Lowest Common Denominator Calculator
Enter one fraction per line as numerator/denominator.
A QUICK WALKTHROUGH
How to use this tool
- Enter 2–20 fractions, one per line.
- Use integer numerators and non-zero denominators.
- Calculate the LCD and equivalent fractions.
Defined fraction input
Supports 2–20 fractions with integer numerators and denominators from -1,000,000 to 1,000,000, excluding zero.
Exact integer arithmetic
Results are reduced equivalent fractions using integer arithmetic; the LCD is positive and capped at 1,000,000,000.
Local processing
Calculation runs in your browser and is not uploaded.
GOOD TO KNOW
Common questions
Can a denominator be zero?
No. Zero denominators are rejected.
How many fractions can I enter?
Between 2 and 20.
Can fractions be negative?
Yes; negative numerators or denominators are supported.