Back / Lay Guide

Calculates Lay Stake, liability and both outcomes including commission. This guide explains what to enter, the calculation logic, a worked example and how to read the result.

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1Open Back / Lay and start from the pre-filled example or your own data.

2Enter the requested odds, stake and any additional parameters.

3Run the calculation and check the main output first.

4Compare the detailed values or scenarios before changing one input at a time.

⌨️ What to enter

What to enter

Back stake100

Back odds3.00

Lay odds2.80

Commission %5

CurrencyEUR

👀 Example

Try it like this

Back €100 @3.00, Lay @2.80, 5% commission gives a Lay stake of about €109.09 and liability of about €196.36.

💡 What it means

Read the result

The result shows the mathematical output of Back / Lay using the values you entered. Read the headline value first, then use the breakdown to understand how stake, odds and scenarios contribute to it.

🧠 Formula / logic

How it works

Lay stake = (Back stake × Back odds) / (Lay odds − decimal commission)

💡 Use the real exchange odds and commission. Small changes can materially affect the hedge, liability and net result.

⚠️ Common mistakes

Entering odds, percentages or stake in the wrong field.

Treating the output of Back / Lay as a prediction instead of a calculation based on the inputs.

❓ FAQ

Do I need to know the formula for Back / Lay?

No. The formula is shown for transparency; the calculator performs the calculation from the entered values.

Does the result tell me what to bet?

No. It is a mathematical result, not a betting recommendation.

Can I change the example values?

Yes. Start with the example, then change one value at a time to see how the result changes.