic expression with brackets, powers and the remainder operator.
Matrix Determinant Calculator Calculate the determinant of a 3×3 matrix.
Matrix Multiply Calculator Multiply two 2×2 matrices and get the resulting matrix and its determinant.
Mean Calculator – Arithmetic, Geometric & Harmonic Choose arithmetic, geometric or harmonic mean for a list of numbers. Compare results and try an equal-distance speed example.
Median Calculator — Find Median, Quartiles & Data Range Find the median, quartiles and range of a data set.
Mixed Number Calculator Add, subtract, multiply and divide mixed numbers and get the answer as both a mixed number and an improper fraction.
Mode Calculator Find the most frequent value or values in a data set.
Modulo Calculator Calculate the remainder after division, including the quotient and a negative-number-correct result.
Number Sequence Calculator Find the nth term and the sum of an arithmetic or geometric sequence.
Octal to Decimal Converter Convert octal numbers to decimal, with binary and hexadecimal equivalents.
Percentage Calculator — Find %, Part, Whole or Change Solve any percentage question: what percent, X% of Y, reverse percent, percent change, or increase by a percent. Instant answers, no sign-up.
Permutations Calculator Calculate the number of ordered arrangements of r items chosen from n.
Prime Number Checker Check whether a number is prime and see how many divisors it has.
Prime Factorization Calculator — Steps Find prime factors with exponents or as an expanded product. Follow division steps, check the product and list positive divisors for integers from 2 to 10¹².
Probability Calculator Combine two independent probabilities to get the chance of both, either or neither happening.
Proportion Calculator Solve a proportion: find the missing value in a : b = c : d.
Quadratic Equation Calculator Solve a quadratic equation ax² + bx + c = 0 and get the discriminant, roots and vertex.
Ratio Calculator Simplify a ratio and scale it up or down to an equivalent ratio.
Roman Numeral Converter Convert numbers to Roman numerals and Roman numerals back to numbers.
Rounding Calculator Round a number to a given number of decimal places or to the nearest ten, hundred or thousand.
Scientific Calculator Evaluate an expression with roots, powers, logarithms and trigonometry.
Significant Figures Calculator Round a number to a chosen number of significant figures.
Square Root Calculator — Nth Roots Calculate square, cube and integer nth roots, simplify square radicals, and check the result. Supports negative numbers with odd root degrees.
Standard Deviation Calculator Calculate population and sample standard deviation, variance and standard error.
Weighted Average Calculator Calculate a weighted average from values and their weights.

Start with the quantity you already know. Percentage modes solve for part, whole or change; averages split mean from median when outliers matter; fractions stay as improper results unless you convert. Each calculator states its rounding and rejection rules on the page.

Choose the operation, not a similar-sounding name

Arithmetic average and a choice of arithmetic, geometric or harmonic means are different tasks. A GCF tool with list input also differs from a small fixed set of integer fields. Follow the page’s input rules, especially for zeros, negatives and decimal separators.

Move from arithmetic to equations and matrices

Use a quadratic solver for a second-degree equation, matrix multiplication for a product of compatible matrices, or a determinant tool for a square matrix. These operations require different data structures; a generic scientific expression is not a substitute for every solver.

Check exact and approximate outputs

Reduced fractions and supported integer calculations can be exact, while roots, statistical summaries and decimal outputs may be rounded. Keep the original inputs when checking an answer and distinguish a displayed approximation from the underlying mathematical value.