Protein Molecular Weight Calculator

Calculate molecular weight, composition, and properties

Enter protein sequence:

Molecular Weight Analysis

Protein Molecular Weight Calculator

Our free protein molecular weight calculator computes the exact molecular weight of protein sequences using monoisotopic masses of amino acids. The protein MW calculator is an essential tool for biochemists, protein researchers, and bioinformatics professionals working with protein sequences. Understanding protein molecular weight is crucial for gel electrophoresis, mass spectrometry, and protein characterization.

The molecular weight calculator provides comprehensive analysis including amino acid composition, individual amino acid counts and percentages, and hydrophobic percentage calculation. These parameters are fundamental in protein analysis and help researchers understand protein structure, function, and properties. Use our main sequence analyzer for additional protein analysis features, or explore our DNA translation tool to convert DNA sequences to proteins before calculating molecular weight.

All calculations are performed instantly in your browser using precise monoisotopic masses - no data is sent to any server, ensuring complete privacy. The protein molecular weight calculator supports sequences of any length and provides accurate results for research, educational, and professional applications in biochemistry, proteomics, and protein analysis.

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