The LCM Function Calculates the least common multiple between two or more numbers. The least common multiple is the smallest integer that can be divided by all the numbers provided.

**Syntax**: =LCM(number1, [number2], …)

The LCM function syntax has the following arguments:

- number1: The first number or array of numbers you want to calculate the LCM for.
- [number2], … Optional. Additional numbers up to 254 (for a total of 255).

**Example**: Let’s look at some Excel LCM function examples and explore how to use the LCM function as a worksheet function in Microsoft Excel:

**Syntax**: =LCM(A15,B15)

**Result**:

Based on the Excel spreadsheet above, the following LCM examples would return:

**Syntax**: =LCM(A16,B16)

**Result**: 21

**Syntax**: =LCM(A17,B17)

**Result**: 88

**Syntax**: =LCM(A18,B18,C18)

**Result**: 6510

**Syntax**: =LCM(A19,B19,C19)

**Result**: 9102

**Syntax**: =LCM(A20,B20,C20,D20)

**Result**: 924

**Syntax**: =LCM(A21,B21,C21,D21)

**Result**: 210

**Syntax**: =LCM(A22,B22,C22,D22)

**Result**: 60

**Note**:

- Use the LCM function when you want to calculate the least common multiple of integers. The least common multiple is the smallest positive integer that is a multiple of all of the numbers supplied as arguments. A common use of the LCM function is to add fractions that have different denominators.
- For example, =LCM(3,4) returns 12, since 12 is the smallest multiple of both 3 and 4. However, =LCM(3,4,5) returns 60, since 60 is the smallest multiple of all three numbers.