Free bookie tool · Spread bets
Sportsbook exposure and layoff calculator
See your biggest possible loss before and after a layoff.
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1. Bets on your book
Total the dollars risked on each side of one spread.
2. Try a layoff
Enter the bet you would place elsewhere.
Your biggest possible loss
This layoff lowers your biggest possible loss by $900.
Show each possible result
Underdog covers
- Without layoff
- $1,200 profit
- With layoff
- $100 profit
Favorite covers
- Without layoff
- $900 loss
- With layoff
- $100 profit
The result updates as you type. It shows net wager results, before fees and collection risk.
How to use this calculator
- Use one game and one spread for your player bets.
- Enter the total dollars risked on the favorite and underdog. Use $0 on a side with no bets.
- Try a layoff amount. Open the line and odds controls if your prices differ.
Do not combine player bets at different spreads or odds into one total. This simple tool cannot show all the risks in a mixed-line book.
Example, math and limits
A matching line and a worse line
In the filled example, players risk $2,200 on the favorite −3.5 and $1,100 on the underdog +3.5. Both sides are −110.
- Without a layoff: the book’s biggest possible loss is $900.
- Lay off $1,100 at −3.5 and −110: the book keeps $100 whichever side covers.
- Change that layoff to −9.5: a favorite win by four through nine leaves a $2,000 loss.
What counts in the result
- Winning players receive their profit. Losing players contribute their risked stake. A push has no net win or loss.
- A winning layoff adds its profit. A losing layoff subtracts its risked stake.
- At −110, $110 risked wins $100 profit. At +150, $100 risked wins $150 profit.
- Use the same game period and overtime rules for every bet.
- Whole and half-point spreads only. Parlays, quarter lines, voids, fees and collection risk are outside this tool.
The calculator compares possible scores. It does not predict the game or choose a layoff amount.
Odds and push conventions: DraftKings’ odds explanation and general rules. Your accepted tickets and house rules govern the actual bets.