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Devig Spread Calculator
A simple no-vig calculator for 2–4 way spreads, totals and props. Enter the odds, see the fair odds, and check any price for value.
Open toolAll Devig Sports tools
Every free tool and guide in one place. They all run in your browser and need no account. Not sure where to start? Find the right tool.
No-vig calculators
Remove the sportsbook's margin to see the fair price.
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Devig Props
A no-vig player prop calculator. De-vig sharp two-way odds and price 2–6 leg slips against your real platform payout, with a Slip Lab to compare payout structures.
Open tool/ 03LIVE
Devig Terminal
A no-vig calculator for any 2-way, 3-way or player prop market. Find the +EV pick. All math runs on your device.
Open toolCompare and track
Shop for the best price, then keep score.
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Line Compare
Line up prices from different sportsbooks for the same bet, see the best payout, and compare each price with your own fair probability.
Open tool/ 05LIVE
My Bets
A free bet tracker with a bankroll ledger and closing line value. Your bets are saved on your own device, with CSV export and backup.
Open toolQuick calculators
Small, fast tools for one job each.
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Odds Converter
Switch between American, decimal and fractional odds and implied probability, and see the profit and payout for any stake.
Open tool/ 07LIVE
Parlay Calculator
Combine up to 12 legs into one price, see the payout and break-even chance, and estimate expected value from your own win chances.
Open tool/ 08LIVE
Kelly Calculator
Enter your bankroll, the odds and your estimated win chance to see your edge and a full or fractional Kelly stake.
Open toolGuides
Plain-English explainers.
/ 09GUIDE
What is CLV?
A simple guide to closing line value, with the formula, worked examples and a free CLV calculator.
Read the guide/ 10GUIDE
Which tool do I need?
Pick what you want to do and get sent to the right tool, with a rundown of what each one does.
Read the guide