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Calcimator

Password Generator

Generate secure random passwords with customizable length and character sets. See password strength and entropy.

Inputs

Results

Generated Password

#R[2[P>r@Av>3%Mp

Strength

Very Strong

Entropy103.35 bits
How to Use This Calculator
  1. Set the Password Length — 16+ characters is recommended for strong security.
  2. Toggle Include Uppercase, Include Lowercase, Include Numbers, and Include Symbols to define your character set.
  3. The Generated Password field shows a random password matching your criteria.
  4. Check the Entropy value in bits — aim for 80+ bits for high-security passwords.
  5. Review the Strength rating (Weak, Moderate, Strong, Very Strong) and regenerate as needed by adjusting length or character types.

What each input means

Password Length
Length of password (4-128 characters)
Include Uppercase
1=Yes, 0=No

How this is calculated

Formula

Random selection from character set

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Password Length = 16, Include Uppercase = 1, Include Lowercase = 1, Include Numbers = 1 = 5 input(s) provided
  2. Calculate Generated Password
    Generated Password
    #R[2[P>r@Av>3%Mp = #R[2[P>r@Av>3%Mp
  3. Calculate Strength
    Strength
    Very Strong = Very Strong
  4. Calculate Entropy
    Entropy
    103.35090589819676 = 103.35090589819676

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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