Betfair Stop-Loss Exit Calculator — Cap Your Loss

Stop-Loss Exit Calculator

Cap your loss on a back-first trade by laying out at worse odds if the price moves against you.

Enter your entry and exit lay odds in decimal format (use the odds converter if needed).

The Strategy:

You Back a selection at low odds (e.g., 2.0).
The trade goes wrong, and the odds *rise* (e.g., to 2.10).
You exit the trade by placing a Lay bet at the new, higher odds to cap your loss.

This calculator finds the exact Lay stake needed to ensure your loss is the same small amount, no matter the outcome.

How to Use:

Initial Back Stake: The amount you first bet.
Initial Entry Odds (Back): The (lower) odds you placed your back bet at.
Stop-Loss Exit Odds (Lay): The (higher) odds you will exit at if the trade fails.

To be a stop-loss, the Lay Odds must be higher than your Back Odds. If they are lower, you are "Greening-Up" (locking in a profit), not setting a stop-loss.

Calculate the exact stake needed to exit a trade for a predetermined loss.

Initial Back Stake (£): Initial Entry Odds (Back): Stop-Loss Exit Odds (Lay):

(Must be higher than Entry Odds, e.g., 2.10)

Stop-Loss Trade Details:

If you lose, your Total Loss is:

Required Stop-Loss Lay Stake:

This lay stake caps your loss at the amount shown above.

Next step: Plan your target odds →

When to use this calculator

Use before entering a back-first trade to define your exit level. Enter entry decimal odds, stop-loss lay odds (where you bail out if the trade goes wrong), and your stake. The calculator shows your capped loss and the lay stake needed at the stop point.

After calculating, use the link to open the target odds calculator with your entry and stop pre-filled. Essential for Lay the Draw when you need to cut the position at a set time.

Frequently asked questions

Does this calculator use Betfair ticks?

Enter decimal odds directly (e.g. 2.10). Use the odds converter if you have fractional or American prices. Tick ladders vary by price band on Betfair.

Is this for back-first or lay-first trades?

This calculator is for back-first trades where you lay out at worse odds to cap your loss if the price moves against you.

How does this relate to Lay the Draw?

If no goal is scored by your target minute, lay the draw at your pre-calculated stop-loss odds to exit with a controlled loss instead of holding to full time.

Disclaimer: For educational and planning purposes only. Not financial or betting advice. 18+ · BeGambleAware.org