A Fix-a-Bet is a corrective back bet used to neutralise or reduce the loss from an already-placed exchange lay that you cannot or do not want to cash out.

How does exchange commission affect the fix?

Commission reduces your profit when the selection loses, so it changes the balance point for the corrective back stake.

Is this the same as cashing out?

No. This calculator assumes you are placing a new back bet in the market rather than using an exchange cash-out button.

What if the back odds move?

If the price changes, recalculate with the new odds to get an updated corrective stake.

Fix-a-Bet Calculator

Q: Can I use this for partial matches?

Yes. Add each matched lay as a separate row and the calculator will combine the exposure before solving for the corrective back stake.

Made an exchange mistake? This tool works out the corrective bet needed to neutralise a wrong lay or over-stake when you cannot cash out. It is designed to reduce losses, not generate profit.

Fix wrong lay, over-lay, or partial matches.
See liability and profit/loss for each outcome.
Get the corrective stake to level outcomes.

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Fix-a-Bet Calculator

Correct a mistaken exchange lay without cashing out.

Exchange recovery

Mode

Bet type

Fix strength (%)

0% = no fix. 100% = level outcomes. Current: 100%

Exchange lay odds (decimal)

Lay stake matched so far (£)

Exchange commission (%)

Advanced: add each matched lay if you were partially matched at multiple odds. When rows are added, the single lay fields are ignored.

Back odds (decimal)

Back commission (%)

This calculator assumes a single selection market and a back bet placed now to offset an existing lay. Enter your exchange lay details, add any partial matches, then set the back price you can get at the moment.

How it works

How the Fix-a-Bet calculation works

Lay outcomes: Win exposure = −(O − 1) × L. Lose profit = L × (1 − c).

Back outcomes: Win profit = (O − 1) × B × (1 − c). Lose loss = −B.

Mode A (level outcomes): solve so win P/L equals lose P/L.

B = (lose_ex − win_ex) ÷ ((O_back − 1) × (1 − c_back) + 1)

Mode B (reduce loss): the stake is an adjustable percentage of the full level-out stake.

Multiple matched lays: sum the lay win/lose exposure for each row, then apply the same formula above.

Always gamble responsibly. This calculator is for information only and does not guarantee profit.

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FAQs

Is this tool meant to generate profit?

No. The goal is to repair an unwanted position and reduce the downside when you cannot cash out.

Why is there a reduce-loss mode?

Sometimes you only want to reduce exposure. The reduce-loss mode uses a smaller stake and shows the new outcomes.

What if my lay was at multiple prices?

Add each matched lay row and the calculator will combine the exposure before solving the fix.

Does back commission matter?

Yes. If your back bet is commissionable, add it so the levelled stake is accurate.