Here's the original lay bet calculator video.


When you’re backing, targeting the highest odds is pivotal to maximise value and diminish the bookies’ edge. Conversely, when you’re in the role of the layer (or the Bookie), opt for the lowest possible odds on your lay bets.


They include:

- Calculating the Ideal Stake for Even Profit, Irrespective of the Result

Back Odds x Back State / Lay Odds - commission = Lay Stake

- Profit (if Back Bet wins)

Back Stake x (Back Bet Odds - 1) - Lay Stake x (Lay Bet odds - 1) = Profit

- Profit (if Lay Bet wins)

Lay Stake x (1 - commission) - Back Stake = Profit

- Final profit for a Qualifying Matched Bet

Lay Stake x (1 - commission) - Back Stake = Final Profit

Use Lay Bet Calculators

Even with the formulas in front of you, wagering lay bets and engaging in matched betting exchange is still fraught with difficulties if you do not do your homework.

However, there can be a downside and that is the potential for either the back or lay price to vanish before you have completed both trades. And, in the world of gambling, prices do move quickly.

Stakes, liability, and potential profitsBetfair lay calculator

Of course, you cannot make a profit by backing both players at these prices, as the book percentage is 103.59%.

However, if Bookmaker B offered 1.91 for McEnroe, you would then have a book of 97.81% from .

lay betting is legal in Australiabetting exchangesBetfairoperate under Australian law

If you wanted to lay the Sydney Swans in the AFL Premiership market at the odds of $8.00 and entered a $10.00 stake, that means there is someone else putting $10.00 on (backing) for the same result to happen at the same odds.

Unlike the stock markets, in the world of gambling ‘an asset’ is the price of a horse, football team or athlete and so to employ this strategy in betting your quest is to back a selection at a bigger price than you can lay it elsewhere.


Lay Betting Calculatorback and lay calculator

It is perceived that lay betting increases your chances of winning. In a way it does, because in Horse Racing, laying a horse means you are effectively backing 10 other horses!

Tarvitset Betfair-tilin lay-vetojen asettamiseen

As you can see, we have tapped on the 1.33 to lay Manchester City. We have then nominated a “Backer’s stake” for £50 but that doesn’t mean we are risking £50 of our own money due to the fact that we are laying at betting odds of around 1/3.

Lay Betting Calculatorlay bettingPremier League

The general rule is as follows:

- Lay Stake x (1 - commission) - Back Stake = Profit

For instance, if you wanted to lay a £5 stake on odds of 2.00 and with a 2% commission (10p), you would be looking at a total profit of £4.90.

Calculating Your Matched Bet

Many punters who want to place lay bets at an exchange will also back a bet at a sportsbook.

lay bettingLay Betting Calculatorbetting exchanges in Australia

Etsitään vieläkin isommat kertoimet! Pörssin vastavedon kertoimen pitäisi olla kuitenkin edelleen suht lähellä (vedonlyöntisivuston) back-kerrointa. Hyvät kertoimet ilmaisvetoon ovat esim. 6.5 ja 7 Lay.

Liability = [lay odds x backer’s stake] – backer’s stake

Scout around for the best (lowest) lay odds. Additionally, consider requesting (queuing) lower prices on the betting exchange to reduce your liability—although there’s no guarantee of getting matched if your odds are too low. Nonetheless, making price requests helps reduce the payout amount to Backers in case of a win.

lay bettingLay Betting Calculatorbet matching

Therefore, the equation for calculating liability is as follows:

- Backer’s Odds x Backer’s Stake - Backer’s Original Stake = Liability

Calculating Your Lay Bet Winnings

Now that you know how much you are liable for, you can start to look at what you could win with a lay bet.

Profit = (Back Odds – Lay Odds) * Stake / Lay Odds

A typical, simplistic lay bet calculator will allow you to enter your Back State, and Back Odds, Lay Odds and Lay Commission, and through this, you can find out your liability, stake, and what happens if you win your bet at the bookmaker and exchange.

lay bettingback and lay betting

But, when you lay a selection, you are backing it not to win. This raises ethical questions because it then becomes much easier to fix a race for a specific horse not to win.

Lay Betting Calculatorhow to manage liability in lay betting

You can either back all possible outcomes in an event (Book arbitrage), or back and lay the same selection at different prices (Back/Lay arbitrage).


A book arbitrage opportunity is available whenever the book percentage for an event is under 100%.