Bet calculator Australia: racing, betting and pokies tools

Key facts

All calculators use Australian decimal odds and tote rules where they apply.
Exotics calculators show combinations, full cost and your flexi percentage.
The pokies calculator shows what a session costs on average; the wagering calculator shows what a bonus is really worth.
Nothing here predicts a winner. The tools show cost, return and the real chance behind a price.

Which calculator do I need?

Your question	Calculator	What it shows
What will this trifecta box cost?	Boxed trifecta calculator	Combinations, cost of a full unit, flexi %
What about a quinella, exacta or first four?	Quinella, exacta, first four	The same, for each exotic
What does my each way bet pay?	Each way calculator	Return if your runner wins, places or misses
What does my bet pay after a dead heat?	Dead heat calculator	Your payout when runners tie for a paid place
What did a late scratching cost me?	Deductions calculator	Adjusted odds and payout after the bookmaker's deduction
What does my multi pay, and how likely is it?	Multi bet calculator	Combined odds, return, chance every leg wins
How many lines are in my Yankee or Lucky 15, and what does it pay?	System bet calculator	Lines, outlay and return for any system bet
What chance does this price imply?	Odds converter	Decimal, fractional and American odds with the implied chance
How much margin is in this market?	Implied probability calculator	Market total, bookmaker margin, fair prices
How do I back several runners for one return?	Dutching calculator	Stake on each runner and the price the dutch adds up to
Do these prices lock in a profit?	Arbitrage calculator	Whether the book is under 100%, stakes and profit
What do I risk laying a selection on an exchange?	Lay bet calculator	Liability, profit after commission, break-even chance
How much do I put on the other side to lock in a profit?	Hedge bet calculator	Hedge stake for equal profit or to cover your stake
Is this bet worth it on average?	Expected value calculator	EV per bet and per $100, break-even chance, edge
How much should I stake on a value bet?	Kelly criterion calculator	Full and fractional Kelly stakes
What does an hour of pokies cost?	Pokies calculator	Average cost per hour and how long a budget lasts
Is this casino bonus worth it?	Wagering requirements calculator	Turnover needed and the average cost of clearing it
What are my keno odds?	Keno odds calculator	Exact chance of each number of matches
What does a Martingale really risk?	Martingale calculator	Bet sequence, bust chance, loss and EV per run

Racing calculators

Exotic bets are where most racing calculators earn their keep, because the cost of a box is not obvious. The boxed trifecta calculator, quinella calculator, exacta calculator and first four calculator count your combinations, show the cost of a full unit and turn any outlay into a flexi percentage. The each way calculator shows what an each way bet returns if your runner wins, places or misses, and when the place half covers your outlay.

When a race does not go to plan, two more tools settle the bet: the dead heat calculator splits your payout when runners tie for a paid place, and the deductions calculator applies the cents in the dollar your bookmaker takes off after a late scratching.

Flexi works the same way on every exotic: your percentage is your outlay divided by the cost of the full bet at $1, so a $15 outlay on a $60 box is 25%, and you collect 25% of the declared dividend. Our flexi betting guide walks through it.

Odds and staking calculators

The multi bet calculator multiplies your legs and shows the implied chance that every leg wins, which is usually much lower than punters expect. The odds converter switches between decimal, fractional and American prices and shows the implied probability behind each one.

Three calculators work on a whole market at once. The implied probability calculator adds up every price to show the bookmaker's margin. The dutching calculator splits a stake across several runners so any of them returns the same amount. The arbitrage calculator checks whether prices from different bookmakers add up to less than 100%; read arbitrage betting in Australia before you try it, because bookmakers can limit accounts.

For a bundle of doubles, trebles and bigger multis from the same selections, the system bet calculator counts the lines in a Trixie, Yankee, Lucky 15 or Heinz and adds up what they return. Two tools handle bets you already hold: the lay bet calculator shows your liability and profit after exchange commission, and the hedge bet calculator works out the stake on the other side that locks in a result. The expected value calculator answers the question behind every bet, whether the price beats the chance.

The Kelly criterion calculator is the odd one out: it needs your own estimate of the chance, and it shows how badly an optimistic estimate can oversize a bet.

Pokies, casino and keno calculators

The pokies calculator turns bet size, speed and RTP into an expected cost per hour, so you can see what a session really costs before you start. The wagering requirements calculator works out the turnover a casino bonus needs and whether it is worth anything once the house edge is paid. The keno odds calculator gives the exact chance of every result when 20 numbers are drawn from 80. The Martingale calculator lists every bet in a doubling sequence and shows how often a run busts and what it costs, so you can see why the system never beats the house edge.

How we build our calculators

Each calculator runs in your browser, stores nothing and needs no sign-up. Every page shows the formula and a worked example, so you can check the numbers yourself. None of them predicts a winner: they show cost, return and the real chance behind a price. If you spot an error, tell us through the contact page and we will fix it and note the change in our editorial policy log.