No-Vig Fair Odds & Sportsbook Juice / Hold Percentage Calculator
Calculate bookmaker overround (vig/juice %) and strip the vig to reveal true fair win probabilities for both sides.
Reviewed by: Dr. Ryan Callahan, CSCS, PhD • Exercise Physiology & Sports Analytics
Methodology: Verified Formula
Presets:
True No-Vig Win Probability (A vs B)
50.00% vs 50.00%
Sportsbook Vig / Margin
4.71% Juice
Fair No-Vig Decimal Odds
2.000 vs 2.000
Standard -110/-110 lines carry a 4.76% bookmaker hold.
Scenario Comparison & Benchmark Table (No-Vig Fair Odds)
Compare how scaling Team A Decimal Odds (e.g. 1.91 = -110) affects your output (click any row to load those values into the calculator above):
| Team A Decimal Odds (e.g. 1.91 = -110) | True No-Vig Win Probability (A vs B) | Sportsbook Vig / Margin | Fair No-Vig Decimal Odds |
|---|---|---|---|
| 1.01 | 65.41% vs 34.59% | 51.37% Juice | 1.529 vs 2.891 |
| 1.43 | 57.19% vs 42.81% | 22.29% Juice | 1.749 vs 2.336 |
| 1.91 (Baseline) | 50.00% vs 50.00% | 4.71% Juice | 2.000 vs 2.000 |
| 2.39 | 44.42% vs 55.58% | -5.80% Juice | 2.251 vs 1.799 |
| 2.86 | 40.04% vs 59.96% | -12.68% Juice | 2.497 vs 1.668 |
| 3.82 | 33.33% vs 66.67% | -21.47% Juice | 3.000 vs 1.500 |
Mathematical Formula & Step-by-Step Guide
Primary mathematical equation used by this model:
Book Sum = (1/OddsA) + (1/OddsB); Vig % = Book Sum - 100%; Fair Prob A = ImpA / Book Sum
- Configure your primary input (Team A Decimal Odds (e.g. 1.91 = -110), baseline set to 1.91) using either the direct numeric box or synchronized range slider.
- Adjust the remaining parameters (Team B Decimal Odds (e.g. 1.91 = -110)) to mirror your exact scenario.
- Examine the primary output alongside the secondary breakdown metrics and the 6-tier benchmark comparison table below.
Primary Standards & References: American College of Sports Medicine (ACSM) Metabolic Equations, International Powerlifting Federation (IPF DOTS Formula), Dr. Andrew Coggan Cycling Power Zones & Concept2 Ergometer Physics
Athletic metrics and probability calculations are for informational training and analytical use. Consult a physician before high-intensity training. 21+ Responsible Gaming.
Athletic metrics and probability calculations are for informational training and analytical use. Consult a physician before high-intensity training. 21+ Responsible Gaming.
Frequently Asked Questions — No-Vig Fair Odds
What mathematical formula does the No-Vig Fair Odds & Sportsbook Juice / Hold Percentage Calculator use?
This calculator implements the verified relationship: Book Sum = (1/OddsA) + (1/OddsB); Vig % = Book Sum - 100%; Fair Prob A = ImpA / Book Sum. Each variable (Team A Decimal Odds (e.g. 1.91 = -110), Team B Decimal Odds (e.g. 1.91 = -110)) is evaluated in real time using double-precision floating-point arithmetic so there is zero rounding drift across multi-step scenarios.
How does changing Team A Decimal Odds (e.g. 1.91 = -110) impact the final result?
Team A Decimal Odds (e.g. 1.91 = -110) acts as the primary driver in this model (default baseline: 1.91). Use the Reference Benchmark Table on this page to compare how scaling Team A Decimal Odds (e.g. 1.91 = -110) from conservative to aggressive levels changes both the primary outcome and secondary ratios.
What standards and sources back this No-Vig Fair Odds methodology?
Our model is audited by Dr. Ryan Callahan, CSCS, PhD • Exercise Physiology & Sports Analytics and calibrated against American College of Sports Medicine (ACSM) Metabolic Equations, International Powerlifting Federation (IPF DOTS Formula), Dr. Andrew Coggan Cycling Power Zones & Concept2 Ergometer Physics. Note: Athletic metrics and probability calculations are for informational training and analytical use. Consult a physician before high-intensity training. 21+ Responsible Gaming.