Technology & Computing
Password Entropy & Brute-Force Cracking Time Calculator
Calculate a password's entropy in bits and estimate worst-case brute-force cracking time at a given guess rate.
Your inputs
Change any value to update the result instantly.
Password entropy
71.4504 bits
Total combinations (approx.)
3,22,62,66,76,23,97,87,60,00,000
Average time to crack (years)
51,117.1122 years
Average time to crack (seconds)
16,13,13,33,81,198.9382 seconds
Entropy assumes a truly random password; predictable patterns and dictionary words drastically reduce real-world security.
Formula and working
Entropy (bits) = length × log2(charset size); Cracking time = 2^entropy ÷ (2 × guesses/sec)
- 1
Collect the inputs
Character set = 62; Password length (characters) = 12; Attacker guesses per second = 1,000,000,000
- 2
Apply the formula
Entropy (bits) = length × log2(charset size); Cracking time = 2^entropy ÷ (2 × guesses/sec)
- 3
Result
Password entropy = 71.4504 bits
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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