If you've listened to the show, you know we talk a lot about expected value, implied probabilities, and finding mispriced odds. The problem is: doing that math in your head (or worse, on a notes app) is slow and error-prone. So we built the tools we actually wanted to use.
All four calculators are live now at worldatodds.com/tools. They're free, they work on your phone, and there's nothing to sign up for. Here's a quick tour of what each one does and when you'd reach for it.
Odds Converter
The starting point for everything. Enter odds in any format — American (moneyline), decimal, fractional, or implied probability — and instantly see them converted to every other format. It also shows your break-even percentage and potential payout for any stake.
When to use it
Anytime you see odds in a format you're not used to. Polymarket shows implied probability, your sportsbook shows American odds, and European books show decimal. This tool makes them all speak the same language.
Try the odds converter →No-Vig Calculator
Every sportsbook bakes in a margin (the "vig" or "juice"). The no-vig calculator strips it out, showing you the true implied probabilities underneath any line. Enter both sides of a market to see what the book really thinks — and how much they're charging you for the privilege.
When to use it
Before placing any bet. If a book offers you +130 but the fair line is +138, you're getting a bad deal. Compare no-vig lines across books to find the sharpest prices.
Try the no-vig calculator →Hedge Calculator
You placed a bet, the line moved in your favor, and now you want to lock in some profit (or cap your downside). The hedge calculator tells you exactly how much to bet on the other side to hit your target — whether that's guaranteed profit, break-even, or a specific risk level.
When to use it
Anytime you're sitting on an open bet and the line has moved. On the show, we used this exact logic to lock in profit on the Texas primary trade — selling Cornyn shares in tranches as the price rose. Same concept, different execution.
Try the hedge calculator →Expected Value Calculator
The core question behind every bet: is this +EV or -EV? Enter the odds being offered and your estimated true probability. The calculator shows your edge percentage, expected profit per dollar wagered, and whether the bet is worth making.
When to use it
Before every bet you make. This is the most important tool in the set. If you think Cornyn has a 35% chance to win but the market is pricing him at 28.57% (+250), you've got a 6.43% edge. That's a bet worth making. If the numbers don't work, walk away.
Try the EV calculator →Coming soon: Kelly Criterion & Arbitrage
We're also building a Kelly Criterion calculator (optimal bankroll sizing) and an arbitrage calculator for multi-leg futures positions. Both are on the roadmap — follow us on Twitter/X to know when they drop.