The Math
On Every Line.
Instant, exact betting calculators — odds conversion, parlays, hedges, bonus bets, and fantasy scoring. No ad clutter, no slow media-site bloat, no rounding you can't verify.
Every tool. One page each.
Every tool is its own fast page — enter numbers, see the answer instantly. No forms to submit, no accounts to lose your place.
Odds Converter
Convert American, decimal, fractional, and implied probability instantly.
Betting Odds Calculator
Enter a stake and odds to see payout, profit, and implied win probability.
Parlay Calculator
Combine up to 12 legs and see true parlay odds and payout, pushes included.
Hedge Calculator
Find the exact hedge stake for an equal guaranteed profit on both outcomes.
Bonus Bet Calculator
Convert a bonus or free bet into guaranteed cash — stake isn't returned.
Fantasy Points Calculator
Enter a stat line and see fantasy points across Standard, Half-PPR, and PPR scoring.
Draft Pick Calculator
See exactly which overall picks you get in a snake draft, with optional 3RR.
No-Vig Calculator
Strip the sportsbook's margin out of any line to see true fair odds and win probabilities.
Vig Calculator
See exactly how much margin a sportsbook is charging on any two- or three-way market.
EV Calculator
Find the expected value of a bet from your own win probability — in dollars and as a percent.
Kelly Calculator
Size every bet to your edge with full, half, or quarter Kelly — never a negative-EV stake.
Arbitrage Calculator
Split a stake across books for an equal payout either way — and know instantly if no arb exists.
Round Robin Calculator
Bet every parlay combination of your picks and see the payout for each win/loss scenario.
Teaser Calculator
Price a teaser from your book's odds and see the win rate each leg needs to break even.
Profit Boost Calculator
See what a sportsbook profit boost really pays, the effective odds, and the new break-even win rate.
Implied Probability
Turn any odds into the win probability they imply — or turn a probability into fair odds.
Break-Even Calculator
The win rate you need at any odds, plus profit and ROI for your actual record.
Spread ↔ Moneyline
Estimate the fair moneyline for any NFL or NBA spread, or the spread behind a moneyline.
CLV Calculator
Compare the price you got with the closing line to see if you are beating the market.
Bet Tracker
Log your bets locally and see profit, ROI, CLV, and results by sport, bet type, and odds range.
Calendar
Upcoming games across every major US league, plus all four tennis majors.
Match Lookup
Search upcoming and recent games across NBA, NFL, NHL, and MLB.
Player Lookup
Search players by name across NBA, NFL, NHL, and MLB.
News
Major breaking news across NFL, NBA, NHL, tennis majors, UFC, European soccer, and USA soccer.