Math Calculators
Last updated: October 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
Break a whole number into the prime numbers that multiply to give it, such as 360 = 2 x 2 x 2 x 3 x 3 x 5.
Square Root Calculator
Find the square root of any non-negative number, shown to 10 significant digits, with whole numbers also simplified to radical form (√50 = 5√2).
Fraction Calculator
Simplify a fraction to lowest terms, or add, subtract, multiply and divide two fractions.
Least Common Multiple Calculator
Find the least common multiple (LCM) of two whole numbers: the smallest number both divide into evenly.
Greatest Common Factor Calculator
Find the greatest common factor (GCF), also called the greatest common divisor (GCD), of two whole numbers with Euclid's algorithm.
Exponent Calculator
Raise a base to any power, bᵉ: whole, negative, fractional or decimal exponents.
Percentage Change Calculator
Find the percentage increase or decrease from an original value to a new value.
Circle Area Calculator
Calculate the area of a circle from its radius with A = πr², with the diameter and circumference shown alongside.
Decimal to Fraction Converter
Convert a decimal such as 0.625 or 2.75 into a fraction in lowest terms.
Cube Root Calculator
Calculate the cube root of any number, including negative values.
Scientific Notation Converter
Convert a number to scientific notation, a × 10ⁿ with 1 ≤ |a| < 10, and see its full decimal form.
Midpoint Calculator
Find the midpoint of a line segment from the coordinates of its two endpoints, (x₁, y₁) and (x₂, y₂).
Logarithm Calculator
Calculate the logarithm of any positive number in any base: common log (base 10), natural log (base e), binary log (base 2) or a custom base.
Percent Error Calculator
Find the percent error between a measured or estimated value and the accepted true value: |measured − true| ÷ |true| × 100.
Proportion Calculator
Find the missing fourth value d in any proportion a/b = c/d when three values are known.
Rounding Calculator
Round any number to a chosen number of decimal places in seconds.
Average Calculator
Find the average (arithmetic mean) of two to five numbers: their sum divided by how many there are.
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
Enter an IPv4 address and CIDR prefix to get the network address, subnet mask, usable host range, host count and broadcast address.
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 with 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
Solve a right triangle with a² + b² = c².
Slope Calculator
Find the slope of the line through two points as rise over run, (y₂ − y₁) ÷ (x₂ − x₁).
Long Division Calculator
Divide two integers and see the quotient and remainder in the form used by classical long division.