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The sim lab

The tools behind every pick. Build your own slip and see how often it hits across 10,000 sims.

NFL · live

Parlay Sim Lab

Pick any legs from any game and get the hit rate across 10,000 sims, the fair price, and whether the book is paying enough. Correlations between legs are built in.

Open the Sim Lab
NFL · live

Snap by Snap

A play-by-play sim of the featured game with coverage and pressure, the most typical game script, and what-if scenarios.

Open Snap by Snap
Coming soon

Slip checker

Paste a FanDuel or DraftKings slip and get its sim hit rate against break-even before you place it.

Calculators

Do the math yourself

For bettors who want their own numbers. Everything runs in your browser.

No-vig fair odds

Enter both sides of a market to strip out the book's cut and see the true odds it implies.

EV and Kelly

Your win chance plus the book price gives expected value and a Kelly stake.

Parlay odds

Combine up to six legs. Treats legs as unrelated, so same-game legs belong in the Sim Lab.