About this tool
Measure how much information (Shannon entropy) a text contains per character and per word.
H = −Σ p·log₂(p), where p is the share of each distinct character (or word). The maximum is log₂ of the number of distinct symbols.
Formula: H = −Σ p·log₂ p
Example: Text = aabb → Entropy per character (bits) = 1, Total information (bits) = 4.
Entropy of a sample text is not the strength of a password; use the Password Generator’s strength check for that. The text stays in your browser.
Quick steps
- Enter your values — every field shows its unit.
- Press Calculate (or Try an example to see how it works).
- Read the results and copy them if you need them elsewhere.
The calculation runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Text Entropy Calculator work?
H = −Σ p·log₂(p), where p is the share of each distinct character (or word). The maximum is log₂ of the number of distinct symbols.
What should I keep in mind?
Entropy of a sample text is not the strength of a password; use the Password Generator’s strength check for that. The text stays in your browser.
Is my data sent anywhere?
No. The numbers stay on your device; the page only shows the result.