Nucleotide Composition Calculator

Nucleotide Composition Calculator: Calculate DNA/RNA Nucleotide Composition

Calculate the nucleotide composition of a DNA or RNA sequence. Select the sequence type (DNA or RNA), input your sequence (using A, T, C, G for DNA; A, U, C, G for RNA) using the keypad or keyboard, and click Calculate to get the nucleotide counts and percentages.

How It Works

Select the sequence type (DNA or RNA) using the dropdown, enter your sequence using the keypad or keyboard, then click “Calculate” to see the nucleotide composition. The calculator displays the total sequence length, nucleotide counts, and percentages in a table.

Nucleotide Composition Calculator

Result

Total Sequence Length:

Steps

About Nucleotide Composition Calculator

The Nucleotide Composition Calculator computes the composition of a DNA or RNA sequence, providing the count and percentage of each nucleotide (A, T/U, C, G). It’s a simple tool for molecular biology research and sequence analysis.

How to Use

Select the sequence type (DNA or RNA) from the dropdown.
Enter your sequence using the keypad buttons (A, T/U, C, G) or keyboard (case-insensitive).
Click the “Calculate” button to compute the nucleotide composition. The page will scroll to the result.
Click the “Clear” button to reset the sequence input and results.
The total sequence length, nucleotide counts, and percentages will be displayed in a table, along with detailed step-by-step calculations below.

Formulas

Nucleotide Count:

Count of Nucleotide = Number of occurrences of the nucleotide in the sequence

Nucleotide Percentage:

Percentage = (Count of Nucleotide / Total Sequence Length) × 100

Important Notes

The sequence must contain only valid nucleotides for the selected type: A, T, C, G for DNA; A, U, C, G for RNA (case-insensitive). Invalid characters or empty sequences will trigger an error.