Sports numbers, explained.

Free lessons, two to four minutes each, on the numbers behind every pick. No account needed.

2 min read

The number the sportsbook draws, and why it usually ends in .5.

2 min read

Turn +110 or −150 into dollars, and into how often the pick has to hit.

2 min read

A pick that happens 61 nights in 100 can still lose money. The gap is what matters.

2 min read

Every pick as a hundred nights, with the dots and the verdict words explained.

4 min read

Turn any American odds into the win rate a pick needs to break even.

4 min read

Write any probability as American odds, then compare it with the posted price.

5 min read

Streaks, parlays and forecast error, explained with simple numbers.

Put the numbers to work.

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