Basic Math Calculators

Calculate absolute value, cube root and factorial and other basic math calculations.

Popular:Absolute Value CalculatorCube Root CalculatorFactorial CalculatorGCF CalculatorLCM CalculatorModulo Calculator

All Basic Math Calculators

Absolute Value CalculatorCalculate the absolute value of a number — its distance from zero, always expressed as a non-negative value.Cube Root CalculatorCalculate the cube root of any number, positive or negative.Factorial CalculatorCalculate the factorial (n!) of a whole number — the product of all positive integers up to n.GCF CalculatorCalculate the greatest common factor (GCF), also known as the greatest common divisor (GCD), of two whole numbers.LCM CalculatorCalculate the least common multiple (LCM) of two whole numbers.Modulo CalculatorCalculate the modulo of two numbers (a mod b) — the result always takes the sign of the divisor, matching the convention used in mathematics and languages like Python.Nth Root CalculatorCalculate the nth root of any number, for any root degree you choose — a generalization of square root and cube root.Percent Error CalculatorCalculate the percent error between an experimental (measured) value and a theoretical (accepted) value — commonly used in science and lab work.Percentage CalculatorCalculate what a given percentage of a number is, along with the remaining amount — for example, "what is 20% of 250?"Percentage Change CalculatorCalculate the percentage change between an original value and a new value — works for both increases and decreases.Percentage Decrease CalculatorCalculate the percentage decrease from an original value to a lower new value.Percentage Difference CalculatorCalculate the symmetric percentage difference between two values, treating neither value as the "before" baseline.Percentage Increase CalculatorCalculate the percentage increase from an original value to a higher new value.Remainder CalculatorCalculate the remainder of two numbers (a divided by b) — the result always takes the sign of the dividend, matching the convention used by most calculators and programming languages like JavaScript and C.Rounding CalculatorRound a number to a fixed number of decimal places, or to the nearest multiple of any amount — to the nearest value, always up, or always down.Scientific Notation CalculatorConvert a number between standard decimal form and scientific notation (a × 10^b), in either direction.Square Root CalculatorCalculate the square root of any non-negative number.

Basic Math Guides

Mathematics1 min read

How Exponents, Roots, and Logarithms Are Inverse Operations

Exponentiation, roots, and logarithms all describe the same relationship between three numbers — a base, an exponent, and a result — each one solving for whichever piece the other two leave unknown.

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Mathematics1 min read

How GCF and LCM Are Related, and Why Simplifying Fractions Uses GCF

GCF and LCM are two sides of the same calculation — the LCM formula is built directly from the GCF — and each one solves a different fraction problem: GCF simplifies a single fraction, while LCM finds a common denominator to add two fractions together.

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Mathematics1 min read

How to Find the Greatest Common Factor of Two Numbers

The greatest common factor (GCF) of two numbers is found efficiently with the Euclidean algorithm — repeatedly replacing the larger number with the remainder of dividing it by the smaller, until the remainder reaches zero.

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Mathematics1 min read

How to Find the Least Common Multiple of Two Numbers

The least common multiple (LCM) of two numbers is the product of the two numbers divided by their greatest common factor — a shortcut that avoids listing out multiples one by one.

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Mathematics2 min read

Percent Error Explained: Measuring How Far Off a Result Is

Percent error compares a measured (experimental) value against a known or accepted (theoretical) value — always reported as a positive magnitude, since the point is to quantify how far off a measurement was, not which direction it missed by.

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Other Mathematics Subcategories

Arithmetic14 calculatorsExplore →Geometry8 calculatorsExplore →Number Systems7 calculatorsExplore →Trigonometry6 calculatorsExplore →