Arbitrage involves risk - odds change rapidly, no guaranteed profits.

Arbitrage Calculator

Last updated: January 2026

Arbitrage Calculator Summary

Free calculator to compute optimal stake sizes for prediction markets arbitrage. Enter prices from Polymarket and Kalshi to see exact bet amounts and expected profit.

Sports Betting Calculators

Professional tools for arbitrage, hedging, and value betting calculations

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Arbitrage Calculator

Calculate stake sizes for arbitrage opportunities across platforms

Calculator Settings

Enter Odds & Stake

Bet 1
Bet 2

Results

Total Payout
$0.00
Total Profit
$0.00
ROI %
+0.0%

How To Use Our Betting Arbitrage Calculator

Quick Steps:

  1. Select the Odds Format: Choose between Decimal, Fractional, or American odds.
  2. Enter the Odds: Input the odds from two different sportsbooks offering odds on the same event.
  3. Enter the Total Stake: Input the total amount you are willing to wager.
  4. Click Calculate: The calculator will show the results, including stakes, payouts, and profit percentage.

Using Arbitrage to Make Money in Sports Betting

Traditional sports betting is speculative. You may build expertise in a particular sport and conduct thorough research, but outcomes remain uncertain. Arbitrage trading takes a different approach by exploiting price differences across platforms. When combined costs are less than the payout, you can capture the spread regardless of which outcome wins.

Importance of a Calculator

It can be difficult to know exactly how much to stake on each outcome when you spot price discrepancies. An arbitrage calculator does the math for you, determining optimal stake allocation to capture the spread.

You could try to do this yourself, but it would require a lengthy period of trial and error, using a basic calculator. You would need to enter lots of different potential stakes until finding the ideal amount to stake on your second bet. A hedging calculator does all the hard work for you, and makes the hedge bet process quick and efficient.

Why Do Multiple Sportsbooks Offer Different Odds?

There are several reasons why two rival sportsbooks might offer different odds on the same game. The odds compilers at one book might read the game differently to their counterparts at another book. One sports betting site might offer above-average odds on a particular team in order to stand out from its rivals. This is common among new, ambitious sportsbooks.

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