Password Entropy Calculator
Calculate password entropy and estimated crack time. Understand how long it would take to brute-force your password at various attack speeds.
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Applications
Evaluate password strength for personal security, compliance requirements, and security audits. Understand how different character sets and lengths affect crack times.
The Formula
Entropy (E) = L × log₂(N), where L is password length and N is the character set size. Total combinations = N^L. Crack time assumes average case (half the keyspace).
Fun Fact: A password with 60 bits of entropy would take the world's fastest supercomputer longer than the age of the universe to crack!
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