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Betting math tools
The math behind a bet — the vig, fair odds, parlay margin, break-even win rate, and the real cost of a futures bet. Market facts, not picks.
NFL futures cost
NewWhat a Super Bowl future really costs — overround, hold, the dollar cost on $100, and the best-vs-worst book price per team, from a dated 6-book field.
Super Bowl futures vig
How much margin is hidden in the 32-team Super Bowl field — the overround across five sportsbooks, dated and de-vigged.
No-vig calculator
Strip the book’s margin out of a two-way price to see the fair, no-vig odds and implied probability.
Parlay vig calculator
True odds vs the price you’re paid on a parlay — see the compounding margin leg by leg.
Break-even calculator
The win rate a given price needs just to break even, before any margin.
Analysis
Fight Week: what the market did before Saturday →Timestamped no-vig fair-probability movement for the Jul 25–26 combat slate. Market facts, day by day.
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