No-vig price in betting

The no-vig price is what the odds would be if the bookmaker took no margin. It is the market's honest opinion, and the number your own estimate should be measured against.

Convert each outcome to implied probability, add them, then divide each one by that total so they sum to exactly 100%. Invert the result and you have the fair price. This is the single most useful calculation in betting because it converts a commercial product back into a forecast — and the consensus forecast of a sharp market is very hard to beat.

Fair probability = implied / market total. No-vig odds = 1 / fair probability.

Home 2.00 (50%) and Away 2.00 (50%) sum to 100% — no margin, nothing to strip. Now take 1.80 (55.6%) and 2.00 (50%): the total is 105.6%, so fair chances are 52.6% and 47.4%, giving no-vig prices of 1.90 and 2.11. If you can find the away side at 2.20 somewhere else, that is a genuine 4% edge against the fair line.

It gives you a benchmark that is not your own opinion. Beating a no-vig line from a sharp book consistently is the clearest evidence that a strategy is real rather than lucky.

Use the no-vig line from a low-margin international book as your reference, then hunt for Nigerian-facing prices that beat it. That workflow turns local margin differences into a repeatable process instead of a hunch.

• Stripping margin equally in points rather than proportionally, which distorts long-shot prices badly.
• Using a soft book's market as the fair reference; garbage in, garbage out.
• Calculating a no-vig line and then betting it anyway at the vig-inclusive price.