Math & Everyday Calculators

GCD Calculator

Use GCD Calculator free in your browser. No account required; your input is processed locally in your browser.

Runs locallyYour inputs stay in your browser.
Workspace
Result
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HOW IT IS CALCULATED

Find the greatest common divisor

Find the largest integer that divides both input values without a remainder.

Instant resultClear formulaRuns locally
01Values
02GCD(a,b)
03Result

GCD(48,18) = 6

GOOD TO KNOW

GCD is useful for simplifying ratios and fractions

Dividing numerator and denominator by their GCD reduces a fraction to lowest terms.

02

In short

What logic does the calculator use?

GCD(a,b)

Example?

GCD(48,18) = 6