📐 Math-First Analysis 🧮 24 Free Calculators 📊 Strategy Backtests ✓ Independent

Gambling Analysed by the Numbers

Free calculators, probability guides, and strategy backtests — so you understand the math before you place a bet.

🎯
Bonus EV Calculator
Is that bonus actually worth it?
 🔄
Wagering Calculator
How much do you need to wager?
 ⚖️
Arbitrage Calculator
Find risk-free profit opportunities
 📐
Kelly Criterion
Optimal stake sizing for your edge
 📊
RTP / House Edge
What does that RTP actually mean?
 🔁
Odds Converter
Convert between decimal, fractional, US

Free Gambling Calculators

24 tools covering casino and betting mathematics

🎰
Casino Calculators
Calculate expected value, wagering requirements, Kelly stake, RTP, cashback, and more — before you play.
Bonus EV · Wagering · Kelly · RTP · Blackjack · Bankroll · Cashback · and 5 more
Open Casino Tools →
⚽
Betting Calculators
Find arbitrage opportunities, calculate value bets, matched betting profit, and optimal accumulator stakes.
Arbitrage · Value Bet · Matched Betting · Acca · Dutching · Each-Way · and 6 more
Open Betting Tools →

Math Guides

Probability, expected value, and house edge — explained clearly

All 7 guides →
📐 Advanced
How Casinos Make Money: House Edge, RTP & the Mathematics Behind Casino Profits
10 min read
📐 Applied
Variance in Gambling Explained: How Swings, Risk & Bankroll Interact
8 min read
📐 Foundational
Probability in Gambling: How Odds, Streaks and Random Events Actually Work
6 min read

Strategy Backtests

Real simulation data — not opinion

All analyses →
📊 Strategy Analysis
Martingale System Backtest: 200,000 Sessions Simulated
Doubling after every loss cannot change expected value. Across 200,000 simulated European roulette sessions, ROI on turnover stayed at the…

Analytically Evaluated Casinos

Rated on RTP configuration, bonus EV, and licensing — not on who pays us most

All reviews →
1
Casumo
Casumo
Casumo pairs the strongest licence stack on our list with a welcome offer whose arithmetic is merely average - and an independent audit that turned sharply critical in mid-2026. We cut our trust score accordingly. Play it for the regulated recourse and the library, price the bonus before you opt in, and read the T&Cs the auditors flagged.
✓ MALTA GAMING AUTHORITY (CASUMO SERVICES LIMITED) 30 Wagering
Welcome Bonus
100% up to $1,000 + 100 free spins
7.3
/ 10
Visit → Read Review

Our Analytical Approach

Read full methodology →

🧮
Mathematics First
Every recommendation is backed by expected value calculations, probability analysis, and verifiable data.
📊
Backtest-Verified
Strategy claims are tested with simulation data, not anecdote. We publish the results whether they confirm or contradict the theory.
🔬
RTP Verified
Casino reviews check actual configured RTP against provider defaults — a test almost no other affiliate site runs.
⚖️
Independent Ratings
Operators cannot pay to improve their score. Our analytical framework determines ratings, not commercial relationships.
18+ only · Gambling should be entertaining, not a source of income · Responsible Gambling

18+ only · Gambling should be entertaining, not a source of income · BeGambleAware · GamCare · Responsible Gambling