Biology
DNA to mRNA Converter
See what a coding DNA sequence becomes after transcription and translation: mRNA length, codons, amino acids and rough protein mass.
Your inputs
Change any value to update the result instantly.
mRNA length
900 nt
Codons (including stop)
300
Amino acids in protein
299
Estimated protein mass
32.89 kDa
During transcription the coding strand's T becomes U in mRNA, which is read in triplets from the start codon (AUG) to a stop codon. Real proteins vary around the 110 Da-per-residue average.
What this calculator does
Shows what a coding DNA sequence becomes after transcription and translation: mRNA length, codons, amino acids and rough protein mass.
What your result means
mRNA length equals the coding length; codons are length ÷ 3; one codon is the stop signal and codes for no amino acid.
Formula and working
mRNA length = coding length; codons = length ÷ 3; amino acids ≈ codons − 1 (stop codon); protein mass ≈ amino acids × 110 Da
- 1
Collect the inputs
Coding DNA sequence length = 900 nt
- 2
Apply the formula
mRNA length = coding length; codons = length ÷ 3; amino acids ≈ codons − 1 (stop codon); protein mass ≈ amino acids × 110 Da
- 3
Result
mRNA length = 900 nt
Frequently asked questions
Symbols and assumptions
- nt
- Nucleotides
- codon
- Three-nucleotide unit read by the ribosome
- kDa
- Kilodaltons of protein mass
- • The sequence begins at a start codon and ends with one stop codon.
- • An average amino-acid mass of about 110 Da.
Sources and review
Reviewed 2026-09-22 · Next review 2027-09-22
- • Introns, untranslated regions and post-translational processing are not modelled; real protein mass varies by composition.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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