Arbitrage Betting Calculator 3 Way: Soccer Stakes in A$
- A 3-way soccer lock exists only when the implied probabilities of home, draw and away add up to less than 1.
- Stake each outcome in proportion to its implied probability so every result returns about the same amount at the prices shown.
- Rounding to whole dollars costs a little margin, so re-check every outcome's return against your total outlay after you round.
- If a leg moves before you place it, find the price elsewhere or rebalance at the new price rather than leaving an outcome uncovered.
- Real locks are small, typically around 1.5%, so a calculator showing 20% or more usually means a stale price or a mismatched market.
An arbitrage betting calculator 3 way splits one total stake across home, draw and away so that every result returns about the same amount at the prices shown. Most calculators you'll find online are built for US or global users. They default to American odds, mix in prediction markets and sometimes push in-play bets, which aren't offered to Australians online. This guide stays local. We work through a soccer lock across three Australian books in decimal odds, show the exact stakes in A$, round them to whole dollars, and explain what to do when one price moves before you've placed every leg. You'll also get a checklist for choosing a calculator and an honest look at the risks no tool can remove.
- What does an arbitrage betting calculator 3 way actually work out?
- How do you run a home/draw/away lock across three Australian books?
- Should you round stakes to whole dollars?
- What do you do if one leg moves before you place it?
- What makes the best arbitrage calculator 3 way for Australians?
- Which risks does a sure bets calculator not show you?
What does an arbitrage betting calculator 3 way actually work out?
A 3-way soccer market has three outcomes: home win, draw and away win. A calculator takes the best decimal price for each, checks whether the three prices together leave room for a lock, then tells you how much to put on each.
The check is simple. Divide 1 by each price to get its implied probability, then add the three together. If the total is under 1, the prices lock. If it's 1 or more, there's no lock, however good one price looks.
The stakes come from the same numbers:
- Stake on an outcome = total outlay × (1 ÷ that price) ÷ sum of implied probabilities
- Return on every outcome = total outlay ÷ sum of implied probabilities
Another way to think about it: pick the return you want, then divide it by each price. A target of A$510 at 2.60 needs A$196.15 on that leg. Do that for all three legs and the outlay falls out the bottom.
A good sure bets calculator does this in a second, but it's worth knowing the maths so you can recognise a wrong answer. Some examples on overseas calculator sites show returns of around 32%, which isn't what real locks look like. Over the last 30 days, AUOdds data shows 2,773 locks with a typical size of about 1.5%. Small margins are normal. Big ones usually mean a typo, a stale price or two markets that don't match.
How do you run a home/draw/away lock across three Australian books?
Say a Saturday A-League match has these pre-match prices at three licensed Australian books:
- Home win: 2.60 at Book A
- Draw: 3.60 at Book B
- Away win: 3.10 at Book C
Implied probabilities: 1 ÷ 2.60 = 0.3846, 1 ÷ 3.60 = 0.2778 and 1 ÷ 3.10 = 0.3226. Added together that's 0.9850, under 1, so the prices lock. The return is 1 ÷ 0.9850 = 1.0153, or about 1.5% on outlay.
With A$500 in total, the exact stakes are:
- Home at 2.60: A$195.24, returns A$507.62
- Draw at 3.60: A$141.01, returns A$507.64
- Away at 3.10: A$163.75, returns A$507.63
Whichever result happens, about A$507.63 comes back, a lock of roughly A$7.63 at the prices shown.
Before placing anything, confirm three things the calculator can't see:
- All three bets are on the same full-time result market. Read each book's settlement rules rather than assuming they match.
- The prices are still live. A quote that's a minute old may already be gone.
- Each book will accept your stake. If one caps you at A$100, the whole split needs redoing around that leg.
Also confirm each book is licensed. ACMA publishes a guide to checking whether a gambling operator is legal, and it's worth a look before you open any new account.
Should you round stakes to whole dollars?
Stakes like A$141.01 look odd on a bet slip, and odd stakes can draw attention. Most people round. The question is how far, because rounding pushes the returns apart.
Rounding to whole dollars, with the total still A$500:
- Home A$195 × 2.60 = A$507.00
- Draw A$141 × 3.60 = A$507.60
- Away A$164 × 3.10 = A$508.40
The worst case is now A$7.00 instead of A$7.63, and the best is A$8.40. You've given up 63 cents in the worst case for cleaner stakes.
Rounding to the nearest A$5:
- Home A$195 × 2.60 = A$507.00
- Draw A$140 × 3.60 = A$504.00
- Away A$165 × 3.10 = A$511.50
The worst case drops to A$4.00. That's still a lock, but nearly half the margin has gone. On a thinner lock, heavy rounding can wipe it out.
A simple routine:
- Watch the leg at the longest price. Each dollar there moves its return the most (A$1 on 3.60 shifts the return by A$3.60).
- After rounding, check every outcome's return against your total outlay. Every line must be above it.
- If a line falls below outlay, nudge that leg up a dollar and check again.
The best arbitrage calculator 3 way tools let you pick a rounding level and then show the worst-case return after rounding, not just the theoretical figure. If yours doesn't, do the three multiplications by hand. It takes thirty seconds.
What do you do if one leg moves before you place it?
This is the part most calculators skip. Say you've placed home at 2.60 (A$195) and the draw at 3.60 (A$141). When you get to Book C, the away price has dropped from 3.10 to 2.95. Your A$164 at 2.95 would return only A$483.80, a A$16.20 loss if the away team wins. Don't place the old stake and hope.
