AT Content Calculator

Calculate AT percentage instantly with real-time visualization. Analyze adenine-thymine ratios, nucleotide composition, and sequence stability.

What is AT Content?

AT content is the percentage of adenine and thymine in DNA. Higher AT content indicates lower thermal stability and is common in regulatory regions and AT-rich genomes.

How to Use This AT Calculator

Quick guide to get results:

  1. Paste your DNA sequence
  2. View instant chart visualizations
  3. Check detailed statistics table

When to Use

This tool is useful for:

  • Analyzing AT-rich regions
  • Identifying promoters and regulatory elements
  • Studying genome composition
  • Evaluating sequence stability

Example Input

Sample AT-rich sequence:

AAAATTTTAAAATTTT

Try with your own sequence or use the Example button.

Example Output

Expected output format:

AT CONTENT: 100% GC CONTENT: 0% AT-rich sequence (low stability)

Results can be copied or downloaded.

FAQ

Q: What is a good AT content level?
A: It varies by organism. Mammals typically have 40-60% AT content, while some parasites can have 70-80%.

Q: How does AT content affect stability?
A: Higher AT content means lower stability, as A-T base pairs have 2 hydrogen bonds vs 3 for G-C pairs.