No-Vig Odds Calculator

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Parameters

Results

Enter the odds for all outcomes to calculate their true value.

Analysis & How it Works

What is the No-Vig Calculator?

The No-Vig Odds Calculator (also known as the Fair Odds Calculator) is a tool that removes the bookmaker’s vig (also called margin or overround) to reveal the true probabilities and fair odds of an event.

The “vig” represents the built-in profit margin that ensures the bookmaker always has a mathematical advantage, regardless of the outcome.

Why It’s Useful

Using this tool allows you to:

  • Calculate the true fair odds without the bookmaker’s margin.
  • Identify which side of a market has value.
  • Compare different bookmakers to see who offers fairer prices.
How It Works

Enter the odds provided by the bookmaker for all outcomes of an event.

Example:
Team A: 1.90
Team B: 1.90

The calculator converts these odds into implied probabilities:

Team A → 1 / 1.90 = 52.63%
Team B → 1 / 1.90 = 52.63%
Total = 105.26% → the extra 5.26% represents the bookmaker’s vig.

The tool then normalizes these probabilities so that the total equals 100% by removing the vig.

This gives you the true fair probabilities:

Team A → 50.00%
Team B → 50.00%

Which correspond to fair odds of 2.00 – 2.00.