Over/Under Calculator
Translate juice on a total into break-even points context.
Enter American odds on over and under; see implied probabilities and market hold.
Over Under Calculator
Adjust inputs to see updated results.
Table of Contents
How to Use This Calculator
Enter American odds for Over and Under on the same game total. The tool reports hold and normalized over probability—identical math path to other two-way parsers on the site.
Same total
Both prices must reference the identical posted number.
American odds
Use the format shown on your book (-110, −105, etc.).
Hold
See how much margin sits in the pair—shop lower hold when possible.
Normalized over %
Quick view of how implied probability splits after the two-way rescaling used internally.
Totals Two-Way
Totals are classic two-sided markets—implied probabilities should sum to more than 100% because of vig. This calculator quantifies that hold for the prices you paste.
Examples
Example 1 — −110 / −110
Hold ≈ 4.76%; normalized over probability ≈ 50% when symmetric.
Example 2 — Favored over
−115 over / −105 under tilts normalized mass toward the over after internal scaling—compare to your model’s fair total.
Example 3 — Alt totals
For alternate lines, use alternate lines framing with the specific pair you bet.
Frequently Asked Questions
Same family—labeled for totals; math path matches two-way American parsing.
Works for any two-way market with over/under labels—ensure prices match.
This UI expects American inputs.
Poisson for goal totals modeling, Half-point.
It rescales the two implied prices to partition 100% for quick directional reads.
Enter whatever live prices you see—math is the same; speed and limits differ.
