LCM Calculator

Use our free LCM calculator to find the least common multiple of two or more integers, using the GCD-based formula.

Math

Numbers

Formula

The least common multiple (LCM) is the smallest positive integer that is divisible by all given numbers. Uses the formula LCM(a,b) = |a×b| / GCD(a,b).

LCM(a, b) = |a × b| / GCD(a, b)

Percentage: The percentage value you want to apply

Number: The original number or value

Result: The calculated result

How It Works

1Enter two or more numbers separated by commas.
2The calculator computes GCD, then uses the LCM formula.
3Results show the LCM value.

Examples

LCM of 12 and 18

1.GCD(12,18)=6
2.LCM=12×18/6=36

Result: 36

LCM of 12, 18, 24

1.LCM(12,18)=36
2.LCM(36,24)=72

Result: 72

LCM of 7 and 11

1.Both prime — LCM = 7×11 = 77

Result: 77

Frequently Asked Questions

The smallest positive integer divisible by all given numbers.

LCM(a,b) = |a×b| / GCD(a,b).

Compute pairwise: LCM(a,b,c) = LCM(LCM(a,b), c).

The LCM is always positive, using absolute values.

LCM with 0 is undefined. All numbers must be non-zero.

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CalculateMe Team

Last updated: 2026-07-14

LCM Calculator

Formula

How It Works

Examples

LCM of 12 and 18

LCM of 12, 18, 24

LCM of 7 and 11

Frequently Asked Questions

What is LCM?

How is LCM related to GCD?

LCM of more than 2 numbers?

Can I use negative numbers?

Why enter 0?

Related Calculators

LCM Calculator

Formula

How It Works

Examples

LCM of 12 and 18

LCM of 12, 18, 24

LCM of 7 and 11

Frequently Asked Questions

What is LCM?

How is LCM related to GCD?

LCM of more than 2 numbers?

Can I use negative numbers?

Why enter 0?

Related Calculators