Betting calculators & tools
Every Xtabet calculator, on one page. All free, all client-side, no signup.
Odds Converter
Convert decimal, American, fractional and implied probability odds instantly.
Implied Probability Calculator
Turn any odds into the probability the bookmaker is implying.
No-Vig / Fair Odds Calculator
Strip the bookmaker margin from any two- or three-way market.
Arbitrage Calculator
Find risk-free stakes across two or three books.
Kelly Criterion Calculator
Compute the mathematically optimal stake for long-term bankroll growth.
Parlay / Accumulator Calculator
Multiply any number of legs into combined odds and payout.
Hedge Calculator
Lock in guaranteed profit on a moving line.
Expected Value (EV) Calculator
See if a bet is +EV or -EV before you place it.
Bookmaker Margin Calculator
Measure the overround (juice) baked into any market.
Poisson Score Calculator
Predict football score-line probabilities from two team xG values.
1X2 Probability Calculator
Turn xG into home / draw / away probabilities.
Dutching Calculator
Split stakes across multiple selections for equal profit.
Lay Bet Calculator
Compute lay stake and liability on any exchange.
Matched Betting Calculator
See the qualifying loss and free-bet profit for any matched bet.
Each-Way Bet Calculator
Compute win + place return for each-way horse or golf bets.
Asian Handicap Calculator
Settle any Asian handicap bet including quarter lines.
Free Bet Value Calculator
Extract the true cash value from a stake-not-returned free bet.
Bankroll Growth Calculator
Project bankroll growth at a given ROI and volume.
Session ROI Calculator
Track how a session or day performed vs. staked amount.
Closing Line Value (CLV) Calculator
Compare the odds you took to the closing odds — the single best predictor of long-term profit.
Hold % Calculator
Compute the book’s hold across an entire market.
Line Move Value Calculator
Quantify how far a line has moved in cents / probability terms.
Teaser Bet Calculator
Compute payout for 6, 6.5 and 7-point NFL / NBA teasers.
Round Robin Calculator
Break a large parlay into every possible smaller parlay.
Odds Boost Value Calculator
See the true EV of a bookmaker odds boost.
Break-Even Win-Rate Calculator
Find the win rate you must hit at any odds to break even.
Unit Size Calculator
Pick the right unit size for your bankroll and risk level.
Expected Goals (xG) Calculator
Estimate xG from shots, big chances and shot quality inputs.
Over/Under Goals Probability Calculator
Turn team xG into Over/Under 0.5 – 4.5 goal probabilities.
BTTS Probability Calculator
Compute the probability both teams score in a match.