Math & Scientific Calculators
Everyday and school-level math tools — fractions, factors, percentages, and quick arithmetic you'd otherwise reach for a calculator app to do.
Percentage Calculator
Find what X% of a number is, or what percentage one number is of another.
Fraction Calculator
Add, subtract, multiply, or divide two fractions and get the simplified result.
Prime Number Checker
Check whether a number is prime, with its smallest factor and nearest primes if it isn't.
LCM & GCF Calculator
Find the Least Common Multiple (LCM) and Greatest Common Factor (GCF) of two whole numbers.
Looking for something else? Browse all calculator categories.