Back Lay Equivalents Calculator

Written by: Alex Windsor
Fact checked by Brian Webb  
Updated: June 18, 2024

Oftentimes, backing one player or outcome of an event will not yield the same profits as placing a lay bet on the other. Generally speaking, this applies to events with only two possible outcomes, and it is feasible to see that Laying will be more profitable compared to Backing.

Knowing Back Lay “equivalents” is paramount, especially when betting on small odds movements and even more so when placing single bets. Using the Back Lay Equivalent calculator is your ticket to going for value bets at betting exchange sites. This is commonly known as greening up, trading out, or Back/Lay Arbitrage.

With a little bit of mathematical magic, our calculator suggests the equivalent of your proposed bet so that you can make an informed decision.


Understanding The Back Lay Calculator

In its barebones form, the back and lay equivalent concept allows you to act as both a bookmaker and a punter. Backing a bet means wagering on a specific outcome to occur, whether on traditional bookmakers or betting exchanges. On the other hand, laying the bet simply implies betting against an outcome (something not happening).

In this regard, our back and lay equivalents calculator assists you in balancing the mentioned type of bets (back and lay) to make them profitable. This calculator helps you compute the stake on your lay bet and create a win-win scenario where either outcome produces the same (even) profits.

For effectiveness, the calculator considers the commission charged by a betting exchange site before formulating the stake required for a lay bet to be profitable based on an existing back bet.

How To Use Our Back Lay Calculator

Using our Back and Lay calculator is as straightforward as it gets! You only need to share the bet amount, back bet odds, and commission. After that, input the lay odds and the lay commission charged at the betting exchange.

The calculator will then compute the stake you need for your lay bet for even profit/loss. It also shows the lay liability and the overall profit/loss to expect from the hedge.

When Is Our Back Lay Equivalent Calculator Useful?

The Back Lay calculator comes in handy at exploiting price differentials for a guaranteed profit in some markets. At any one time, the Back Odds are always lower than the Lay Odds at betting exchanges—however, if you can find a way of betting on a selection at higher odds than its Lay Odds, you’ll be able to lock in a guaranteed profit.

Our Back Lay Equivalents calculator works out the stake required to ensure you win the same amount regardless of the results (with the commission accounted for). In a broader sense, you can use a lay bet to cover all possible outcomes in a market. This will see you either pocket profits or break even.

It is also an ideal risk management strategy as Back Lay equivalents can help you mitigate the impending loss.


The Back Lay Equivalent calculator is a tool that, if used correctly, can give you an edge in your sports bets. With the tool, you can compute the required lay stake to make your back and lay bets at a betting exchange profitable and vice versa.

Unlike traditional betting, Back Lay Equivalent gives you control and flexibility over your bets. It also allows you to take advantage of the moving odds. But before you consider using our Back Lay Equivalent calculator, ensure you keep abreast with events, do research, and master your timing.

If you have found this helpful (which we hope you have) you can check out all our free betting calculators and see how they can help you with your betting.

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Alex, a ten-year iGaming industry veteran and Managing Editor at BettingTools specializes in sports betting and betting tools. He also provides insightful reviews, ensures the accuracy of all offers, and maintains content quality helping you make informed choices. Combining professional expertise with a passion for football and soccer, Alex ensures we offer you a reliable resource, focusing on betting tools to assist with odds, accas, and other betting strategies.