Crypto Sports Betting: What a Line Actually Costs
We publish no lines. We publish the arithmetic that tells you what any line costs, what the market believes once the margin is taken out, and how large a stake an edge justifies.
Every sportsbook price carries a margin the book never states. The guides below work it out league by league, and the calculators run in your browser on whatever prices you are being offered.
Sports Guides
Why Hold Matters More Than the Pick
Hold is the share of everything staked that a book keeps. A standard −110 on both sides holds 4.55%, and alternate lines and exotic props cost up to two and a half times that.
The effect compounds. A four-leg parlay at standard prices holds about 17%, because the book multiplies prices that already carry margin. Choosing the cheaper market changes your cost by more than choosing a better team.
The Calculators
Five calculators cover the whole chain from a price to a stake. Each runs in your browser and shows its working.
Hold and no-vig calculator
Two prices in, the sportsbook's cut out, plus the fair line underneath with the margin stripped.
Parlay margin calculator
True odds against offered odds across up to six legs, and the hold that compounds between them.
Odds converter
American, decimal, fractional and implied probability, with the break-even win rate.
Kelly stake calculator
The share of a bankroll an edge justifies, at full, half and quarter Kelly.
Arbitrage calculator
Two books, opposite sides, the stake split that locks a return when the prices sum under 100%.
Where to Bet
Every casino in the register recorded as running a sportsbook is listed on the league guides, with its KYC model, networks and minimum deposit. The wider record of each is in the crypto casinos register.
Keep reading
18+18+ only. Gambling carries real risk of loss and the casinos covered here are offshore, which means limited recourse if something goes wrong. Free, confidential support is available at GambleAware and the SAMHSA national helpline.