Least Common Denominator Calculator

Use our free least common denominator calculator to find the LCD of two fractions. The least common denominator is the smallest number both denominators divide evenly into.

Math

First Denominator

Second Denominator

Formula

The least common denominator (LCD) is the smallest positive integer that is a multiple of both denominators. It is found using the formula: LCD = (a×b) / GCD(a, b).

LCD = LCM(D₁, D₂)

Percentage: The percentage value you want to apply

Number: The original number or value

Result: The calculated result

How It Works

1Enter the first denominator.
2Enter the second denominator.
3Click Calculate to find the LCD using the GCD method.

Examples

Find LCD of 6 and 8

1.First denominator: 6.
2.Second denominator: 8.
3.GCD of 6 and 8 is 2.
4.LCD = (6×8) ÷ 2 = 48 ÷ 2 = 24.

Result: 24

Frequently Asked Questions

The least common denominator (LCD) is the smallest number that both denominators can divide evenly into. It is the least common multiple (LCM) of the denominators.

A common denominator can be any shared multiple (like the product of both denominators). The LCD is the smallest possible common denominator.

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CalculateMe Team

Last updated: 2026-07-13

Least Common Denominator Calculator

Formula

How It Works

Examples

Find LCD of 6 and 8

Frequently Asked Questions

What is the least common denominator?

How is LCD different from a common denominator?

Related Calculators

Least Common Denominator Calculator

Formula

How It Works

Examples

Find LCD of 6 and 8

Frequently Asked Questions

What is the least common denominator?

How is LCD different from a common denominator?

Related Calculators