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BETTING / CASINO / POKER · OPEN SOURCE

Betting, Casino & Poker Calculators & Audit Tools (2026)

Master the Odds with Math

ToolsGambling is a free, open-source platform for RTP analysis, wager calculation and fairness verification. 89+ betting, casino and poker calculators built on transparent, verified math for 2026.

Explore 89+ ToolsHow it works
89+free tools
2languages
100%Free
NEW · TOOL

Slot RTP Database

Public registry tracking RTP across 15 providers — thousands of slots with weekly source verification. Configurable variants, volatility, max win, source URL. Free embeddable widget for affiliates and writers.

3,500+
Slots
707
Multi-variant
15
Providers
Open Registry →
AI · NEW

AI Casino Bonus Analyzer

Paste the terms of any casino bonus and the AI breaks down wagering, max bet, expiry and game weighting, then tells you whether the offer is actually worth claiming. Trained on real terms from 200+ casinos and kept current for 2026.

Analyze a bonusEmbed it on your site
200+
Casinos trained
<10s
Per verdict
Free
No sign-up

Sports Betting, Casino & Poker: 89 Tools in One Place

From odds conversion to house edge analysis, every calculator is free, open-source, and built on verified math.

How the Calculators Work

Three steps to data-driven gambling decisions

01

Pick a Betting, Casino or Poker Tool

Browse 89+ professional calculators across sports betting odds, casino house edge, poker equity, and more.

02

Enter Odds, Stakes or Game Parameters

Input your real numbers: bet size, RTP percentage, odds format, or any scenario you want to analyze.

03

Get Verified Results Based on Real Math

Every output uses peer-reviewed probability formulas. No casino marketing, no guesswork, just the numbers.

WHY TOOLSGAMBLING?

Betting, Casino & Poker Math, Built by Industry Insiders

Unlike casino-owned sites that hide the math, we give you transparent probability calculations. Every tool is open-source, verified by developers with Builds the tools on this site, and completely free.

Accurate Odds & Probability Engine

Every calculator uses peer-reviewed formulas. No hidden variables, no biased results.

House Edge, RTP & Wagering Analysis

Specialized tools for casino math: house edge breakdowns, RTP tracking, and bonus wagering calculators.

100% Free, No Signup, No Paywalls

Use any calculator instantly. No email, no account, no hidden fees. Free forever.

Built by iGaming Insiders

Made by a fullstack developer and an operations analyst who know how games, odds and margins are actually built, not a marketing team.

Free Embeddable Widgets

Add our RTP database or AI bonus analyzer to your own site with one snippet. Free for affiliates, bloggers and writers.

Open-Source & Transparent Code

All calculation logic is public on GitHub. Verify every formula yourself.

ABOUT TOOLSGAMBLING

What Is ToolsGambling?

ToolsGambling is a free, open-source library of gambling math tools. We turn the probability behind sports betting, casino games and poker into clear, verifiable numbers, so you can see the real expected value, house edge and variance behind every bet before you place it. No casino owns us, and we never push you to gamble.

What You Can Calculate

On the betting side you can convert odds, price parlays, find arbitrage and value bets, and size stakes with the Kelly Criterion. For casino math we cover house edge, RTP, slot volatility, bonus wagering and real bonus EV. Poker players get pot odds, hand equity, ICM and bankroll math. Explore the betting calculators, casino tools and poker calculators, or browse the full slot RTP database.

Who ToolsGambling Is For

Sports bettors use our value bet finder and Kelly calculator to bet with an edge instead of a hunch. Casino players check RTP and house edge before they spin. Poker players study equity and ICM. Affiliates and writers embed our free widgets, and beginners learning the math are welcome too.

Why Trust Our Numbers

Every formula is open-source and published on GitHub, so you can audit the math yourself. ToolsGambling is built and maintained by Evgeniy Volkov, a fullstack developer working in iGaming who builds the calculators and game-style interfaces with Pixi.js and modern web tech. Our slot RTP data is re-verified weekly against provider sources, and you can confirm any result with our provably fair verifier.

System Registry: Probability & Analysis Module Index

89 modules across odds analysis, return-to-player auditing, and tournament mathematics — all verified, all free

toolsgambling — system-registry.db
/sys/bettingValue Bet Calculator
Detect positive expected value from bookmaker mispricing
/sys/bettingHedge Calculator
Lock in guaranteed returns across opposing outcomes
/sys/bettingMargin Calculator
Expose overround percentage in bookmaker lines
/sys/bettingDutching Calculator
Split stakes across selections for equal profit
/sys/bettingMatched Betting Calculator
Extract risk-free profit from promotional free bets
/sys/bettingBankroll Growth Simulator
Project compound growth over thousands of wagers
/sys/bettingRisk of Ruin Calculator
Simulate probability of total bankroll depletion
/sys/bettingStaking Plan Calculator
Compare flat, percentage, and criterion-based sizing
/sys/casinoBonus Value Calculator
Calculate true expected value of deposit offers
/sys/casinoFree Spins Calculator
Convert spin packages into real monetary worth
/sys/casinoMartingale Simulator
Stress-test doubling strategies against variance
/sys/casinoCashback Calculator
Quantify net return from loss-rebate programs
/sys/casinoJackpot EV Calculator
Determine break-even threshold for progressive pools
/sys/casinoVolatility Calculator
Profile hit frequency and payout dispersion by game
/sys/casinoGambler's Fallacy Demo
Interactive proof that past outcomes have zero influence
/sys/pokerOuts Calculator
Count live cards and convert to turn/river percentages
/sys/pokerVariance Simulator
Visualize 100K-hand downswing and upswing distributions
/sys/pokerPoker Bankroll
Set minimum buy-in reserves by game type and stakes
18 records loadedsystem ready_

