Free Password Strength Calculator

About the Password Strength

Password entropy, strength score, crack time estimate and improvement tips. The Password Strength is designed to help developers, network engineers, and IT professionals with programming, networking, and technical problem solving.

Instead of complex manual computation, you can use this tool to get instant, accurate results. Simply enter your values to see a step-by-step breakdown of how the answer was reached.

This utility works directly in your browser without any sign-ups or downloads.

How to Use the Password Strength

1. 1Enter your values into the Password Strength input fields above.
2. 2Review the input labels to ensure you are using the correct units.
3. 3Click the "Calculate" button to get your instant result.
4. 4Use the step-by-step breakdown to understand how the result was calculated.
5. 5Export or copy your result to use in reports or share with others.

Example Use Cases

Tips & Best Practices

• ✓A 12-character password with mixed case, numbers and symbols would take centuries to crack by brute force.
• ✓Double-check your input units before calculating — using the wrong unit is the most common source of errors.
• ✓Bookmark this Password Strength for quick access next time you need it.
• ✓Use the share button to send your results to a colleague or save them for later reference.

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