Math & Calculators•Free & Browser-Based

GCD Calculator

Find the Greatest Common Divisor (GCD / HCF) of two or more numbers using the Euclidean algorithm with step-by-step working.

First Number

Second Number

Least Common Multiple (LCM)

Greatest Common Divisor (GCD / HCF)

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What is the Free Online GCD Calculator?

The Greatest Common Divisor (GCD), also known as the Highest Common Factor (HCF), is the largest positive integer that divides each of the numbers without leaving a remainder.

100% Client-Side Privacy: Calculations and data processing occur entirely in your local browser memory. Zero files or personal inputs are uploaded to our servers.

How to Use GCD Calculator Online: Step-by-Step Guide

1Enter two or more positive integers.
2View the GCD and step-by-step Euclidean division remainder table.

Real-World Calculation Example

GCD of 48 and 18: $48 = 18 \times 2 + 12$; $18 = 12 \times 1 + 6$; $12 = 6 \times 2 + 0$. Remainder is 0, so $\text{GCD} = 6$.

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