Math
Percentage, Age, Fraction, Standard Deviation, Average and more
Percentage Calculator
Calculate percentages, percentage change, discounts, and ratios in one tool. Solve any percent problem with this free online percentage calculator.
Age Calculator
Enter your date of birth to instantly calculate your exact age in years, months, and days. A fast and easy free online age calculator.
Random Number Generator
Generate random numbers within a custom range. Supports integers, decimals, and unique (no-repeat) sets. Free online random number generator.
Fraction Calculator
Add, subtract, multiply, and divide fractions with automatic simplification. Mixed numbers supported. Free online fraction calculator.
Standard Deviation
Calculate standard deviation, variance, and mean for any data set. Supports both population and sample standard deviation. Free online calculator.
Exponent Calculator
Calculate powers and exponents instantly. Supports negative and fractional exponents. Free online exponent and power calculator.
Logarithm Calculator
Calculate common logarithms, natural logarithms, and logarithms with any base instantly. Free online logarithm calculator with formulas.
Square Root Calculator
Calculate square roots, cube roots, and nth roots instantly. Simplify radicals automatically. Free online square root calculator.
Ratio Calculator
Solve proportions, simplify ratios, and find missing values in ratio equations. Free online ratio and proportion calculator.
Average Calculator
Calculate the arithmetic mean, median, and mode of a data set in one step. Weighted average supported. Free online average calculator.
Prime Number Checker
Instantly check if a number is prime and see its prime factorization. List all primes in a range. Free online prime number checker.
GCD & LCM Calculator
Find the greatest common divisor and least common multiple of two or more numbers using the Euclidean algorithm. Free online GCD & LCM calculator.
Trigonometry Calculator
Calculate sin, cos, tan and inverse trig functions in degrees or radians. Includes a trig table reference. Free online trigonometry calculator.
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 instantly. Supports E-notation and engineering notation. Free online scientific notation converter.