Math Calculators
Last updated: September 2026
Percentage Calculator
Find what a given percentage of a number is — for example, 18% of a $42 restaurant bill, or 7.5% sales tax on a $129 purchase.
Prime Factorization Calculator
Decompose any positive integer into its unique product of prime numbers — the fundamental "atomic" representation that underlies divisibility, fractions, modular arithmetic, and cryptography.
Square Root Calculator
Find the square root of any non-negative number instantly.
Fraction Simplifier
Reduce any fraction to its lowest terms instantly by finding the greatest common divisor.
Linear Equation Solver
Solve any single-variable linear equation of the form ax + b = 0 for the unknown x.
Exponent Calculator
Raise any base to any power — including negative, fractional, and decimal exponents.
Least Common Multiple Calculator
Find the least common multiple (LCM) of two positive integers — the smallest number that both divide evenly into.
Prime Number Checker
Instantly determine whether any positive integer is a prime number.
Greatest Common Factor Calculator
Find the greatest common factor (GCF) — also called the greatest common divisor (GCD) — of two integers using the Euclidean algorithm.
Circle Area Calculator
Calculates the area enclosed by a circle from its radius using A = π·r².
Percentage Change Calculator
Calculate the percentage increase or decrease between an old value and a new value.
Absolute Value Calculator
Find the absolute value of any positive or negative number instantly.
Ratio Calculator
Simplify any two-number ratio to its lowest terms and explore equivalent ratios in seconds.
Fraction to Percent Calculator
Convert any fraction to a percentage by dividing the numerator by the denominator and multiplying by 100.
Scientific Notation Converter
Convert numbers between standard decimal form and scientific notation (a × 10ⁿ, with 1 ≤ |a| < 10).
Decimal to Fraction Converter
Convert any terminating decimal into an equivalent fraction in its simplest form.
Cube Root Calculator
Calculate the cube root of any number, including negative values.
Midpoint Calculator
Finds the exact midpoint coordinates between two points on a plane by averaging their x- and y-values.
Permutation Calculator
Calculate the number of ordered arrangements of r items chosen from n distinct items, where the order of selection matters.
Percentage Increase Calculator
Calculate the final value after applying a percentage increase to any starting number.
Percentage Decrease Calculator
Find the resulting value after reducing a number by a set percentage.
Percent Error Calculator
Measure how far an estimated or measured value deviates from the true value as a percentage.
Percentage Difference Calculator
Compare two values symmetrically by expressing their difference as a percentage of their average.
Proportion Calculator
Find the missing fourth value d in any proportion a/b = c/d when three values are known.
Combination Calculator
Calculate the number of unordered selections of r items from n distinct items, where the order does not matter.
Basic Probability Calculator
Instantly calculate the probability of an event by entering the number of favorable and total outcomes.
Logarithm Calculator
Compute the logarithm of any positive number in any positive base using the change-of-base formula.
Rounding Calculator
Round any number to a chosen number of decimal places in seconds.
Average Calculator
Calculate the arithmetic mean (commonly just called "the average") of up to five numbers — the simplest and most widely used measure of central tendency.
Modulo Calculator
Compute a mod b — the remainder when dividend a is divided by divisor b.
Random Number Generator
Generate a uniformly random integer between a minimum and maximum value (inclusive).
Tip Calculator
Calculate the tip amount and the total per person for any restaurant bill, with an optional split between multiple people.
IP Subnet Calculator
Compute the number of usable hosts in an IPv4 subnet from its CIDR prefix length.
Bandwidth Calculator
Convert a data-transfer size and duration into a throughput rate in megabits per second.
Mixed Number Calculator
Add, subtract, multiply, or divide two mixed numbers (whole + fraction).
Quadratic Formula Calculator
Solve a quadratic equation ax² + bx + c = 0 for its real root using the quadratic formula.
Compound Interest Calculator
Project the future value of an investment given a lump-sum principal, recurring monthly contributions, an annual rate, and a compounding frequency.
Pythagorean Theorem Calculator
Find the hypotenuse of a right triangle from its two legs using a² + b² = c².
Factorial Calculator
Compute the factorial n!, the product of all positive integers up to n.
Slope Calculator
Calculate the slope of a line between two points using (y₂ − y₁) / (x₂ − x₁).
Distance Formula Calculator
Calculate the straight-line distance between two points on a coordinate plane using √((x₂−x₁)² + (y₂−y₁)²).
Long Division Calculator
Divide two integers and see the quotient and remainder in the form used by classical long division.