Lay Bet Calculator
Backers stake vs your liability on a lay.
Enter lay odds (decimal) and desired liability or stake to balance.
Lay Bet Calculator
Adjust inputs to see updated results.
Table of Contents
How to Use This Calculator
Enter lay decimal odds and your chosen liability (maximum loss if the selection wins). The tool backs into the backer stake you must accept to cap loss at that liability.
Lay odds
Decimal price you are laying on the exchange.
Liability
How much you pay the backer if the outcome hits—your worst case.
Backer stake
What backers risk against you—smaller than liability when laying favorites.
Commission
Not deducted here—subtract in spreadsheets post-trade.
Exchange Liability
Backer stake = liability / (decimal − 1)
Examples
Example 1 — Defaults
Lay 2.00, liability $100 → backer stake ≈ $100 (even money lay).
Example 2 — Short favorite
Lay 1.50, liability $150 → backer stake $300.
Example 3 — Longshot lay
Higher decimal shrinks required backer stake for fixed liability—risk stays capped.
Frequently Asked Questions
Works for any exchange using decimal lay odds—fees differ.
Convert to decimal before entering.
Only fully matched lays count—partial fills need manual tracking.
Commission hits net winnings—model it after the core lay math.
Laying is betting against an outcome—liability replaces stake-at-risk framing.
