Math
Percentage, Age, Fraction, Standard Deviation, Average and more
Percentage Calculator
Calculate percentages, percentage change, discounts, and ratio conversions in one tool. Find what X% of a number is or the percent difference between two values for free.
Age Calculator
Enter your date of birth to instantly calculate your exact age in years, months, and days, plus the total days you have lived and the days until your next birthday, free and online.
Random Number Generator
Generate random numbers within any custom min-to-max range. Choose integers or decimals, set the count, and allow duplicates or unique sets, using crypto-grade randomness.
Fraction Calculator
Add, subtract, multiply, and divide two fractions instantly with our free fraction calculator. Enter numerators and denominators to get the simplified result, mixed number, and decimal value automatically.
Standard Deviation
Calculate the standard deviation, variance, and mean of any data set, with both population and sample formulas. A free statistics calculator showing how far data spread from the average.
Exponent Calculator
Calculate powers and exponents instantly. Enter a base and exponent to get the result, with support for negative and fractional exponents in this free online power calculator.
Logarithm Calculator
Calculate logarithms with any base, including common log (base 10) and natural log (ln). Enter a number and base to get the result with the change-of-base formula using this free logarithm calculator.
Square Root Calculator
Calculate square roots, cube roots, and nth roots instantly, and simplify radicals automatically into exact form. A free root calculator for the Pythagorean theorem and distance.
Ratio Calculator
Simplify ratios to lowest terms, solve proportions of the form a:b = c:x, and find missing values in a ratio equation. A free ratio and proportion calculator for recipes and scales.
Average Calculator
Calculate the arithmetic mean, median, and mode of a data set in one step, with geometric, harmonic, and weighted averages supported. Enter numbers separated by commas or spaces.
Prime Number Checker
Instantly check whether a number is prime, view its full prime factorization, and list every prime within a chosen range. A fast online prime checker based on divisibility.
GCD & LCM Calculator
Find the greatest common divisor (GCD) and least common multiple (LCM) of two or more integers instantly. Enter your numbers to see results with the Euclidean algorithm and prime factorization steps.
Trigonometry Calculator
Calculate sin, cos, tan and inverse trig functions in degrees or radians. Includes a trig table reference for angles. Free online trigonometry calculator for students.
Matrix Calculator
Perform matrix addition, multiplication, inverse, determinant, and transpose operations. Supports up to 10x10 matrices. Free online matrix calculator.
Scientific Notation
Convert numbers to and from scientific notation (a × 10ⁿ) instantly, with E-notation and engineering notation. Handle very large or tiny values and read off significant figures.