Math & Scientific Calculators
Scientific calculator, averages, fractions, GCD/LCM, primes, Roman numerals and random numbers.
Scientific Calculator
Online scientific calculator with trigonometry, logarithms, roots, powers and factorial in degrees or radians.
Average, Median & Mode Calculator
Compute mean, median, mode, range and standard deviation for any set of numbers.
Fraction Calculator
Add, subtract, multiply and divide fractions with simplified, mixed-number and decimal results.
GCD & LCM Calculator
Calculate GCD and LCM of two or more integers exactly.
Prime Number Checker & Factorization
Check whether a number is prime and factor it into primes.
Roman Numerals Converter
Convert numbers to Roman numerals (1–3999) and back, with validation.
Random Number Generator
Generate cryptographically-strong random numbers in any range, optionally without repeats, plus dice and coin.
About Math & Scientific Calculators
The Math & Scientific Calculators section has 7 free tools that run in your browser without uploading your data, including Scientific Calculator, Average, Median & Mode Calculator, Fraction Calculator, GCD & LCM Calculator, Prime Number Checker & Factorization and Roman Numerals Converter. Scientific calculator, averages, fractions, GCD/LCM, primes, Roman numerals and random numbers.