UnjuicedThe calculator collection contains fifteen tools. Start with the question you want answered, enter the correct odds format, and distinguish profit from payout: payout includes the returned stake; profit subtracts it.
Odds Converter
Open Odds Converter. Enter a price in the supported format and compare American, decimal, fractional, cents, and probability equivalents. Add a stake to inspect profit and payout.
Example: +150 is decimal 2.50 and implies a 40% break-even probability. A hypothetical $100 winning stake returns $250, of which $150 is profit. Converting the format does not change the price's value.
Implied Probability
Open Implied Probability. Enter the offered odds to calculate the win rate needed to break even before additional costs. At -110 it is approximately 52.38%.
This is a property of the price, not a forecast of the event. Both sides of a typical bookmaker market can add up to more than 100% because of the margin.
Prediction Market Converter
Open Prediction Market Converter. Enter the contract price in cents to compare it with sportsbook formats. A 40¢ contract paying $1 on success corresponds to decimal 2.50, or +150, before costs.
Use the actual executable quote. A midpoint, historical fill, and current ask can differ; fees and order size can change the effective cost.
No-Vig Fair Odds
Open No-Vig Fair Odds. Enter the two opposing prices for the same market and inspect the no-margin probability and odds estimates. Check any available method selection.
For a symmetric -110/-110 market, proportional removal gives 50% per side. That is a market-derived estimate, not proof the true probabilities are equal. Use compatible lines and settlement rules.
Vig
Open Vig. Enter both prices from a two-sided market to examine its pricing margin. Compare markets with the same outcome structure rather than an isolated favorite price.
For -110/-110, the two raw implied probabilities sum to about 104.76%. The excess over 100% is the overround; it is not the sportsbook's realized profit on every set of bets.
Hold
Open Hold. Use the prices you are comparing across the two outcomes and inspect the displayed hold/overround calculation. This helps compare pricing structures, including the best available quote on each side.
Read the output definition rather than assuming “hold” always means realized revenue divided by handle. Prices from different books still require both legs to be available under compatible rules.
Expected Value
Open Expected Value. Enter stake, offered price, and your fair-probability estimate. The result depends directly on that estimate.
At 50% probability and +110, expected return is 5% of stake. Change the probability to 47% and it becomes roughly −1.3%. Use this sensitivity check to see how much your conclusion depends on the probability input.
Kelly Bet Sizing
Open Kelly Bet Sizing. Enter bankroll, offered odds, and the probability estimate, then inspect the available fractional-Kelly settings and output.
A fraction reduces the model's full-Kelly allocation; it does not correct a wrong probability estimate. A zero or negative result can mean the assumptions do not support a positive allocation. Treat sizing as conditional math, including the exposure of related bets, rather than automatic permission to wager the displayed amount.
Bonus Bet Conversion
Open Bonus Bet Conversion. Enter the stake-not-returned bonus amount, its offered odds, and the opposing cash price. Inspect the required cash stake and net result on both sides.
A bonus bet whose stake is returned is a different product. Check the promotion's actual rules, eligible markets, minimum odds, and settlement conditions before applying this calculation. A nominal bonus amount is not the same as withdrawable cash.
Arbitrage and Hedge
Open Arbitrage and Hedge. Enter both outcome prices and the applicable stake inputs. Compare the calculated split, total exposure, and net result for each side.
Two opposing +110 prices with $50 per side produce $5 net if exactly one side wins under matching rules. If either price or accepted stake changes, rerun the calculation. The output does not confirm execution.
Parlay
Open Parlay. Enter the legs' odds and stake to inspect combined odds, implied probability, profit, and payout.
Two independent +100 legs multiply to decimal 4.00, or +300. That simple multiplication is not a valid pricing model for correlated same-game selections. Compare the operator's actual quote for the specific combination.
Round Robin
Open Round Robin. Enter the selections and combination size, then inspect the number of component parlays, total risk, and result simulation.
Four selections grouped into two-leg parlays create six combinations. At a hypothetical $5 per combination, total stake is $30—not $5. Maximum return assumes the necessary legs win; use the result simulator to inspect other outcomes.
Half-Point Value
Open Half-Point Value. Enter the supported sport, line, and pricing inputs to estimate the effect of buying or selling half a point.
The model can weight key numbers differently. Its output is an estimate under that model, not a universally available conversion rate. Compare the actual alternate-line quote before treating the estimated adjustment as an offer.
Spread to Moneyline
Open Spread to Moneyline. Enter a spread and supported league to estimate corresponding moneyline prices.
The relationship depends on the model and league. It is not a substitute for all the current matchup information or a guarantee that the market should offer the calculated price.
Poisson Probability
Open Poisson Probability. Enter an expected average and the target count, then compare exact, at-least, and at-most outcomes.
The average is an input assumption. A count model is only as useful as its fit to the process being modeled; changing roles or non-independent events can make a simple Poisson assumption inappropriate. Do not enter a betting line as though it were automatically the expected average.
Check unexpected results
Confirm odds format and sign, percentage units, stake versus total stake, and whether the market has two or more outcomes. Use current prices for current decisions. If a result still seems wrong, send support the calculator name and non-sensitive inputs so the calculation can be reproduced.