Human codon usage table:

The human codon usage table has been calculated from a set of 19250 human genes from the Ensembl database (Release 57).
Only genes with UniProtKB/SwissProt ID have been included.
In cases of alternative splicing variants, only the longest splice variant has been included.
Genes encoding proteins of length shorter than 99 amino acids have been also removed.

Homo sapiens: 19250 CDS's (11090056 codons)

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fields: [triplet] [frequency: per thousand] ([number])

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TTT 17.1(189379) TCT 15.4(171196) TAT 12.0(132715) TGT 10.6(117458)
TTC 19.5(216388) TCC 17.7(196012) TAC 14.6(161579) TGC 12.2(135489)
TTA 7.8(86682) TCA 12.5(139095) TAA 0.5(5404) TGA 0.9(9518)
TTG 12.9(143507) TCG 4.5(50249) TAG 0.4(4328) TGG 12.1(134648)

CTT 13.3(147569) CCT 17.9(198345) CAT 11.1(123609) CGT 4.5(49921)
CTC 19.2(212802) CCC 20.3(225420) CAC 15.2(168062) CGC 10.5(115976)
CTA 7.2(79488) CCA 17.3(192119) CAA 12.7(140427) CGA 6.2(68859)
CTG 39.4(437308) CCG 7.3(81354) CAG 34.9(387120) CGG 11.7(129331)

ATT 15.8(175259) ACT 13.3(147134) AAT 17.1(190114) AGT 12.6(139465)
ATC 19.9(220634) ACC 18.4(203602) AAC 18.6(206688) AGC 19.9(220505)
ATA 7.5(82922) ACA 15.1(167136) AAA 25.1(278169) AGA 12.0(133268)
ATG 21.3(236510) ACG 6.0(66200) AAG 31.9(353825) AGG 11.9(131616)

GTT 10.9(121302) GCT 18.4(204091) GAT 22.3(246943) GGT 10.6(117456)
GTC 14.0(155761) GCC 28.1(311996) GAC 25.1(278549) GGC 22.3(247607)
GTA 7.1(78882) GCA 16.1(178106) GAA 30.4(336665) GGA 16.5(183190)
GTG 27.6(305878) GCG 7.6(84501) GAG 40.7(451726) GGG 16.5(182999)