To calculate the margin your oddsmaker is taking on a market, take the sum of the implied odds for the outcomes in the market and minus 100.
((1/price 1) + (1/price 2) +… (1/price n)) – 100 = margin
n= number of outcomes in market
The margin is what the sportsbook keeps of all the action they take on a market, to learn more about margins read What Are Sportsbook Margins?
Want to see the margin your oddsmaker is taking without doing the math? Check out our margin calculator.