Free Betting Calculators

Betting Odds Calculator

Compare the same football selection at different bookmakers and see exactly what the better price is worth in euros.

Implied Probability Calculator

Convert decimal odds into the implied probability they represent, and see the bookmaker margin across a full football market.

Moneyline Calculator

Convert moneyline (American) odds to decimal and back, and work out the payout and profit on any stake in euros.

No-Vig Calculator

Strip the bookmaker margin out of a market to reveal the fair odds and the true implied probability of each outcome.

Odds Calculator

Convert between decimal, fractional and American odds, read the implied probability, and work out the payout and profit on any stake.

Spread Calculator

Work out the return on a European handicap bet, where a goal head start decides the result and there is no push.

Accumulator (Parlay) Calculator

Work out combined decimal odds, payout and profit for a football accumulator. Handles win, void and non-runner legs.

Accumulator Calculator

Calculate combined decimal odds, payout and profit for a football accumulator (acca) of any size, with void-leg handling.

Double Bet Calculator

Work out the combined odds, return and profit on a two-leg football double from decimal odds.

Single Bet Calculator

Work out the return and profit on a single football bet from your stake and the decimal odds.

Treble Bet Calculator

Work out the combined odds, return and profit on a three-leg football treble from decimal odds.

Alphabet Calculator

Work out the returns on an Alphabet: two Patents, a Yankee and a six-fold across six football selections, twenty-six bets in all.

Canadian (Super Yankee) Calculator

Work out the returns on a Canadian, also called a Super Yankee: twenty-six bets across five football selections.

DSA Calculator

Work out the returns on a Double Stakes About: two conditional bets where each winning leg funds a double stake on the other selection.

Flag Calculator

Work out the returns on a Flag: a Yankee plus six up-and-down pairs, twenty-three bets on four selections.

Goliath Calculator

Work out the returns on a Goliath: two hundred and forty-seven bets across eight football selections.

Goliath Flag Calculator

Work out the returns on a Goliath Flag: a Goliath plus twenty-eight up-and-down pairs, three hundred and three bets.

Heinz Calculator

Work out the returns on a Heinz: fifty-seven bets across six football selections, with no singles.

Heinz Flag Calculator

Work out the returns on a Heinz Flag: a Heinz plus fifteen up-and-down pairs, eighty-seven bets on six selections.

Lucky 15 Calculator

Work out the returns on a Lucky 15: fifteen bets across four football selections, singles included.

Lucky 31 Calculator

Work out the returns on a Lucky 31: thirty-one bets across five football selections, singles included.

Lucky 63 Calculator

Work out the returns on a Lucky 63: sixty-three bets across six football selections, singles included.

Patent Calculator

Work out the returns on a Patent: seven bets across three football selections, singles included.

Round Robin Calculator

Work out the returns on a Round Robin: a Trixie plus three up-and-down pairs, ten bets on three selections.

SSA Calculator

Work out the returns on a Single Stakes About: two conditional bets on two selections, each funding a stake on the other.

Super Flag Calculator

Work out the returns on a Super Flag: a Canadian plus ten up-and-down pairs, forty-six bets on five selections.

Super Heinz Calculator

Work out the returns on a Super Heinz: one hundred and twenty bets across seven football selections.

Super Heinz Flag Calculator

Work out the returns on a Super Heinz Flag: a Super Heinz plus twenty-one up-and-down pairs, one hundred and sixty-two bets.

Union Jack Patent Calculator

Work out the returns on a Union Jack Patent: nine selections in a 3x3 grid with each of the eight lines played as a Patent.

Union Jack Round Robin Calculator

Work out the returns on a Union Jack Round Robin: nine selections in a 3x3 grid with each line played as a Round Robin.

Union Jack Trebles Calculator

Work out the returns on a Union Jack Trebles: nine football selections in a 3x3 grid played as eight trebles.

