Fractions & Math Manipulation Tools
Least Common Denominator Calculator
Find the least common denominator of a set of numbers by prime factorisation.
Loading tool…
What is LCD?
The LCD is the LCM of the denominators. Prime factorisation makes it easy: take the highest power of every prime that appears in any of the numbers.
How it works
We factor each number by trial division, collect the highest power of each prime, and multiply them to get the least common denominator.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Type or paste any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
Nothing is uploaded — every tool in this category runs entirely in your browser.