Password Strength Calculator
Estimate password entropy in bits and crack time at a trillion guesses per second.
Entropy (bits)
78.84
Breakdown
- Est. offline crack time
- 8567.35 years
- Character pool size
- 95
Last updated:
FAQ
How much entropy is strong?
Around 75+ bits is considered strong against offline attacks. Length beats complexity: a 16-character mixed password usually outperforms a shorter one with symbol substitutions.
Does adding symbols really help?
Less than adding length. Each symbol grows the pool to 95 characters, but every extra character multiplies guesses — a 16-char passphrase beats a short symbol-soup password.
Why does reuse weaken a password?
Breaches leak passwords in bulk. If the same password is used elsewhere, attackers replay it automatically — unique passwords per site are essential.
Related Calculators
Tip Calculator
→Calculate the tip amount and total bill per person, with smart service-quality presets and rounding options.
Split the Bill Calculator
→Split a bill fairly between friends, with optional tip and separate handling of shared vs personal items.
GPA Calculator
→Calculate your grade point average on a 4.0 scale from course grades and credit hours, with cumulative GPA support.
Grade Calculator
→Find what you need on the final exam to reach your target course grade, based on current grade and exam weight.