Union Jack Trixie Calculator

Work out the returns on a Union Jack Trixie: nine selections in a 3x3 grid with each of the eight lines played as a Trixie.

Yankee Calculator

Work out the returns on a Yankee: eleven bets across four football selections, with no singles.

Trixie Calculator

Work out the returns on a Trixie: four bets across three football selections, with no singles.

Arbitrage Calculator

Check whether two opposing prices form an arbitrage and split your stake for a guaranteed profit, using decimal odds.

CLV Calculator

Compare the price you took with the closing price to measure closing line value, the sharpest available check on your betting.

Dutching Calculator

Split a stake across several selections in the same event so you win the same amount whichever one comes in, using decimal odds.

Expected Value Calculator

Work out the expected value of a football bet from the decimal odds and your own estimate of the true probability.

Half Point Calculator

Work out what moving a handicap line by half a goal costs in odds, and whether the shorter price is worth the safer line.

Hold Calculator

Work out a bookmaker's hold - the share of total turnover it expects to keep on a balanced market.

Kelly Criterion Calculator

Work out the Kelly stake - the share of your bankroll to bet - from the decimal odds and your estimated win probability.

Margin Calculator

Work out the bookmaker margin built into a football market by adding up the implied probabilities of every outcome.

ROI Calculator

Measure the return on investment across a set of bets from your total staked and total returned.

Streak Calculator

Work out how likely a winning or losing run is at your strike rate, and what length of losing streak to expect.

Strike Rate Calculator

Work out your strike rate and compare it with the break-even rate the odds you bet at actually demand.

Surebet Calculator

Find a surebet across a three-way football market and split your stake for a guaranteed profit, using decimal odds.

Win/Loss Calculator

Turn a win/loss record into profit, strike rate and ROI, and see the strike rate your average price actually required.

Each-Way Calculator

Work out the win part, place part and total return of an each-way football bet from decimal odds and place terms.

Hedge Bet Calculator

Work out how much to stake on the opposing side to lock in a guaranteed profit on a bet you already hold.

Middle Calculator

Work out the risk and reward of middling: backing both sides on different lines so a result in the gap wins both bets.

Reverse Bet Calculator

Work out the profit and loss on a reverse bet: two if-bets on the same pair of selections, run in both orders.

Asian Handicap Calculator

Work out returns on Asian handicap bets, including quarter lines that split your stake and lines that push.

Bonus Bet Calculator

Work out what a free or bonus bet is really worth, given that the stake is not returned with the winnings.

Forecast Calculator

Work out the returns and the number of bets on straight, reverse and combination forecasts, where the order of the first two matters.

Lay Bet Calculator

Work out the liability and profit on an exchange lay bet, after commission.

Matched Betting Calculator

Work out the lay stake, liability and locked result for a matched bet, from the back odds, lay odds and exchange commission.

Over/Under Calculator

Work out returns on Over and Under goal-line bets and see how many goals each line actually needs.

Poisson Calculator

Turn expected goals into scoreline and match-result probabilities using the Poisson distribution.

Teaser Calculator

Work out the returns on a teaser, where every leg's line is moved in your favour at a reduced combined price.

Tricast Calculator

Work out the returns and the number of bets on straight and combination tricasts, predicting the first three in exact order.

Action

Action is the general term for any bet placed, or the total volume of money wagered on an event or outcome.

Against the Spread (ATS)

A bet judged against a handicap (spread) rather than the final result — did the side cover the points/games margin, not just win?

Arbitrage Betting

Arbitrage betting exploits price gaps between bookmakers to back every outcome of an event for a guaranteed profit, regardless of the result.

Asian Handicap

Asian Handicap is a goal-line betting market that adds or subtracts a virtual head start to level up two unevenly matched teams.

Bad Beat

A bad beat is a well-judged bet that looked all but won, then lost through a freak, very late, or statistically unlikely twist.

Bankroll

A bettor's bankroll is the pot of money set aside solely for betting, managed separately from everyday finances to survive losing streaks.

