GC Content Calculator

Calculate the GC content of a DNA sequence.

DNA Sequence

GC Content Result

Enter a DNA sequence to calculate GC content.

Description

GC content is the percentage of nitrogenous bases in a DNA sequence that are either guanine (G) or cytosine (C). It is a key indicator of DNA stability, melting temperature, and is used in PCR primer design and taxonomy.

How to use

Paste or type a DNA sequence into the input field. The GC percentage and base counts are computed instantly. Only A, C, G, T (case-insensitive) are counted; other characters are excluded from the percentage.