Bankroll Tracker
Log every bet, see your true win rate and ROI.
How it works
Logging every bet is the one habit that actually helps. It turns vague feelings ('I'm about even') into the real number — usually a slow bleed. Stored only in your browser.
ROI is net P/L divided by total amount staked. It is fairer than absolute profit because it accounts for turnover. The chart shows the cumulative result as entries come in.
Bankroll Tracker
A bankroll tracker is the single most useful habit for any serious bettor. Log every wager and this free tracker turns vague feelings into hard numbers: your true win rate, ROI, net profit, and a cumulative profit chart over time. Everything stays in your browser.
Why track your bankroll
Memory is kind to gamblers — we remember the wins and forget the slow bleed. Logging every bet replaces 'I think I'm about even' with the real figure, which is usually a steady loss for casino games and the difference between winning and losing bettors in sports.
What the metrics mean
ROI (return on investment) is your net profit divided by total amount staked — the cleanest measure of edge. Win rate is the share of bets that profited. Net P/L is your total profit or loss. Watch the cumulative chart: a line drifting down is the truth most systems hide.
Your data is private
Every entry is stored only in your browser's local storage. Nothing is uploaded, no account is required, and you can export the habit of honest record-keeping to any game you play.
How do I calculate betting ROI?expand_more
ROI = net profit ÷ total amount staked, expressed as a percentage. This tracker computes it automatically as you log bets.
What is a good win rate?expand_more
It depends on the odds you take. At even money you need over 50% to profit; at higher odds a lower win rate can still be profitable. ROI is a better single measure than win rate alone.
Is my betting data stored anywhere?expand_more
Only in your own browser via local storage. There is no account and nothing is sent to a server.
Can I track any type of betting?expand_more
Yes. Sports bets, casino sessions, poker — log the stake and net result of anything and the metrics update automatically.