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Greatest Common Factor Calculator

Find the greatest common factor (GCF) — also called the greatest common divisor (GCD) — of two integers using the Euclidean algorithm. The largest number that divides both inputs evenly; used everywhere from simplifying fractions to designing tilings to cryptography.

First Number

Second Number

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Math

Ratio Calculator

Simplify any two-number ratio to its lowest terms and explore equivalent ratios in seconds. Ideal for cooking, map scaling, financial analysis, and mixing solutions where proportional relationships matter.

First Value

Second Value

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Key differences

	Greatest Common Factor Calculator	Ratio Calculator
Category	Math	Math
Inputs required	2	2
Result	Greatest Common Factor	Ratio (decimal) (:1)
What it does	Find the greatest common factor (GCF) — also called the greatest common divisor (GCD) — of two integers using the Euclidean algorithm. The largest number that divides both inputs evenly; used everywhere from simplifying fractions to designing tilings to cryptography.	Simplify any two-number ratio to its lowest terms and explore equivalent ratios in seconds. Ideal for cooking, map scaling, financial analysis, and mixing solutions where proportional relationships matter.