How this bankroll calculator works
For cash games, the calculator treats your typical buy-in as the unit at risk. The default is 100 big blinds, but you can enter the amount you actually buy in for. That matters because a €10,000 bankroll at €2/5 is not the same thing as 20 full €500 buy-ins if you normally sit with €300.
For tournaments, the unit is your average buy-in. A schedule of €25 daily events needs a different bankroll than a schedule where most bullets are €250 and re-entries are common.
Bankroll assumptions used
Cash games use 20 buy-ins for aggressive, 40 for standard, and 60 for conservative play. Online cash defaults are more conservative because online players often play more hands, more tables, and tougher player pools. Tournaments use 75, 150, and 250 average buy-ins.
These are working rules, not laws. A strong winner in a soft live game may accept more risk. A player with a small edge, a high-variance style, or no outside income should usually protect the bankroll more carefully.
Example
If you have €7,600 and play a €200 cash-game buy-in, you have 38 buy-ins. Under the standard live cash setting, this calculator recommends about 40 buy-ins, or €8,000. That is close, but still an aggressive bankroll for that game.
Bankroll management does not stop you from losing. It gives you a way to survive normal poker variance long enough for your actual edge to show up.