EZ
Virtual
Tools
Dashboard
All Calculators
Bankroll Requirements Calculator
Calculate the minimum bankroll needed for a given edge and acceptable risk of ruin.
Desired Risk of Ruin (%)
?
The maximum probability of going broke you are willing to accept. Professional players typically use 1-5%.
Edge / Advantage (%)
?
Your expected win rate advantage over the house.
Standard Deviation (per unit bet)
?
SD per unit. Even-money ~1.0, blackjack ~1.15, sports betting varies by odds.
Bet Size ($)
?
Your planned standard bet amount to convert units to dollars.
Calculate Bankroll Requirements
Required Bankroll
Minimum Bankroll (units)
Minimum Bankroll ($)
Confidence Level
Bankroll for Various Risk Levels
Risk of Ruin
Units Needed
Bankroll ($)
Recommendation
Formula:
Bankroll (units) = -ln(RoR) × SD² / (2 × edge)
Derived from SD-Adjusted RoR formula: RoR = e^(-2 × edge × units / SD²)