# GCD/LCM Calculator

The GCD/LCM Calculator calculates the greatest common divisor, or least common multiple for two, or three numbers. Enter the numbers in the fields below, and press Calculate. Remember that you do not need to enter the third number for the calculator to work, so the third field can be left blank if only calculating the GCD or LCM for two numbers.

.**First Number:**

**Second Number:**

**Third Number (not required):**

**GCF:**

**LCM:**