All calculators
Middle
Set the Over and Under lines, odds, and stakes. If the result lands inside the window both bets cash for a double win; outside it, one side covers the other.
Over
Under
Result
Both win (middle hits)+100ROI +100%
Middle window
2.5 – 3.5Total stake
100One side wins
0Push on a line
−50For information only. Odds and stakes are yours to verify — bet responsibly and within your limits.
Track what you calculate
Flamia turns these numbers into a clean, auditable ledger — auto-imported from your slips, with ROI, CLV, and risk built in.