Mathematics & Stats
High-precision mathematical utilities for percentages, fractions, statistics, and scientific calculations.
Least Common Multiple (LCM / НОК) Calculator
Calculate the least common multiple (LCM / НОК) of two or three positive integers.
Average (Mean, Median, Mode) Calculator
Calculate the arithmetic mean, median, mode, minimum, maximum, and range of a set of numbers.
Standard Deviation & Variance Calculator
Calculate sample and population standard deviation, variance, mean, and sum of squares for any dataset.
Percentage Calculator
Calculate percentage of a number, percentage change (increase/decrease), and what percentage X is of Y.
Fraction Calculator (Add, Subtract, Multiply, Divide)
Perform arithmetic operations on proper and improper fractions, reduce fractions to simplest terms, and convert to decimals.
Scientific Function Calculator
Evaluate scientific mathematical functions including trigonometry, logarithms, roots, powers, and factorials without unsafe arbitrary expressions.
Greatest Common Divisor (GCD / НОД) Calculator
Find the greatest common divisor (GCD / HCF / НОД) of two or three positive integers using the Euclidean algorithm.