Free odds tool

No-vig odds calculator

Convert American odds, remove hold from a two-way market, and check expected value against your own probability.

Inputs

American odds

Single line optional

Use +145, -120, 100, etc.

Your probability EV

Enter a percent from 1 to 99.

Remove vig

Side A

Side B

Side A odds

Side B odds

Over

50.9%

-104 fair

Under

49.1%

+104 fair

For analytics and education only. Lines move quickly; verify prices before making any paid decision.

Implied probability

52.4%

Decimal odds

1.91

Market vig

4.7%

EV per $100

+$5.00

ROI

+5.0%

At -110, 55.0% true probability is +5.0% EV.

Daily Results

One public watchlist after the sweep, then the graded receipt after results update.