Why lay an accumulator one leg at a time?

Laying every leg together carries the full acca liability up front. Laying sequentially — each lay placed only once the previous leg wins — keeps your exchange liability far smaller for the same end result.

What do the four methods do?

Standard matches the whole acca return for a small even loss; Standard Free does the same for a free (stake-not-returned) bet; Underlay minimises liability on early legs and breaks even if any leg loses; Underlay Lock In lays the final leg fully to lock in that leg's profit.

How many legs can it handle?

Between two and five. Adding or removing legs updates the lay schedule instantly.

Sequential lay calculator

Free

Lay off an accumulator one leg at a time, with the stake for each leg.

Sequential lay calculator widget

Loading the interactive widget…

Design — font, colours, radius

Font

Inherit the font of the page it sits on.

Colours

Radius

Default keeps the widget's own corners.

Accent, surface, text and radius are the only overridable tokens: a bounded set that keeps every widget readable. Fonts are stacks, so an embed never downloads one.

Embed code

Embed codeLive

This rewrites itself as you change the controls above: font, colours and radius. It is exactly what renders the preview.

index.html

<div data-or-widget="sequential"
     data-or-theme="midnight"
     data-or-font="host"></div>
<script src="https://oddsrelay.io/widgets/v1/oddsrelay-widgets.js" crossorigin="anonymous" async></script>

Paste it once, anywhere. The script auto-mounts every data-or-widget element and is style-isolated in a Shadow DOM, so it never clashes with your CSS.

Installing on WordPress, Webflow, Squarespace, Wix or React?

WordPress: Add a Custom HTML block (or switch the classic editor to the Text tab) and paste the snippet.
Webflow: Drop in an Embed element, paste the snippet, and publish. The widget renders on the published site.
Squarespace: Insert a Code block where you want the widget and paste the snippet as HTML.
Wix: Add an Embed HTML element (iFrame-free custom code) and paste the snippet.
Shopify: Paste into a Custom Liquid section (or theme.liquid for every page). A section keeps the widget on the one template you want it on.
React / Next.js: Render the div, then load the script once (e.g. next/script or an effect). The bundle auto-mounts new [data-or-widget] elements; call window.OddsRelay.scan() after client-side navigations if needed.

Laying a whole accumulator at once ties up a large liability. Laying it leg by leg — placing each lay only after the previous leg has won — keeps the liability small. Enter the acca's back stake and combined odds, then each leg's lay odds and commission, and this calculator gives you the stake to lay on each leg and the position under four laying methods.

What it does

2 to 5 legs, each with its own lay odds and commission
A progressive lay stake for every leg, one tap to copy
Four methods: standard, standard free bet, underlay and underlay lock-in
The overall qualifying loss if every leg wins
Runs entirely in your browser

How to use it

1Enter the accumulator. Type the back stake and the combined accumulator odds, and pick the number of legs.
2Add each leg. For every leg, enter its exchange lay odds and commission.
3Lay leg by leg. Place each lay only after the previous leg has won, using the stake the calculator shows.

What powers this

This calculator runs entirely in your browser. There's no account, no API key and no feed, and nothing you type leaves the page. The maths is the same commodity matched-betting and value arithmetic used across the industry, implemented carefully and unit-tested.

Questions

Why lay an accumulator one leg at a time?: Laying every leg together carries the full acca liability up front. Laying sequentially — each lay placed only once the previous leg wins — keeps your exchange liability far smaller for the same end result.
What do the four methods do?: Standard matches the whole acca return for a small even loss; Standard Free does the same for a free (stake-not-returned) bet; Underlay minimises liability on early legs and breaks even if any leg loses; Underlay Lock In lays the final leg fully to lock in that leg's profit.
How many legs can it handle?: Between two and five. Adding or removing legs updates the lay schedule instantly.

18+ · Data product for licensed operators. Please gamble responsibly.

↳ · More widgets

Matched betting calculator

Free

Lay stake, liability and locked profit for qualifying bets and free bets.

Bonus calculator

Free

Lay a bonus offer and see the qualifying loss and profit, on a win or a loss.

2Up calculator

Free

Lay a 2Up early-payout offer and see the qualifying loss and the windfall if it triggers.

All widgets

Building a betting product?

Every widget here is free to embed. When you need the feed behind them, matched and rated, start a free trial or get in touch.

Start a free trial Contact / Enquire