What Is the Vig on -110 and How Do You Remove It? An Implied-Probability Conversion Reference (2026)
Every betting price is a probability with a margin folded in. This reference is the conversion toolkit: how to turn American and decimal odds into implied probabilities, why both sides of a market sum to more than 100%, and how to rescale them back to a fair, no-vig chance. Worked examples throughout, all re-derivable from the numbers shown. Reference material only — no picks, no affiliate links.
This is an educational reference document (PDF / Word), not an app or a betting product to download. WagerLex takes no wagers, publishes no picks, and runs no affiliate links.
What's inside
- American-to-probability formulas for negative and positive prices, with worked figures
- The decimal shortcut: implied probability is simply one divided by the decimal
- Why a -110/-110 market sums to 104.76% and what that excess represents
- Overround versus hold — two related numbers people often blur into one
- Removing the vig by proportional rescaling, shown on a lopsided -200/+170 market
- How to compare two books' prices on a common no-vig scale before you bet
Frequently asked
What is the vig on a -110 bet in plain numbers?
A -110 price implies a 52.38% probability, so both sides of a -110/-110 market sum to 104.76%. That 4.76% overround is the margin; expressed as a share of total stakes it is a theoretical hold of about 4.55%. That is the cost baked into a standard side.
How do I remove the vig from a two-sided price?
Convert both sides to implied probability, add them to get the total, then divide each by that total so they sum back to 100%. On a -200/+170 market the raw figures are 66.67% and 37.04% (sum 103.70%), and the no-vig chances are 64.29% and 35.71%.
Why does the no-vig probability matter?
It is the market's fair estimate with the house margin stripped out, which is the correct number to compare your own opinion against. Beating the no-vig price consistently is what an edge looks like; a bet priced at the no-vig number is fair, so backing it only pays the margin.
Is this a strategy for winning?
No. Converting prices and removing the vig tells you what a bet costs and what the market thinks — it does not create an edge or handicap any game. This is a maths reference (PDF/Word) with no picks, no affiliate links, and no claim to beat the house.