The Reference
for Odds
Real-time odds aggregation across prediction markets and sportsbooks. Track 12,000+ markets, 27M+ price data points, and the whale trades moving the lines.
Calculators & Analysis
Odds Converter
Convert between American, Decimal, and Fractional odds formats instantly
Parlay Calculator
Calculate parlay odds, payouts, and implied probabilities for multi-leg bets
EV Calculator
Find expected value on any bet to identify profitable opportunities
Vig Calculator
Calculate the bookmaker's margin and find the true odds on any market
DFS & Pick'em
Contest EV Calculator
Calculate expected value of any DFS contest
Pick'em Payout Calc
Exact payouts for PrizePicks, Underdog, Pick6
Entry Optimizer
Find the optimal pick count and entry type
Fantasy Scoring
Calculate fantasy points across DK, FD, Yahoo
Casino
Game Comparison
Compare house edge across casino games
Wagering Requirements
True value of casino bonuses after wagering
Blackjack Strategy
Generate basic strategy charts for any rule set
Expected Loss
Calculate expected cost per casino session
Top-Rated Platforms by Category
The top-rated platforms across every category, ranked by data.
Best Sportsbooks 2026
Ranked by odds quality, features, and availabilityBest Online Casinos 2026
RTP, game variety, and bonus analysisBest DFS Sites 2026
Platform comparison for classic DFS contestsBest Prediction Markets 2026
Fee structures, liquidity, and market depthBest Poker Sites 2026
Traffic, rake, software, and MSIGA coverageBest Sweepstakes Casinos 2026
Free-play casinos with real prize redemptionBest Pick'em Apps 2026
Payouts, features, and state availabilityBest Lottery Apps 2026
Courier services for buying lottery tickets onlineBrowse by Vertical
Guides, reviews, platform comparisons, and interactive tools across every betting and prediction category.
Sports Betting
How odds are made, how to read them, and the data infrastructure behind sports betting.
37 guides
Browse guidesPrediction Markets
What prediction markets are, how to read them, and platform-specific performance data.
38 guides
Browse guidesComparisons
Data-backed comparisons of platforms, sportsbooks, and odds quality.
15 guides
Browse guidesDaily Fantasy
DFS strategy, platform comparisons, and bankroll management for daily fantasy sports.
34 guides
Browse guidesOnline Casino
House edge analysis, game guides, and data-driven casino strategy.
31 guides
Browse guidesPoker
Poker strategy, odds calculation, and platform reviews with real data.
19 guides
Browse guidesLottery
Expected value analysis, odds breakdowns, and historical data for major lotteries.
4 guides
Browse guidesF1 Model
Elo-based championship predictions, circuit-specific win probabilities, and teammate pace analysis.
3 guides
Browse guidesEducation & Guides
Sports Betting
Gambling Taxes in 2026: The Complete US Guide for Sports Bettors, Poker Players, and Prediction Market Traders
Federal and state gambling tax rules for every vertical — sports betting, poker, DFS, prediction markets, casinos, and lottery. W-2G thresholds, OBBBA 90% loss cap, professional vs. recreational status, and record-keeping requirements.
Sports Betting Legal States 2026: Where Can You Bet?
Complete guide to sports betting legalization by state. 38 states plus DC have legal sports betting as of March 2026. Live status, launch dates, and available sportsbooks.
Prediction Markets
Whale Watch Weekly: Week of March 31, 2026
This week's biggest on-chain prediction market trades from OddsReference's whale tracker. Who's betting large, what markets they're moving, and what their track records show.
Research Paper: Forecast Efficiency in CFTC-Regulated Weather Prediction Markets
Academic research paper analyzing 40,032 Kalshi weather contracts. An NWS ensemble model achieves 33% bracket accuracy but no strategy beats fees. 804,248 trade scenarios confirm semi-strong efficiency.
Daily Fantasy
Best DFS Sites 2026: Rake, Traffic & Bonus Compared
Best DFS sites in 2026 ranked by rake structure, contest variety, player pool quality, and bonus value. DraftKings, FanDuel, and Underdog Fantasy compared head-to-head.
DraftKings DFS Review 2026: The Market Leader Tested
DraftKings DFS review with rake rates, contest types, scoring tables, and app ratings. Full-PPR, ~44 states, 8-12% rake. Data-backed 2026 rating inside.
Online Casino
Best Online Casinos 2026: NJ, PA, MI & WV Ranked
Best online casinos in 2026 ranked by RTP, game count, bonus playthrough, and payout speed. iCasino is legal in NJ, PA, MI, WV, and CT — here are the top operators.
Best Sweepstakes Casinos 2026: Free Play, Real Prizes & Legal States
Best sweepstakes casinos in 2026 ranked by game variety, Sweeps Coin value, redemption speed, and state availability. Stake.us, McLuck, and WOW Vegas compared.
Poker
Best Online Poker Sites 2026: Traffic, Rake & Bonuses
Best online poker sites in 2026 ranked by player traffic, rake structure, tournament series, and shared liquidity. WSOP.com, BetMGM Poker, and BetRivers Poker compared.
BetMGM Poker Review 2026: Network, Cross-Product & Shared Pool
BetMGM Poker review covering 3-state shared network, Borgata/partypoker skins, cross-product rewards, and tournament schedule. BetMGM's poker room rated for 2026.
Lottery
Jackpocket Review 2026: Fees, States & DraftKings Integration
Jackpocket review with fee analysis, state availability, DraftKings acquisition impact, and lottery game coverage. The largest US lottery courier app rated across 6 categories.
Jackpot.com Review 2026: AP Partnership, Fees & State Coverage
Jackpot.com review covering Associated Press partnership, fee structure, state availability, and courier model. Lottomatrix-operated lottery courier rated for 2026.