Greatest Common Divisor (GCD / GCF)
Calculate Greatest Common Divisor (GCD / GCF) instantly. Free online calculator with the exact formula, a worked example, and metric units. No signup required.
Greatest Common Divisor (GCD / GCF)
Number a
Number b
GCD
12
GCD
12
LCM
72
a
24
b
36
More about: Greatest Common Divisor (GCD / GCF)
What it calculates
The “Greatest Common Divisor (GCD / GCF)” calculator computes GCD from 2 parameters: number a, number b.
A core calculation for studying, engineering tasks, and checking solutions.
Example calculation
With parameters Number a = 24, Number b = 36 the result is 12 (Euclid's algorithm).
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.