Betting Handle

Betting handle is the total sum of money staked on an event or market over a given period, a volume figure rather than a profit one.

Betting Limits

The maximum stake or liability a bookmaker allows on a bet, market or account, used to manage the firm's own risk exposure.

Bonus Bet (Free Bet)

A bonus bet is bookmaker credit used to place a wager where only the winnings are paid out — the stake itself is never returned.

Buying Points

Buying points means paying extra vig to shift a spread or total by half a goal, in exchange for worse odds on the same bet.

Cash Out

Cash Out lets a bettor settle a wager before the event finishes, taking a bookmaker-calculated value based on current odds instead of waiting for the result.

Chalk

Chalk is betting slang for the clear favourite in an event — the side or player attracting the most money and the shortest odds.

Closing Line Value (CLV)

Closing Line Value (CLV) measures whether the odds you backed beat the final market price, showing if you got a better price than the market settled on.

Cover

Cover means a team or player beats a handicap line, not just the scoreline — the deciding factor in spread and Asian Handicap bets.

Double Chance

A single bet covering two of the three possible match results (e.g. home win or draw), sacrificing odds for a wider safety margin.

Edge

Edge is the gap between a bettor's true probability estimate and the bookmaker's implied probability, the source of long-run profit.

Even Money

Even money (2.00 decimal, 1/1 fractional) is a price where a winning bet returns exactly double the stake, implying a 50% break-even chance.

Expected Value (EV)

Expected Value (EV) is the average profit or loss a bet would return if placed repeatedly, based on your estimated true probability versus the odds on offer.

Fade the Public (Contrarian Betting)

Fading the public means deliberately betting against the side attracting the most money, on the theory that heavy public backing skews prices in your favour.

Favorite vs Underdog

The favorite is the side priced to win (odds under 2.00); the underdog is priced against, offering longer odds for a less likely result.

Futures Bet

A futures bet is a wager placed on a long-term outcome, such as a league title or tournament winner, settled weeks or months after the stake is placed.

Hedging

Hedging means placing a second, opposing bet on the same event so you lock in a profit or cap a loss no matter which way the result goes.

Hook

The half-point added to a spread or totals line so the bet can never push, forcing every wager to a clean win or loss.

Implied Probability

Implied probability converts betting odds into a percentage chance of an outcome, showing what the price says will happen and where the bookmaker's margin sits.

Juice / Vigorish (Vig)

Juice (or vigorish) is the built-in margin a bookmaker bakes into its odds, the reason a market's true probabilities add up to more than 100%.

Kelly Criterion

A staking formula that sizes each bet as a fraction of your bankroll in proportion to your edge, maximising long-run bankroll growth.

Key Numbers

Key numbers are the goal, game or point margins where results cluster most often, making handicap and total lines set at them move price far more sharply.

Line Movement

Line movement is the change in a bookmaker's odds for a market between opening and kick-off, driven by money, news, and risk management.

Line Shopping

Line shopping is comparing the same bet across multiple bookmakers before staking, to secure the best available price.

Live Betting (In-Play)

Live betting lets you back or lay outcomes on a sporting event after it has kicked off, with odds updating in real time.

Matched Betting

Matched betting locks in a guaranteed profit by backing an outcome at a bookmaker and laying it on an exchange, mainly to cash in free bet offers.

Middling

Middling means betting both sides of a market at two different lines, so a specific result wins both bets for a bonus payout.

Moneyline

A moneyline bet backs one side to win a match outright, with no points handicap or spread attached to the odds.

No Action

A settlement status where a placed bet is cancelled and the stake refunded in full because the market failed to resolve as originally wagered.

Odds Boost

An odds boost is a bookmaker's temporary price increase on a chosen selection, usually stake-capped, designed to lure bets while limiting the firm's downside.

Odds Formats

Odds formats are the different notations—decimal, fractional and moneyline—bookmakers use to display the same price and implied probability.

