GC% calculator | Momchi's Genetics Tools™

Paste your DNA/RNA sequence below to calculate overall GC% and view local GC% in graphs and heatmaps.

GC% Heatmap Representation

This tool analyzes DNA or RNA sequences to calculate the guanine–cytosine (GC) content. Results are presented as both a precise percentage value and two visual representations: a line graph showing GC% variation across the sequence, and a color-coded heatmap highlighting local GC-rich and GC-poor regions.