DNA Base-Pair Percentage Calculator

Calculate DNA nucleotide percentages using counts of A, T, G, and C bases.

Adenine count

Thymine count

Guanine count

Cytosine count

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Adenine—

Thymine—

Guanine—

Cytosine—

GC content—

How this calculator works

Calculate DNA nucleotide percentages using counts of A, T, G, and C bases.

Use consistent units and carefully reviewed inputs. Results are estimates for education, laboratory planning, and general informational use.