Bankroll Analytics
Track every wager, analyze yield, and monitor your path to profitability with detailed metrics. Eliminate emotional bias by tracking your ROI, win rate, and net profit with scientific precision.
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Yield vs ROI
Professional bettors focus on **Yield** to understand the efficiency of their capital. While profits fluctuate, a positive yield over 500+ bets is the true signature of a mathematical edge over the market.
Sample Size Matters
Don't celebrate too early or panic after a loss. Statistical significance in betting usually requires a minimum of **200 entries** to separate variance from skill.
Bankroll Management for Sports Bettors
Bankroll management is the discipline of controlling how much you bet relative to your total available funds. It is the difference between a profitable betting system that generates long-term gains and the same system that goes broke due to variance. Even a 10% edge can bankrupt an undisciplined bettor; even a 2% edge can compound into significant wealth with proper staking.
The most common professional approach is flat unit staking β betting the same amount (1β2% of bankroll) on every bet regardless of confidence. This prevents a catastrophic loss on any single event and smooths variance across the sample. Unit betting also makes ROI tracking meaningful: profit in units per 100 bets is a stable performance metric that removes bankroll size from the equation.
More sophisticated is Kelly Criterion staking, which sizes bets proportionally to your estimated edge. A 5% edge on a 2.00 bet gets a Kelly fraction of 5%, so on a $2,000 bankroll you bet $100. Kelly maximizes long-run bankroll growth mathematically but requires accurate edge estimates β most professionals use half or quarter Kelly to buffer against overconfidence. Combining Kelly staking with a bankroll tracker creates a complete betting system.
The tracker on this page uses localStorage β your bets persist across sessions but remain private to your device. Track every bet, including losers. Many bettors selectively record winners and forget losses, creating a false impression of profitability. Honest, complete records are the only way to identify whether you have a genuine edge or are experiencing sustained variance. Minimum 200 bets before drawing conclusions.
Key Bankroll Metrics
ROI (%) = (Total Profit / Total Staked) Γ 100 Yield (%) = ROI (same concept, different naming) Unit P&L = Profit expressed in bet units (not dollars) Win Rate (%) = Wins / Total Bets Γ 100 Avg Odds = Ξ£(Odds) / Total Bets Kelly Stake = Bankroll Γ (bΓp β q) / b b = offered odds β 1 p = estimated win probability q = 1 β p
Staking Method Comparison
Fixed amount per bet (e.g., 1% of bankroll). Simple, safe, easy to track. Best for beginners or when edge estimation is uncertain. Loses less during downswings.
50% of Kelly stake. Professional standard. Retains ~75% of Kelly growth while cutting variance by ~50%. Requires honest edge estimates per bet. Use the Kelly calculator.
Double stake after each loss. Exponential blowup risk. A 6-game losing streak doubles the stake 6Γ. Any house edge or finite bankroll guarantees eventual ruin. Never use.
Frequently Asked Questions
How much of my bankroll should I bet per game?
1β3% per bet is the professional standard for flat staking. At 1%, a 20-game losing streak (possible even with a 55% win rate) reduces your bankroll by only 18% β survivable. At 10% per bet, the same streak is catastrophic. Kelly Criterion provides a mathematically optimal percentage if you can accurately estimate your edge.
What is a unit in sports betting?
A unit is a fixed stake amount you set relative to your bankroll (typically 1β2% of starting bankroll). Using units instead of dollar amounts normalizes performance: '+52 units' means the same thing regardless of whether your unit is $10 or $1,000. Units make ROI tracking and comparison meaningful.
How many bets do I need to evaluate my results?
Minimum 200β500 bets before drawing statistically meaningful conclusions. At 100 bets, variance dominates β a 55% bettor can easily show a 45% rate. At 500 bets, the noise-to-signal ratio drops significantly. At 1,000 bets, you have high confidence in whether your edge is real.
Should I adjust my stake after wins or losses?
Yes β proportional staking (Kelly or fixed % of current bankroll) automatically adjusts. After winning, your bankroll grows and so does your stake. After losing, your stake decreases, protecting the remaining bankroll. Never chase losses by increasing stake size β it is the most common cause of betting ruin.