Multi-Lay Calculator

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Using the calculator

My free Multi-Lay Calculator works out the lay stakes you need when you’re laying multiple mutually exclusive outcomes against a single back bet, whether that’s covering several correct scores for a Bet Builder, multiple horses in a price boost, or any other set of outcomes that can’t both happen. It supports qualifying bets, free bets and ‘money back if bet loses’ offers, and it’s built to cope with more than just the standard sums too: profit boosts, different commission rates, underlay and overlay, unlimited lay selections, and automatic maximum exchange liability calculations.

1. Choose your bet type

Start by telling the calculator what kind of offer you’re working with:

• Normal (QB): for standard qualifying bets, where your stake comes back if the back bet wins.
• Free Bet: for Stake Not Returned (SNR) free bets.
• Money Back if Bet Loses: for offers where your qualifying stake is refunded if the back bet loses. Simply enter the cashback amount in the field provided, and the calculator will factor it into every outcome for you.

2. Enter your back bet

Next, fill in the details of your back bet:

• Back stake
• Back odds
• Profit boost percentage (leave this at 0% if your offer doesn’t include one)

3. Add your lay bets

Add each outcome you want to lay, entering the lay odds and commission for each one. Most multi-lays only need two or three selections, occasionally four, but you’re not limited to that if your offer needs more.

You can also rename each outcome, so instead of “Outcome 1” and “Outcome 2” you might use “2-1” and “3-1”, or the name of your selection. Simply update the label, and it’ll carry through to the results table further down, so it’s clear at a glance which outcome is which.

Underlay and overlay

By default, the calculator aims to give you roughly the same profit (or qualifying loss) no matter which outcome comes in. If you’d rather tilt things towards a particular result, simply adjust the Underlay/Overlay slider.

• Underlay reduces each lay stake. This increases your profit if one of your backed outcomes wins, but reduces (or even wipes out) your profit if the back bet loses.
• Standard is the default calculation, aiming to equalise your profit across every possible outcome.
• Overlay increases each lay stake, shifting more of your profit towards the back bet losing, whilst reducing your profit if one of your backed outcomes wins.

Understanding the results

Before you place anything, it’s good practice to check the results table and make sure everything looks as you’d expect. Here’s what each part is telling you:

• Lay stakes: the exact amount to lay for each outcome.
• Individual lay liability: the liability created by each individual lay bet.
• Maximum exchange liability: the most you’ll ever have tied up in your exchange account at once, assuming all your lay bets sit on the same exchange. If you’re splitting lay bets across multiple exchanges, you’ll normally need a bigger balance overall, since liabilities can’t offset each other between accounts.
• Profit breakdown: your expected outcome whether the back bet loses or any individual lay selection wins, so you know exactly what you’ll make (or lose) before a single bet goes on.

Key features

• Supports Normal (qualifying bet), Free Bet and Money Back if Bet Loses calculations
• Unlimited lay selections
• Optional profit boost support
• Different commission rates for every lay
• Underlay and overlay adjustment
• Maximum exchange liability calculation
• Full profit breakdown for every possible outcome
• Completely free to use

Frequently asked questions

What is multi-laying?

Multi-laying is simply the process of laying multiple mutually exclusive outcomes against a single back bet. You’ll most commonly come across it with horse racing price boosts, or when laying off the individual correct score outcomes that match a Bet Builder.

Can I remove a lay bet once I’ve added one?

Yes. Simply select the cross next to the lay you want to remove, and it’ll drop out of your calculation.

Can I use different commission rates?

Yes. Each lay bet has its own commission field, so you can enter a different rate for each one.

Can I use multiple betting exchanges?

Yes, although it’s worth bearing one thing in mind: the Maximum Exchange Liability figure assumes all your lay bets sit at the same exchange. If you’re using more than one, you’ll usually need a larger overall balance, because liabilities can’t be offset between different exchanges.

Does the calculator support other currencies?

Yes. As well as pounds, you can switch to euros or dollars using the currency selector at the top of the calculator.

Is the Multi-Lay Calculator free?

Yes. Like all of my calculators, it’s completely free to use.

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