// multi-utility computation suite · offline · instant · precise
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│ [c] calcalyst_ │
│ computation suite │
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build.sec-password-entropy Calculator
Calculates password entropy in bits from character set size and length, and estimates time to crack at a given hash rate. A 12-character random alphanumeric password has ~71 bits of entropy — adequate against GPU cracking at 2024 speeds, but a 16-character passphrase provides a comfortable margin.
Inputs
Length
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
Charset
Reference formula or conversion factor shown for context.
Guesses S
Reference formula or conversion factor shown for context.
Results
entropy
Sample size or count used in the calculation.
combinations
The value at the specified point or condition.
avg crack time
The computed duration or time value.
charset
Reference formula or conversion factor shown for context.