Password Strength & Crack Time
Result
Password Strength & Crack Time — free online calculator.
Formula
- Password Strength & Crack Time calculates its result from Password length, Charset size. It uses the formula Calculated with the verified ST Calculator runtime.. Change any input to recalculate the result instantly.
- The main inputs are Password length, Charset size. Enter them in the units and format shown in the calculator.
- Keep comparable quantities in compatible units whenever the formula combines or compares them.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Password Strength & Crack Time
- Password length: 12
- Charset size: 94
Using Password length = 12, Charset size = 94, the calculated result is Search space: 4.7592031481e+23 | Entropy bits: 78.6550662201.
Sample result: Calculating…
Frequently asked questions
What does the Password Strength & Crack Time calculate?
Password Strength & Crack Time — free online calculator.
Which values should I enter?
Enter Password length, Charset size using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Under an ideal independent and uniformly random password-choice assumption, search-space size = S^L and theoretical Shannon entropy = L × log2(S) bits, where L is password length and S is available character-set size. Requires an integer L ≥ 0 and S > 1. This does not calculate actual cracking time and should not be treated as an audit of a human-chosen password or a guarantee of security..
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.