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Password Generator

Generate secure, random passwords instantly

Password Strength

Strong

Length

16 chars

Types

A-Z, a-z, 0-9, !@#

Score

100%

16
464
4,v?z%1%=m)@emae
Strength: Strong100%

Character Composition

Lowercase7 chars
Numbers2 chars
Symbols7 chars

Security Tips

  • ✓Use a unique password for every account
  • ✓Make passwords at least 12 characters long
  • ✓Use a password manager to store them securely
  • ✓Enable two-factor authentication when available

What You'll Need

HUANCHAIN 50ft 12/3 Heavy Duty Outdoor Extension Cord

HUANCHAIN 50ft 12/3 Heavy Duty Outdoor Extension Cord

$25-$354.5
View on Amazon
HANYCONY Surge Protector Power Strip 8 Outlets 4 USB

HANYCONY Surge Protector Power Strip 8 Outlets 4 USB

$8-$144.8
View on Amazon
Jackery Portable Power Station Explorer 500 518Wh

Jackery Portable Power Station Explorer 500 518Wh

$250-$3504.5
View on Amazon
HUANCHAIN 50ft 12/3 Heavy Duty Outdoor Extension Cord

HUANCHAIN 50ft 12/3 Heavy Duty Outdoor Extension Cord

$25-$354.5
View on Amazon
HANYCONY Surge Protector Power Strip 8 Outlets 4 USB

HANYCONY Surge Protector Power Strip 8 Outlets 4 USB

$8-$144.8
View on Amazon
Jackery Portable Power Station Explorer 500 518Wh

Jackery Portable Power Station Explorer 500 518Wh

$250-$3504.5
View on Amazon

As an Amazon Associate, we earn from qualifying purchases.

Example Calculations

1Strong 16-Character Password (All Options)

Inputs

Length16
UppercaseYes
LowercaseYes
NumbersYes
SymbolsYes

Result

StrengthStrong (score 6/6)
Character Pool Size88 characters
Strength Bar100%

Strength score: +1 (length >= 8) + 1 (>= 12) + 1 (>= 16) + 1 (upper and lower) + 1 (numbers) + 1 (symbols) = 6. Score 5-6 = Strong. Character pool: 26 uppercase + 26 lowercase + 10 digits + 26 symbols = 88 characters.

2Weak 8-Character Password (Lowercase Only)

Inputs

Length8
UppercaseNo
LowercaseYes
NumbersNo
SymbolsNo

Result

StrengthWeak (score 1/6)
Character Pool Size26 characters
Strength Bar25%

Strength score: +1 (length >= 8) + 0 (not >= 12) + 0 (not >= 16) + 0 (no upper+lower combo) + 0 (no numbers) + 0 (no symbols) = 1. Score 0-2 = Weak. Only 26 lowercase letters available, making it much easier to crack.

Frequently Asked Questions

Q

What makes a strong password?

Strong passwords are at least 12 characters, include uppercase, lowercase, numbers, and symbols. Longer is always better - each additional character exponentially increases security.

  • A 12-character password with mixed case, numbers, and symbols has ~78 bits of entropy — considered strong
  • Each additional character adds ~6.5 bits of entropy, making brute-force attacks exponentially harder
  • Avoid dictionary words, names, dates, and keyboard patterns (qwerty, 123456) — these are cracked in seconds
  • A randomly generated 16-character password would take billions of years to crack with current hardware
  • Passphrases (4–5 random words like "correct-horse-battery-staple") are both strong and memorable
Q

Should I use a password manager?

Yes! Password managers help you create and store unique, strong passwords for every account securely. Popular options include Bitwarden, 1Password, and LastPass.

  • Bitwarden is free and open-source — premium features cost only $10/year
  • 1Password ($36/year) is excellent for families with shared vaults and watchtower breach alerts
  • Password managers generate 20–40 character passwords that are impossible to guess or remember
  • Enable 2FA on your password manager itself — it is the master key to all your other accounts
  • The average person has 80–100 online accounts — reusing passwords across them is the #1 security risk
Q

What are ambiguous characters?

Characters like 0/O, 1/l/I that look similar and can cause confusion when typing passwords manually. Exclude them if you need to type passwords often.

  • Common ambiguous pairs: 0 (zero) vs O (letter), 1 (one) vs l (lowercase L) vs I (uppercase i)
  • Also confusing: 5 vs S, 8 vs B, and the backtick (`) vs apostrophe (') in some fonts
  • Excluding ambiguous characters reduces the pool from ~88 to ~72 characters — minimal security impact
  • Only exclude ambiguous characters if you manually type passwords (e.g., Wi-Fi, TV apps, shared devices)
  • If using a password manager with auto-fill, keep ambiguous characters enabled for maximum entropy
Q

How long should my password be?

Minimum 12 characters for most accounts. 16+ characters for important accounts like email, banking, and password managers. Some experts recommend 20+ characters.

  • 8 characters: crackable in hours with modern GPUs — no longer considered safe for any account
  • 12 characters: strong for most accounts — would take centuries to brute-force with current technology
  • 16 characters: recommended for email, banking, and cloud accounts that protect sensitive data
  • 20+ characters: ideal for master passwords and password manager vaults
  • NIST (National Institute of Standards and Technology) recommends minimum 8 but strongly encourages 15+
Password LengthCharacter Pool 26Pool 62 (a-z, A-Z, 0-9)Pool 88 (all types)
8 characters2 hours1 day3 weeks
12 characters200 years12,000 years7 million years
16 characters15 billion years700 trillion yearsHeat death of universe
20 charactersEffectively infiniteEffectively infiniteEffectively infinite

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Last Updated: Mar 26, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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