63% of Players Skip the Odds Toggle After Their First Loss

A new analysis of anonymized session data from three US-facing sportsbook apps found that 63% of bettors who toggle between "decimal" and "American" odds displays do so exactly once — on the ticket that loses their first wager — and never touch the setting again. The behavior holds across NBA, NFL, and MLB markets, and it persists even after users are shown a tooltip explaining the conversion. The toggle, in other words, is not a feature most players use. It is a feature most players visit once, get burned by, and abandon.

The one-and-done pattern

The dataset covered 412,000 accounts and roughly 9.1 million settled bets between September 2024 and March 2025. Researchers flagged any session where a user changed the odds format, then tracked whether that user returned to the same control within the next 90 days. Only 11% did. The median gap between the first toggle and the second, among that minority, was 41 days.

The trigger is lopsided. Sixty-three percent of first toggles happen within four minutes of a losing ticket settling. The pattern is strongest in same-game parlays, where a single leg can flip a +145 into a -110 and make the displayed payout look wrong to a casual reader.

Why the toggle misleads

American odds are not hard, but they are asymmetric in a way decimal odds are not. A -150 favorite and a +150 underdog look like mirror images. They aren't. The implied probability of -150 is 60%; of +150, it's 40%. The vig sits unevenly, and players who flip formats looking for a cleaner number often find one that flatters the wrong side.

Operators know this. Several major books default to American odds in the US because it is the domestic convention, then bury the decimal option two menus deep. One Midwest-facing app requires four taps to reach the setting; a competitor puts it on the bet slip itself. The four-tap app shows a 22% lower toggle rate. That's not a coincidence — it's friction doing what friction does.

What the numbers don't say

The data can't tell us whether players stopped toggling because they learned the conversion or because they gave up. A follow-up survey of 1,200 users, run by the same research group, leaned toward the second explanation. Of respondents who had toggled once, 58% said they "couldn't tell which number was better" and 34% said they assumed the app was showing them the same thing in two formats.

That last figure matters. If a third of players believe -110 and 1.91 are interchangeable, they aren't misreading the odds. They're misreading the product.

The quiet cost

Odds-format confusion rarely shows up in responsible-gambling metrics, which tend to track deposit velocity, session length, and self-exclusion. But a player who can't parse the number on the ticket is a player making decisions on vibes. The 1-800-GAMBLER line gets calls from people in crisis; it doesn't get calls from people who lost $40 because they thought +150 meant "more likely."

The open question is whether operators have any incentive to fix this. A clearer toggle might reduce handle. A confusing one might not. The 63% figure suggests most players have already stopped looking — which raises the possibility that the toggle isn't a tool at all, but a decoration, and the industry is fine with it staying that way.