No-vig calculator: fair odds and sportsbook margin

Enter the odds for every outcome of a market. For hockey 3-way (regulation time) fill in the draw too.

How it works

Add up the implied probability of every outcome. Anything over 100% is the margin the sportsbook builds into the line.

To get the fair probability of each outcome, divide its implied probability by the total. Fair odds are 1 divided by that fair probability.

Compare margins across sportsbooks on the same game. A book that charges 3% instead of 6% pays you more on every bet you make there over time.

What is a normal sportsbook margin?

On main markets such as an NHL moneyline, sharp books charge around 2 to 4%. Recreational books and props are often 5 to 10% or more.

Is no-vig the same as true odds?

It is the fair price according to that sportsbook. It removes the margin evenly, which is a good estimate but not a guarantee of the real chance.

Why does this matter for parlays?

The margin applies to every leg, so a 5% margin on each of four legs adds up to a much larger edge against you on the parlay.

Vig (vigorish): The book's built-in cut on every line, the reason both sides of a game pay a bit less than they really should.
Implied probability: The win chance hidden inside the odds: turn any price into a percentage and you see what the book thinks will happen.
Closing line value (CLV): Comparing the price you got with the final price before puck drop; beating it regularly is the best sign you bet smart.
Moneyline: The simplest hockey bet: you pick who wins the game, overtime and shootout included at most books, and the odds set your payout.

Odds converter Convert American, decimal and fractional odds and see the implied probability.
Parlay calculator Add up to 12 legs and see the combined odds and payout of a parlay.
Wagering calculator Work out how much you need to bet to clear a casino bonus, and what the bonus is really worth after the house edge.