Scalping Calculator
Size stakes for a balanced scalp across two books.
Enter decimal odds for both outcomes and total risk; stakes split for equal profit either way.
Scalping Calculator
Adjust inputs to see updated results.
Table of Contents
How to Use This Calculator
Enter decimal odds for two opposing outcomes and your total risk budget. If implied probabilities sum to less than 100%, the tool splits stakes to lock a small guaranteed profit—classic two-outcome scalp.
Decimal odds
Must be > 1.00 on both sides.
Total risk
Bankroll you want to deploy across both legs simultaneously.
No arb message
If 1/o1 + 1/o2 ≥ 1, the tool reports no arbitrage.
Speed
Scalps vanish fast—this is planning math, not execution latency.
Two-Price Arbitrage
When books disagree enough, Σ implied < 1 and you can balance stakes for profit either way—similar to dutching but framed as risk-free scalp.
Examples
Example 1 — Arb present
Odds 2.05 and 2.05 with sufficient gap—stake split and profit should display when Σ(1/o) < 1.
Example 2 — No arb
1.90 and 1.90 → sum of implicits > 1—tool warns.
Example 3 — Cross-exchange
Include commission when comparing effective decimals.
Frequently Asked Questions
Arbitrage calculator handles three-way markets; this focuses on two decimal prices.
Convert to decimal before entering.
Many limit or close arbers—know operator terms.
Tiny stake rounding can erode edge—verify ticket sizes.
Unmatched half of an arb leaves exposure—finish both legs.
