How to Use the Nucleotide Counter
Step 1: Enter or paste your DNA or RNA sequence in the input box. The tool accepts both DNA (A, T, G, C) and RNA (A, U, G, C).
Step 2: Click Count Nucleotides. Results appear instantly with large colored cards for each base.
Step 3: Below the cards you see a color coded version of your sequence where each base type is highlighted in its unique color — green for A, blue for T, orange for G, red for C.
About Nucleotide Counting
Counting individual nucleotides is a fundamental step in sequence analysis. Knowing the exact count and percentage of each base helps in understanding sequence composition, designing experiments, and verifying sequence data.
Count each base individually: A, T, G, C
Percentage = (Base count / Total) × 100
// Example: ATGCATGC (8 bases)
A = 2 → 25.0%
T = 2 → 25.0%
G = 2 → 25.0%
C = 2 → 25.0%
Color Code Legend
Each nucleotide is displayed in a unique color for easy identification: Adenine (A) in green, Thymine (T) in blue, Guanine (G) in orange, Cytosine (C) in red, and Uracil (U) in purple for RNA sequences.