Codon Table Lookup

Enter any 3-letter DNA or RNA codon and instantly see the encoded amino acid, its abbreviations, and properties.

Use the Codon Table Lookup

Enter a Codon

Accepts 3 nucleotides in DNA (A T G C) or RNA (A U G C) notation.

Standard Genetic Code — All 64 Codons

Codon Amino Acid 1-Letter

Summary

The Codon Table Lookup tool decodes any 3-nucleotide DNA or RNA sequence into its corresponding amino acid using the standard genetic code. It accepts both DNA (using T) and RNA (using U) notation and instantly returns the amino acid name, single-letter code, 3-letter abbreviation, and key biochemical properties. The complete 64-codon table is also displayed for reference.

How it works

  1. Type or paste a 3-letter codon (e.g., ATG or AUG) in the input box.
  2. The tool automatically normalizes DNA T to RNA U for lookup.
  3. The matching amino acid (or Stop signal) is retrieved from the standard genetic code table.
  4. The result shows the full name, 1-letter code, 3-letter abbreviation, polarity, and charge.
  5. Browse the full 64-codon table below for any codon at a glance.

Use cases

  • Verify codon–amino acid assignments during molecular biology coursework.
  • Quickly check the start codon (ATG / AUG → Methionine) or stop codons.
  • Convert a sequence of codons to an amino acid string for protein translation.
  • Identify synonymous codons (codon degeneracy) for a given amino acid.
  • Reference biochemical properties such as polarity and charge while designing experiments.
  • Support genetics and biochemistry exam preparation.

Frequently Asked Questions

Last updated: 2026-09-30 · Reviewed by Nham Vu