Oddsmaker / Bookmaker

A bookmaker (or oddsmaker) sets betting prices by converting probability into odds and building in a margin that guarantees a long-run edge.

Off the Board

"Off the board" means a bookmaker has pulled a market from sale, so no new bets on that event or selection are being accepted.

Opening Line / Closing Line

The opening line is a market's first posted odds; the closing line is its final odds before the event starts, and the gap between them measures how sharp your bet was.

Over/Under (Totals)

A bet on whether a match's combined statistic (usually goals) lands above or below a fixed number set by the bookmaker.

Parlay (Accumulator)

A parlay (accumulator) combines multiple selections into one bet that pays out only if every leg wins, multiplying the odds together.

Pick'em

A pick'em is a match priced so tightly that neither side carries a real statistical edge, leaving the bookmaker's margin as the only difference.

Player Prop vs Game Prop

A player prop bets on an individual's stats within a match; a game prop bets on a match-level outcome unrelated to the final score.

Point Spread

A handicap in points applied to a team to level a mismatched game, letting bettors wager on the margin of victory rather than the winner.

Profit Boost

A Profit Boost is a bookmaker offer that temporarily raises the decimal odds on a chosen selection, increasing potential winnings from the same stake.

Prop Bet (Proposition Bet)

A prop bet is a wager on a specific occurrence inside a match, separate from who wins or the final scoreline.

Public Betting Percentage

The share of bets (by ticket count or stake) placed on one side of a market, used to spot where the crowd — and the smart money — are leaning.

Push

A push is a graded bet where the result lands exactly on the line, so the stake is simply returned with no win or loss.

Qualifying Bet

A qualifying bet is the real-money wager a bettor must place, at stated odds and stake, to unlock a bookmaker's free bet or bonus offer.

Reload Bonus

A reload bonus is a deposit match offered to existing account holders on top-up deposits, not just on their first sign-up deposit.

Reverse Line Movement

Reverse line movement is when odds shift against the side taking the most bets, revealing that sharper, heavier stakes are backing the other outcome.

Risk-Free Bet

A promotion that refunds a losing first bet as free bet credit, so the bettor's real exposure on that wager is close to zero.

ROI (Return on Investment)

ROI measures the profit a betting strategy returns as a percentage of everything staked, revealing whether it actually makes money.

Round Robin

A round robin combines three or more selections into every possible double, treble and multiple, so the bet can still pay out even if one leg loses.

Run Line / Puck Line

A fixed handicap bet from baseball and ice hockey where the favourite must win by more than 1.5 runs or goals, priced through shifting odds rather than a moving line.

Same-Game Parlay

A same-game parlay bundles several bets from one match into a single wager, priced below simple multiplication because the legs aren't independent.

Sharp vs Square

Sharp and square describe a bettor's skill level and how bookmakers treat them, from sophisticated line-movers to casual, recreational punters.

Site Credit

Site credit is bonus value added to a betting account that can only be staked on the platform, not withdrawn until specific conditions are met.

Stale Line

A stale line is a posted price that hasn't yet been adjusted for new information, letting sharp bettors get better odds than the market now justifies.

Steam Move

A steam move is a sudden, market-wide shortening of a price triggered by heavy or sharp money, signalling where informed cash is landing.

Straight Bet

A straight bet is a single wager on one outcome at its own odds, settled entirely on whether that one result happens.

Teaser

A teaser combines two or more spread or total selections into one bet, letting you move each line in your favour for a lower, fixed payout.

Tout

A tout sells betting tips or picks for a fee, profiting from subscriptions rather than from the bets themselves being right.

Units

A unit is a fixed slice of your bankroll (not a currency amount) used to size every bet consistently and track results without exposing your stake size.

Variance (in Betting)

Variance measures how far actual betting results swing away from expected value, even when the underlying edge is real.

Wagering Requirements (Rollover)

Wagering requirements set the number of times a bonus (and often the deposit) must be staked before winnings can be withdrawn.