Password Crack Time Calculator
Fill in the values and the answer updates as you type.
How the Password Crack Time Calculator works
Average time = half of all possible combinations ÷ guesses per second. Combinations = character set size ^ length. Real attackers use word lists and leaked passwords, so truly random and long passwords matter most. Example: with Password length 12 chars, Characters used Upper, lower, digits (62), and Guesses per second 10000000000, the result is Average time to crack = 5,112 years; Possible combinations = 3.23e+21; Entropy (bits) = 71.5.
Inputs and results
The Password Crack Time Calculator takes 3 inputs and gives 3 results.
What you enter
- Password length (chars) — starts at 12.
- Characters used — starts at Upper, lower, digits (62). Choose from: Digits only (10), Lowercase (26), Upper and lower (52), Upper, lower, digits (62) and All keyboard symbols (94).
- Guesses per second — starts at 10000000000.
What you get
- Average time to crack
- Possible combinations
- Entropy (bits)
Example: Password Crack Time Calculator with the starting values
With password length 12 chars, characters used Upper, lower, digits (62) and guesses per second 10000000000, the calculator returns:
| Average time to crack | 5,112 years |
|---|---|
| Possible combinations | 3.23e+21 |
| Entropy (bits) | 71.5 |
Change any value above and the results update straight away.
Password Crack Time Calculator FAQ
How do I use the Password Crack Time Calculator?
Enter password length, characters used and guesses per second in the fields, then read average time to crack, possible combinations and entropy (bits) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Password Crack Time Calculator calculate?
Estimated brute-force time for a password. It returns average time to crack, possible combinations and entropy (bits) from the 3 values you provide.
What values does the Password Crack Time Calculator start with?
It opens with password length 12 chars, characters used Upper, lower, digits (62) and guesses per second 10000000000 so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Password Crack Time Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Password Crack Time Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.