HCF (Highest Common Factor), also called GCD (Greatest Common Divisor), is the largest factor common to two or more numbers.

Math Calculators

HCF Calculator – Find Highest Common Factor

Calculate the Highest Common Factor (HCF) or Greatest Common Divisor (GCD) of two numbers.

Number 1

Number 2

HCF/GCD Calculator Formula

HCF is found using the Euclidean algorithm:

Repeatedly divide and take remainders until remainder = 0. The last non-zero remainder is the HCF.

HCF of 48 and 36:

48 = 36 × 1 + 12

36 = 12 × 3 + 0

HCF = 12

What is HCF?

Calculate the Least Common Multiple (LCM) of two or more numbers. Essential for fraction operations and math problems.

Simplify ratios and solve proportion problems. Find equivalent ratios and missing values in proportions.

Calculate percentages easily. Find what percent one number is of another, or calculate the percentage of a number.