LCM: Least Common Multiple

LCM Calculator finds the least common multiple of a list of whole numbers: the smallest positive number that every value in the list divides into evenly. Type the numbers separated by commas or spaces, tap Calculate, and the app shows the LCM.

Example
For 12, 15 and 75 the LCM is 300. Each of the three divides 300 with no remainder, and no smaller number does.

Where people use it
• Adding or subtracting fractions with different denominators
• Finding when repeating events line up, such as buses that leave every 12, 18 and 20 minutes meeting again after 180 minutes
• Working out the full cycle of gears, belts, or rotating shift patterns
• Solving school and puzzle problems about multiples

Good to know
• Enter at least two numbers
• Use whole numbers, not decimals
• The app returns the LCM only, without the factor steps

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