Codon Usage Calculator
Analyze codon usage patterns, frequency, and relative synonymous codon usage (RSCU) in coding sequences.
Sequence Input
DNA sequences (T) will be automatically converted to RNA (U)
RSCU (Relative Synonymous Codon Usage)
RSCU = 1.0 means the codon is used at expected frequency. Greater than 1.0 indicates preferential usage, less than 1.0 indicates underuse.
Sequence Summary
12 codons
11 unique codons used
GC Content by Position
1st Position (GC1)41.7%
2nd Position (GC2)25.0%
3rd Position (GC3)83.3%
Total GC Content50.0%
Codon Usage Table
| Codon | AA | Count | Freq% | RSCU |
|---|---|---|---|---|
| AUG | M (Met) | 2 | 16.7% | 1.00 |
| GCC | A (Ala) | 1 | 8.3% | 4.00 |
| AAG | K (Lys) | 1 | 8.3% | 1.00 |
| CUG | L (Leu) | 1 | 8.3% | 6.00 |
| UAC | Y (Tyr) | 1 | 8.3% | 2.00 |
| GAG | E (Glu) | 1 | 8.3% | 2.00 |
| AAA | K (Lys) | 1 | 8.3% | 1.00 |
| UUU | F (Phe) | 1 | 8.3% | 2.00 |
| GGG | G (Gly) | 1 | 8.3% | 4.00 |
| UAG | * (Stop) | 1 | 8.3% | 3.00 |
| CCC | P (Pro) | 1 | 8.3% | 4.00 |
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.