You have three options.
1. Find the price elsewhere. Check the other books for the away win. If one has 3.05, stake A$166. That returns A$506.30, total outlay is A$502, and every outcome still returns more than you've put in (A$507.00, A$507.60 and A$506.30). The lock shrinks but holds.
2. Rebalance at the new price. If 2.95 is the best available, work out the stake that matches your other returns: about A$507 ÷ 2.95 = A$172. Outlay becomes A$508, and the returns are A$507.00, A$507.60 and A$507.40, a small loss of A$0.40 to A$1.00. That's a cheap exit compared with leaving one outcome uncovered.
3. Don't chase it. Never put the rest on a different market to 'make it back', and don't wait for the price to drift back as kick-off approaches. Pre-match markets close at kick-off, and online in-play betting isn't offered to Australians, so there's no later chance to fix the position.
To make this rarer:
- Place the leg most likely to move or be limited first, usually the price that's out of line with the rest of the market.
- Have all three accounts logged in and funded before you start.
- Re-check the remaining prices after each leg, not just at the start.
What makes the best arbitrage calculator 3 way for Australians?
Most calculators that rank in search are built for US and global users, and it shows in the defaults. Here's what to look for if you bet with Australian books.
- Decimal odds by default. Australian books quote decimal prices. Converting American odds like +160 by hand adds a step where mistakes creep in.
- A$ stakes and whole-dollar rounding. You want the exact split and the rounded split side by side, with the worst-case return after rounding.
- Fix one stake. If a book limits you to A$100 on the draw, you should be able to lock that leg and have the calculator scale the other two around it.
- Dollar returns on every outcome. Not just a percentage, but the actual figure for home, draw and away.
- Pre-match only. A calculator that suggests in-play opportunities isn't designed for Australian online betting.
- Licensed Australian books only. No prediction markets or offshore sites mixed into the results.
- Fresh prices if it feeds live odds. A surebet calculator is only as good as the prices you give it. Stale odds produce locks that aren't there.
A standalone surebet calculator is fine if you already have the prices. The harder job is finding them: across nine books and three outcomes per match there are a lot of combinations, and good prices rarely last. AUOdds tracks about 15,000 prices across 9 bookmakers at any moment, with prices about 10 seconds old, and each alert includes the exact stake for each outcome. Whatever you use, run the three multiplications yourself before the first bet goes on.
Which risks does a sure bets calculator not show you?
A sure bets calculator assumes every bet stands at the price shown and is paid in full. In practice, several things can break that.
- Prices move between spotting a lock and placing the last leg, as covered above.
- Stakes get limited. Books can cap the amount they'll accept, which can leave you unable to finish a lock.
- Bets can be voided. A pricing error or a market settled differently at one book can unbalance a position you thought was covered.
- Mistakes happen. Backing the wrong team, typing 1410 instead of 141, or choosing a 'draw no bet' market instead of the full-time result. Slow down on the bet slip.
- Account terms differ. Check maximum payouts and withdrawal terms before relying on a book for one leg.
None of this means 3-way locks don't work. It means the margin you see is the best case. Keep a simple record of every lock: date, match, books, prices, stakes and result. That shows your real return after voids and errors, and it helps if you need to think about tax. The ATO's ruling IT 2655 sets out when betting winnings are and aren't treated as income, so read it or speak to a tax adviser about your situation.
Finally, keep it in proportion. Betting is for adults 18 and over. Set a budget you can afford to lose and stick to it. If betting stops feeling like a choice, BetStop, the National Self-Exclusion Register, lets you exclude yourself from licensed Australian online bookmakers, and Gambling Help Online offers free, confidential support at any time.
Frequently asked questions
Is a 3-way calculator different from a 2-way one?
The maths is the same. You divide 1 by each price, add the results and check the total is under 1. The difference is that soccer's draw adds a third outcome, so you need three bets, often at three different books. That means one more price that can move and one more stake that can be limited, so check all three before placing the first leg.
What's a realistic lock size on 3-way soccer?
Small. AUOdds data from the last 30 days shows a typical lock of about 1.5% across 2,773 locks. On A$500 that's roughly A$7.50 at the prices shown, before rounding. If a calculator shows a 3-way lock of 20% or 30%, assume a stale price, a typo or two markets that don't match, and check carefully before staking anything.
Can I use a calculator for in-play soccer arbs?
Not with Australian bookmakers online. Online in-play sports betting isn't offered to Australians, so a calculator that suggests live opportunities isn't built for local betting. Stick to pre-match markets, place all three legs well before kick-off, and remember that once the match starts there's no online way to fix a lock that wasn't completed.
Do I have to round my stakes?
No, but most people do, because stakes like A$141.01 look unusual. Rounding to whole dollars usually costs well under a dollar of margin on a A$500 lock. Rounding to the nearest A$5 can cost far more. Whatever you choose, multiply each rounded stake by its price and confirm every return is still above your total outlay.
Sources
- Check if a gambling operator is legal, Australian Communications and Media Authority
- Taxation Ruling IT 2655: gambling and betting winnings, Australian Taxation Office
- BetStop: the National Self-Exclusion Register, Australian Communications and Media Authority
More guides
18+ only. Betting involves risk, and prices and limits can change before you place a bet. If gambling isn't fun any more, Gambling Help Online (1800 858 858) is free and confidential, and BetStop lets you exclude yourself from every licensed Australian bookmaker.