ROI計算機 - ベッティング投資収益率
無料ROI計算機。スポーツベッティングの投資収益率と純利益を計算。
この計算機の使い方
- 合計賭け金を入力(すべてのベットの合計)
- 合計返却額を入力(ベット含む勝利支払い)
- (オプション)ベットあたりのメトリクス用に置かれたベット数を入力
- 利益、ROI%、ベットあたりの統計を表示
公式
純利益 = 合計返却 − 合計賭け金
ROI = 純利益 / 合計賭け金 × 100%
平均ベット = 合計賭け金 / ベット数
ベットあたりの利益 = 純利益 / ベット数
5-10%以上の持続的なROIは1000+ベットの強力なスポーツベッターに典型的です;小サンプルで20%を超えるものは通常、スキルではなく分散です。
よくある質問
What is a good ROI in sports betting?
Professional sports bettors typically aim for a long-term ROI of 5-10%. Anything above 3% over a large sample (5000+ bets) is considered exceptional. Sharps often run thinner (2-3%) on bigger volumes; recreational winning bettors run at 5-15% with smaller volumes but more variance.
How is ROI different from yield?
Yield is another name for ROI in betting context. Both measure profit as a percentage of total wagered. The terms are interchangeable — yield is more common in horse racing and European betting, ROI more common in US sports betting and matched betting.
Why does sample size matter?
Short-term ROI is dominated by variance, not skill. A 20% ROI over 50 bets means almost nothing — random variance can produce that easily. To distinguish skill from luck you generally need 1000+ bets with consistent staking and odds before ROI starts to reflect your true edge.
Should I track ROI by sport, market, or bet type?
Yes — track each segment separately. Total ROI may hide that you’re profitable on NHL totals but bleeding money on NBA spreads. Granular tracking is the foundation of any improvement loop in long-term betting.