bcrypt Cost & Hash Time Calculator
Pick a bcrypt cost factor with eyes open — see how long it takes on real hardware.
We benchmark bcrypt against the cost factors in your browser, then project the auth-endpoint impact at your traffic level.
bcrypt times double per cost factor. The right value is the largest you can afford on your login path — under ~250 ms typically.
Runs entirely in your browser — nothing you enter is sent to a server.
Need this for real, on your stack?
These free tools are a taste of how we think. We’re a senior software team across Romania & Pakistan that ships deep technical work — platforms, infra, data and the gnarly bits in between.
Talk to our engineers →The trade-off
Each +1 to cost doubles the hashing time. The right value is "the largest you can afford on your login path." Sub-100ms is comfortable for users; over ~500ms gets noticeable.
Built by WeWorkWorldwide — a senior software team in Romania & Pakistan that ships deep technical work. Need this turned into something production-grade for your stack? Talk to our engineers →