Bcrypt Cost Factor Calculator

A real measured benchmark on your own hardware plus a target hash time, turned into the bcrypt cost factor that actually hits it.

Benchmark bcrypt at any cost factor on your actual server first (most bcrypt libraries can time a single hash call) - the right cost depends entirely on your hardware, not a number from a blog post.

Measured time

At cost factor

Target hash time

Cost 12

~260ms per hash on your hardware

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