How fast can GPUs crack passwords?

A single RTX 4090: MD5: 164 billion hashes/sec, SHA-256: 23 billion/sec, bcrypt (cost 12): 184,000/sec, Argon2: much slower depending on memory. An 8-character MD5 password (95 chars) cracks in under 1 second. bcrypt at cost 12 takes years.

Why does hashing algorithm matter for password storage?

MD5 and SHA-1/256 crack at billions per second per GPU. bcrypt, scrypt, and Argon2 are designed to be slow (100K-1M hashes per second) and memory-hard. Always use bcrypt, scrypt, or Argon2 for password storage.

Brute Force Password Crack Time Calculator

Estimate time to brute force crack a password given hash type, GPU count, and password character set. Compare bcrypt, SHA-256, MD5 crack rates.

Networking

Algorithms

Binary & Number

Systems

Dev Metrics

IP Subnet Calculator

IP Address

CIDR Prefix

Network

192.168.1.0

Broadcast

192.168.1.255

Subnet Mask

255.255.255.0

First Host

192.168.1.1

Last Host

192.168.1.254

Usable Hosts

254

Binary breakdown:

IP: 11000000.10101000.00000001.00000000

Mask: 11111111.11111111.11111111.00000000

Net: 11000000.10101000.00000001.00000000

How to Use

Enter the values for the patient or scenario you are assessing. Estimate time to brute force crack a password given hash type, GPU count, and password character set. Compare bcrypt, SHA-256, MD5 crack rates. Use the brute force crack time result to inform your clinical assessment.

Related Calculators

bcrypt Cost Factor

AI & Technology

Argon2 Memory Cost