Coin Flip fair Ruin

Risk of Ruin Calculator 50%

Risk of Ruin Calculator. For simple win / lose calculations and even money payoffs only.

works with UNITS only

The probability is an easy formula. Starting bankroll / target. 10/15 in default calculator.

(trying to turn starting bankroll into target) Simple as that when H and T probability = 50%.

Average number of trials for either success or ruin is simple too. Bankroll units * gain units.

A bankroll UNIT is simply the $ bankroll divided by the $ bet (same bet every time (called FLAT BETTING)).

example: $10 bankroll and $1 bets = starting bankroll = 10 UNITS.

example: $100 bankroll and $10 bets = starting bankroll = 10 UNITS.

example: $150 target and $10 bets = target (goal) = 15 UNITS.

Much easier to think in UNITS than actual $ wagered.