No-Vig, Hold and Arbitrage Calculator
Two-way odds in. No-vig fair price, hold and an equal-payout stake split out. American or decimal.
What each number is
- Implied probability: 1 divided by the decimal price, margin included
- Hold: the two implied probabilities added, minus 100%
- No-vig fair probability: each side's implied probability divided by their sum
- No-vig fair price: 1 divided by the fair probability
- Stake split: each side's share of the total is its implied probability over their sum, so either side pays the same
- Negative hold: the two prices add up below 100%, an arbitrage at these prices
Worked examples
- -110 and -110: hold 4.76%, no-vig fair price +100 on both sides
- -115 and -105: hold 4.71%, no-vig fair price -104 and +104
- +105 and +102: hold -1.71%, so $100 splits $49.63 and $50.37 and returns at least $101.74 either way
Odds formats
- American: +150, -110, or 150 for +150
- American prices between -100 and +100 are refused
- Decimal: 2.50, 1.91
- Decimal prices below 1.001 are refused
Before you stake
- A no-vig price is what the two prices imply with the margin removed, not a true probability
- A locked margin holds only if both sides are accepted at these prices
- Sportsbooks limit and close accounts that arb or middle consistently
The Market tier's price board runs this math across the books quoting each market.
Plans and pricing