Twenty-one free calculators covering every bet type Irish punters use — horse racing multiples, football accas, odds conversion, arbitrage and bankroll management. All tools run in your browser with no sign-up required.
Trixie Calculator
3 selections, 4 bets (3 doubles + 1 treble). No singles — needs 2 winners for any return. Cheaper than a Patent.
4 bets · 3 selections Horse RacingPatent Calculator
3 selections, 7 bets (3 singles + 3 doubles + 1 treble). One winner always returns something.
7 bets · 3 selections Horse RacingYankee Calculator
4 selections, 11 bets (6 doubles, 4 trebles, 1 four-fold). No singles — needs 2 winners. Cheaper than a Lucky 15.
11 bets · 4 selections Horse RacingLucky 15 Calculator
4 selections, 15 bets — including 4 singles. The most popular horse racing multiple in Ireland. One winner always pays.
15 bets · 4 selections Horse RacingCanadian Calculator
5 selections, 26 bets (also called a Super Yankee). No singles — needs 2 winners for any return.
26 bets · 5 selections Horse RacingLucky 31 Calculator
5 selections, 31 bets — including 5 singles. One winner always returns something. Big festival favourite.
31 bets · 5 selections Horse RacingHeinz Calculator
6 selections, 57 bets — no singles. Named after Heinz "57 varieties". Needs 2 winners for any return.
57 bets · 6 selections Horse RacingLucky 63 Calculator
6 selections, 63 bets — including 6 singles. The Lucky 63 version of the Heinz. One winner still pays.
63 bets · 6 selections Horse RacingSuper Heinz Calculator
7 selections, 120 bets — no singles. For the big race days when you have confidence across the card.
120 bets · 7 selections Horse RacingGoliath Calculator
8 selections, 247 bets — the largest standard named bet. No singles. Needs 2 winners for any return.
247 bets · 8 selections Horse RacingRound Robin Calculator
3 selections, 10 bets — 3 doubles, 1 treble and 3 up-and-down pairs. Up-and-down pairs give stake back if 1 of 2 selections wins.
10 bets · 3 selections Horse RacingEach-Way Calculator
Works out win and place parts separately. Enter the place fraction (e.g. 1/5) and number of places — covers all Irish racing terms.
Win + Place · Any race Horse RacingRule 4 Calculator
Calculate exactly how much is deducted from your winnings when a non-runner is withdrawn from a race.
Non-runner deductionsAccumulator Calculator
Add up to 10 legs, enter decimal odds and your stake. See your potential return and what each added leg does to the odds.
2–10 selections · Any sport FootballCash-Out Calculator
Is the cash-out offer fair value? Enter your original stake, current odds and the cash-out amount to see the implied percentage.
Fair value check GeneralFree Bet Calculator
Free bets are stake-not-returned — their real value is less than face value. Enter the odds to see exactly what a free bet is worth.
SNR value · Bonus maths GeneralWagering Calculator
How much do you need to bet to clear a bonus? Enter the bonus amount and wagering requirement (e.g. 30×) to see the total.
Bonus playthroughOdds Converter
Switch instantly between fractional (5/2), decimal (3.50) and American (+250) odds. Also shows the implied probability.
Fractional · Decimal · American StrategyBookmaker Margin Calculator
See the overround (vig) built into any market. Paste in the odds for all outcomes and find out the bookmaker's cut.
Overround · True odds StrategyDutching Calculator
Spread your stake across multiple outcomes so you win the same profit whichever one comes in. Popular for horse racing.
Equal profit · 2–8 outcomes StrategyArbitrage Calculator
Find and calculate sure bets. Enter odds from two or more bookmakers to check if a risk-free profit is available.
Sure bets · 2 or 3 outcomes StrategyKelly Criterion Calculator
Find the mathematically optimal stake size based on your edge and the offered odds. Includes half-Kelly and quarter-Kelly options.
Bankroll management · EdgeWhich calculator do I need?
If you're betting on horse racing, start with the Each-Way Calculator for most bets and the Lucky 15 Calculator for the classic festival multiple. The Patent and Heinz are useful for race day accumulators.
For football, the Accumulator Calculator handles everything from a double to a 10-fold. The Cash-Out Calculator tells you whether the offer from the bookmaker is actually fair before you accept it.
If you've claimed a welcome bonus, use the Free Bet Calculator to see the real value and the Wagering Calculator to understand what you need to stake to withdraw any winnings.
For strategy, the Odds Converter is essential if your bookmaker shows fractional odds but you think in decimal (or vice versa). The Kelly Criterion Calculator helps size your bets correctly if you believe you have an edge. The Arbitrage Calculator and Dutching Calculator are for more advanced punters managing multiple bookmaker accounts.
All calculators above work with any bookmaker. Ireland's regulated sportsbooks hold a GRAI remote betting licence — check the GRAI licence register before depositing.