Protein Molecular Weight
Calculate Protein Molecular Weight instantly with the exact formula and a worked example.
Protein Molecular Weight
Number of amino acid residues
Protein molecular weight
33,000Da
In kilodaltons
33kDa
Coding DNA length
903bp
Mass of 1 nmol of protein
33µg
More about: Protein Molecular Weight
What it calculates
The “Protein Molecular Weight” calculator computes Protein molecular weight in Da from 1 parameter: number of amino acid residues.
A lab calculation in biology and molecular biology.
Example calculation
With parameters Number of amino acid residues = 300 the result is 33,000 Da (Estimate based on an average residue mass of ≈ 110 Da; the exact mass depends on composition).
How to use
- Enter number of amino acid residues — each field above is adjustable with a slider.
- Protein molecular weight (Da) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Protein Molecular Weight calculated?
The Protein Molecular Weight calculator computes Protein molecular weight (in Da) from number of amino acid residues. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Protein Molecular Weight calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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