We test value-betting, surebet & odds-comparison tools — then publish the data.
ArbSolver is an independent review and education site. We put betting software through recorded tests — scanner speed, supported bookmakers, market coverage, backtesting accuracy — and publish our methodology, hit-rate data, and ROI assumptions in full. The free odds and stake tools below are what we use in our own reviews.
Value-betting and surebet scanner tested for update latency, supported bookmakers, and market coverage. Verdict, pros, cons, and pricing.
Read review →Surebet scanner and odds-comparison tool benchmarked for speed, local bookmaker support, and sports coverage. Verdict, pros, cons, and pricing.
Read review →An odds converter and stake calculator for two or more outcomes. Enter the odds you found and see the stake split and resulting margin.
Educational tool only — it does the math; it does not place bets or pull live odds.
| # | Odds (decimal) | Stake | Return if wins |
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When we review value-betting and odds-comparison software, one of the first things we check is whether the odds it surfaces actually describe a profitable opportunity. The same stake-splitting math appears in arbitrage (when odds across sources disagree) and in value betting (when one source's odds are better than the true probability). The formula below is what our free tool computes, and what we use to sanity-check the opportunities a reviewed product reports.
Two bookmakers disagree on a tennis match. Bookmaker A offers Player X at decimal odds 2.10. Bookmaker B offers Player Y at decimal odds 2.20. Your total stake is $1,000.
Both outcomes return approximately the same amount. The $0.01 difference is because stakes are rounded to the cent — the calculator takes the minimum return as the worst-case return, so the profit figure you see is conservative.
This tool accepts three odds formats. Use the dropdown on each outcome to switch:
2.10. The most straightforward format. Implied probability = 1 / decimal odds.+150 or -200. Positive odds: decimal = (American / 100) + 1. Negative odds: decimal = (100 / |American|) + 1.3/2. Decimal = (numerator / denominator) + 1. Enter as 3/2, 5/1, 10/11, etc.An arbitrage bet (or "arb") is when you place bets on all possible outcomes of an event across different bookmakers, exploiting odds discrepancies so that you lock in a profit regardless of the result. An arbitrage betting calculator does the math for you — it converts the odds, checks if a profit is possible, and tells you exactly how much to stake on each outcome.
The calculator supports any number of outcomes from 2 upward. Two-way markets (e.g. tennis, basketball moneyline) and three-way markets (e.g. soccer win/draw/loss) are both handled. Click "Add outcome" to add more legs.
No. You enter the odds you found manually. This tool does the math — it does not pull live odds from any bookmaker. Real-time odds scanning requires a paid subscription service; this calculator is free and runs entirely in your browser.
No. There is no registration, no login, and no popup. Open the page and use it.
Stakes are calculated to the cent (two decimal places). Due to rounding, there may be a $0.01 difference between what each leg returns — this is normal and unavoidable when working with cents. The calculated profit figure accounts for this.
The math is risk-free — if both bets are placed and accepted at the odds you entered, the profit is locked in. In practice, risks include odds changing before you place the second bet, a bookmaker rejecting or voiding a wager, and account limitations on bettors who arbitrage frequently. This calculator does not eliminate execution risk; it only handles the calculation.