Skip to main content
Calcimator

Security Tools Calculator

Comprehensive security calculator for password strength analysis, entropy calculation, crack time estimation, and hash algorithm comparison. Essential for security-conscious users and developers.

Progress0%

Step 1 of 4

How to Use This Calculator
  1. Select Tool Type: Password Strength Analysis to evaluate an existing pattern, Password Generation Parameters to design secure credentials, or Hash/Encryption Info to compare algorithms.
  2. For strength analysis, set the Password Length and toggle the character types you use (Lowercase, Uppercase, Numbers, Symbols).
  3. Review the Entropy (bits), Strength Rating, and Time to Crack for both online (throttled) and offline (GPU) scenarios.
  4. For generation parameters, set your Target Entropy in bits (80+ for high security) and Preferred Length to see which charset and minimum length meets your goal.
  5. For hash info, select an algorithm (MD5, SHA-1, SHA-256, SHA-512, bcrypt, Argon2) and check Security Status and Recommended Use before implementing.
  6. Use the crack-time comparison table to see the impact of attack speed on password security.

What each input means

Tool Type
Calculation mode to use.
Password Length
Length of the shape or side.
Lowercase (a-z)
Include lowercase letters.
Uppercase (A-Z)
Include uppercase letters.
Numbers (0-9)
Include numbers.
Symbols (!@#$...)
Include special characters.
Avoid Common Patterns
Avoids dictionary words, sequences, repetition.
Target Entropy (bits)
Recommended: 80+ bits for high security.
Include Ambiguous Chars
0, O, 1, l, I, |

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Tool Type = 0, Password Length = 12, Lowercase (a-z) = 1, Uppercase (A-Z) = 1 = 11 input(s) provided
  2. Calculate Strength Rating
    Strong = Strong
  3. Calculate Online Attack Time
    Online Attack Time = crackTimes.onlineThrottled
    7.5e+4 billion years = 7.5e+4 billion years
  4. Calculate Entropy
    Entropy = 8
    78.7 = 78.7
  5. Calculate Character Set Size
    Character Set Size
    94 = 94

Engine last updated . Checked against 4 independently-derived tests — how we verify calculators.

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Technology & Computing

Password Strength Calculator

Check how strong your password could be based on length and character types. See estimated time to crack.

Cybersecurity

Password Generator

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

Cryptography & Security

Password Entropy Calculator

Calculate password entropy, brute force time, and security strength. Measure password complexity and cryptographic strength.

Technology & Computing

Hash Properties Calculator

Compare cryptographic hash function properties. See output size, collision resistance, brute force time, and security status for MD5, SHA-1, SHA-256, SHA-512, and bcrypt.

Technology & Computing

Binary/Hex/Decimal Converter

Convert a decimal number into its binary, octal, and hexadecimal representations. Includes bit count, byte size, and ASCII character lookup.

More in Technology & Computing.