Calculators
Betting math, simplified.
Run quick calculations for edges, payouts, and conversions without leaving Delta.
Kelly Calculator
Size a bankroll bet based on your edge and line price.
Kelly Stake
5.5% bankroll
Arbitrage Calculator
Check if two lines create a guaranteed profit and size the hedge.
Arb Edge
2.16%
Stake A
$53.54
Stake B
$46.46
Profit
$2.21
Parlay Calculator
Combine legs to see total odds, implied probability, and payout.
Parlay Odds
+320
Decimal
4.200
Implied Prob
23.8%
Total Payout
$210.00
Profit
$160.00
Round Robin Calculator
Estimate combinations, total stake, and max payout if all legs win.
Combinations
3
Total Stake
$60.00
Max Return
$289.45
Max Profit
$229.45
Expected Value
Calculate EV using your win probability and stake.
EV
$5.00
EV % of Stake
5.0%
De-vig Odds
Remove the vig from a two-way market and show fair odds.
No-vig A
50.00%
No-vig B
50.00%
Fair Odds A
+100
Fair Odds B
+100
Promo Converter
Estimate the cash value of a bonus bet using win probability.
Promo EV
$33.33
Conversion Rate
66.7%
Odds Converter
Convert American odds to decimal and implied probability.
American
-110
Decimal
1.909
Implied Probability
52.38%
Implied Probability
Calculate the implied win rate from any line.
Implied Probability
52.38%