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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
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
2nd Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
3rd Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
4th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
5th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
6th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
7th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
8th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
9th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
10th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
11th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
12th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
13th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
14th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
15th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
16th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
17th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
18th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
19th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
20th Amino acid
Alanine(Ala, A)
Arginine(Arg, R)
Asparagine(Asn, N)
Aspartic acid(Asp, D)
Cysteine(Cys, C)
Glutamine(Gln, Q)
Glutamic acid(Glu, E)
Glycine(Gly, G)
Histidine(His, H)
Isoleucine(Ile, I)
Leucine(Leu, L)
Lysine(Lys, K)
Methionine(Met, M)
Phenylalanine(Phe, F)
Proline(Pro, P)
Serine(Ser, S)
Threonine(Thr, T)
Tryptophan(Trp, W)
Tyrosine(Tyr, Y)
Valine(Val, V)
Calculate
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