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GCD and LCM Calculator — Greatest Common Divisor & Least Common Multiple

Free GCD and LCM calculator. Find the Greatest Common Divisor (GCD) and Least Common Multiple (LCM) of up to 5 numbers, with step-by-step explanation.

★★★★★4.8(1,247 ratings)
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GCD (Highest Common Factor)
6
LCM (Lowest Common Multiple)
72
🆓 100% Free🔒 Runs in your browser Instant results📱 Works on any device
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How to Use This GCD and LCM Calculator

  1. Enter two or more numbers separated by commas.
  2. See the GCD and LCM instantly.
  3. Step-by-step Euclidean algorithm shown.

Common Use Cases

  • Simplify fractions using GCD
  • Find the LCM for adding fractions
  • Solve math homework problems

Frequently Asked Questions

This tool is for informational purposes only. Read our disclaimer.

Need help with this tool? help@bodhins.com

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