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Online calculator for protein molecular weight

Use our online calculator to determine protein mass.

You can add up to 20 amino acids.

1st Amino acid

2nd Amino acid

3rd Amino acid

4th Amino acid

5th Amino acid

6th Amino acid

7th Amino acid

8th Amino acid

9th Amino acid

10th Amino acid

11th Amino acid

12th Amino acid

13th Amino acid

14th Amino acid

15th Amino acid

16th Amino acid

17th Amino acid

18th Amino acid

19th Amino acid

20th Amino acid

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