Password Crack Time Calculator
Estimate time to brute-force a password given entropy and guess rate.
Simplified estimate; real attack times vary by method and hardware.
Examples
- Entropy 40 with 1e6 guesses/sec ⇒ 0.017 years
- Entropy 60 with 1e9 guesses/sec ⇒ 18 years
FAQ
Why divide by 2?
On average, half the keyspace is searched before success.
Is entropy in bits?
Yes, typically calculated from password length and character set.
Additional Information
No additional information available.