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Password Strength (Entropy Bits) — result sheet
Guessing resistance of a random password from alphabet and length.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: bits = length x log2(alphabet); guesses = 2^bits.
Each random character multiplies possibilities by the alphabet size. Human-chosen words fall far below this math; use a manager-generated string for the full value.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Alphabet size — 26 lowercase, 52 mixed-case, 62 + digits, 94 all printable.; minimum 2; maximum 256
- Password length — minimum 1; maximum 256
Worked example
| Input | Value |
|---|---|
| Alphabet size | 62 |
| Password length | 12 |
71.45 bits.
Assumptions and limits
- Uniformly random characters.
- Whole alphabet >= 2 and length >= 1.
- Theoretical guessing math, not a security guarantee.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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