Bankroll calculator: unit size and risk of ruin
1win is licensed under Curaçao 8048/JAZ and has 400,000+ registered players managing their bets every day. This bankroll calculator recommends a unit stake size based on your total funds and risk tolerance, and estimates the probability of ruin before you hit your target. 登録する with プロモコード XLBONUS to put bankroll discipline to work from day one.
Bankroll management calculator
この計算機の使い方
The fundamental rule of bankroll management is never to risk so much on a single bet that a losing streak can wipe you out. The recommended unit stake is a fixed percentage of your total bankroll. Conservative bettors use 1-2%; aggressive bettors go as high as 5%.
The number of bets in bankroll equals total bankroll divided by unit stake. At 2% per bet with a 500-unit bankroll, you have 50 bets before the bankroll is exhausted. This buffer is essential for surviving the inevitable losing runs that all bettors face regardless of long-run edge.
Expected value per bet = (win rate x (decimal odds - 1)) - (1 - win rate). At 52% win rate on even-money bets (2.00 decimal), EV = (0.52 x 1.00) - 0.48 = 0.04 per unit staked, or 4% edge. A positive EV confirms the strategy has merit over a large sample.
Risk of ruin (RoR) estimates the probability of losing the entire bankroll before reaching the target. The approximation used here is: RoR = ((1-edge)/(1+edge)) ^ (bankroll / unit), where edge = EV / 1. This is a simplified model; actual RoR depends on the distribution of individual bet outcomes.
ユニットステークを下げると破産リスク(RoR)は大幅に減少しますが、バンクロールの成長も遅くなります。普遍的に最適な設定はありません：エッジ推定に対する自信とリスク許容度によります。ほとんどのプロのベッターは、知覚エッジに関わらず1ベットあたり1%から3%を使用します。
This calculator uses flat stakes (same amount every bet). Kelly criterion staking adjusts unit size dynamically based on edge. The ケリー基準計算機 on this site lets you compare both approaches.
1winでこれを使う理由
1win serves 400,000以上のプレイヤー across 40,000+ daily markets. Good bankroll management turns a long-term edge into consistent growth. 登録する with XLBONUS to claim your first 入金ボーナス and add to your starting bankroll.
よくある質問
What percentage of bankroll should I bet per game?
プロのベッターの多くは1回あたり1〜3%を推奨しています。1%は非常に保守的、5%はハイリスクです。1回あたり10%を超えると、プラスのエッジがあっても破産リスクが劇的に上昇します。
What is risk of ruin?
Risk of ruin is the probability of losing your entire bankroll before reaching your profit target. 低er unit stakes and larger bankrolls reduce this probability significantly.
How many bets do I need for a reliable edge estimate?
A minimum of 500-1,000 settled bets is generally needed to assess whether an apparent edge is real or attributable to variance. Smaller samples are not statistically reliable.
Should I use flat stakes or Kelly staking?
フラットステークはシンプルでエッジの過大評価を防ぎます。Kellyステーキングは理論的に最適ですが、正確な確率推定が必要です。初心者は1ベットあたり1〜2%のフラットステークから始めてください。
Does a 入金ボーナス change my bankroll management?
ボーナス funds typically come with ウェージャリング条件. Factor only the portion of funds you consider truly yours when calculating unit stakes. Do not inflate your effective bankroll with locked bonus money.