Password Strength / Entropy Calculator
Calculate entropy and crack time from password length and character set.
characters
Result
78,8383 bit
Entropy: 78,8383 bits (Medium)
Result in all units
Step-by-step solution
entropy = length × log₂(N)
What Is Password Entropy?
Password entropy measures a password's strength against guessing in bits. It increases with length and the variety of characters used.
How is it calculated?
How Is It Calculated?
Entropy (bits) = length × log₂(character pool)
- Enter the password length and the types of characters used.
In general, 60 bits and above is considered strong.
Frequently Asked Questions
Is length or complexity more important?
Length is the factor that increases entropy the most; a long password with varied characters is the strongest.