Betting, Casino & Poker Calculators

89+ free tools built on verified math for every gambling discipline

sys.verify // CERTIFIED — Verified iGaming Expert Team — 18y+ combined exp

iGaming Expert Team: Engineering + Operations

Evgeniy Volkov - Fullstack Developer

Evgeniy Volkov

Fullstack Developer • Pixi.js, WebGL & Gambling Math

I'm a fullstack developer working in iGaming, with my roots in frontend and a growing backend side. I build interactive gambling tools and game-style interfaces with Pixi.js, Canvas and WebGL, the same stack studios use to assemble slots and live games from provider modules. Because I work with that tech, I understand how these games are put together and how the math behind odds, RTP and house edge actually works. I use that to build open-source calculators that put the numbers on the player's side.

My goal is to demystify the industry. I want players to make decisions based on numbers, not emotions or marketing promises.

>ACCESSGITHUB_REPO→>ACCESSLINKEDIN→
>Core Technologies
Px
Pixi.js
2D WebGL Engine
Canvas
Graphics Rendering
WebGL
3D Acceleration
Vue.js
Frontend Framework
JS
JavaScript
Core Language
TS
TypeScript
Type Safety
Anatoly Kolchurin - iGaming Operations Analyst

Anatoly Kolchurin

iGaming Operations Analyst • 8+ Years in Casino & Sportsbook Operations

8 years on the operator side — from risk analysis at Betsson Group to live casino operations at Evolution Gaming. Managed sportsbook margins, audited RTP compliance, and built payout monitoring systems. Now applies insider knowledge to build tools that reveal the real math operators don't want you to see.

I've sat on the operator side. I know exactly how margins are set — and where the value leaks through.

>ACCESSLINKEDIN→
philosophy.ts
1// @author Evgeniy Volkov
2// @role Fullstack Developer
3
4// @author Anatoly Kolchurin
5// @role iGaming Operations Analyst
6
7/**
8 * "I create transparent tools so that mathematics works for players, not just for casinos and bookmakers."
9 *
10 * "I've sat on the operator side. I know exactly how margins are set — and where the value leaks through."
11 */
12
13_

Evgeniy Volkov·Fullstack Developer

Anatoly Kolchurin·iGaming Operations Analyst

Live Audit Log

Real-time engine activity

LIVE
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GAMBLING TOOLS

Frequently Asked Questions

ToolsGambling is a free, independent platform of math tools for sports betting, casino and poker. It is built for bettors who want to price odds and find value, casino players who check RTP and house edge before they play, poker players studying equity and ICM, and affiliates who embed our free widgets. We are not a casino or a sportsbook: we do not take bets or payments, we just show the real probability behind the games.
A gambling odds calculator converts betting odds between formats (decimal, fractional, American) and calculates implied probabilities. It helps you see the true probability behind any odds, so you can compare bookmaker lines and find value bets. Our odds converter and RTP calculator use industry-standard formulas for instant, accurate results.
Yes. Our free betting calculators use the same mathematical formulas that professional bookmakers and casinos rely on. Every algorithm is based on peer-reviewed probability theory and tested against known results. The code behind our tools is transparent. We explain the math behind each calculation so you can verify it yourself.
The house edge is the mathematical advantage a casino has on every bet, expressed as a percentage. It equals the difference between the true odds and the payout odds. For example, in European roulette the house edge is 2.7% because of the single zero. Calculate it for any game with our house edge calculator or check return-to-player rates using our RTP calculator.
The Kelly Criterion is a mathematical formula that determines the optimal bet size based on your perceived edge and the odds offered. It maximizes long-term bankroll growth while minimizing the risk of ruin. Professional bettors use it to avoid overbetting on high-confidence picks. Try our Kelly Criterion calculator to find your optimal stake.
No. ToolsGambling is an analytical and educational platform. We do not accept bets, process payments, or offer any gambling services. We provide free mathematical tools and calculators that help you understand the probability and statistics behind casino games, sports betting, and poker.
Math tools remove guesswork and emotional decisions from gambling. By understanding true probabilities, expected value, and the house edge, players can set realistic expectations and avoid chasing losses. Tools like our gambler's fallacy simulator and risk of ruin calculator show the real numbers behind every bet.
ToolsGambling was created by Evgeniy Volkov, a fullstack developer working in iGaming. He builds the calculators and game-style interfaces himself with Pixi.js and modern web tech, and knows the probability math behind betting, casino and poker. All formulas are open-source on GitHub, so you can verify the math yourself instead of taking our word for it.
RTP (Return to Player) is the percentage of wagered money a game returns to players over time. For example, a slot with 96% RTP returns $96 for every $100 wagered on average. Higher RTP means lower house edge. Use our RTP calculator and volatility calculator to compare games before you play.
Betting odds come in three main formats: decimal (2.50), fractional (3/2), and American (+150). Each represents the same probability differently. Our odds converter instantly translates between all formats, calculates implied probability, and shows your potential payout for any stake.
Bankroll management is the practice of setting and sticking to betting limits based on your total gambling budget. It prevents you from losing more than you can afford and extends your playing time. The Kelly Criterion calculator helps determine optimal bet sizes, while our risk of ruin calculator shows the probability of going bust at different stake levels.
Expected value (EV) is the average amount a bet wins or loses if you repeated it many times. A positive EV (+EV) bet makes money long term; a negative EV bet loses it. You calculate it by multiplying each outcome's probability by its payout and subtracting the stake. Our value bet finder and bonus analyzer show the EV behind bets and casino offers automatically.
They describe the same thing from opposite sides. RTP (Return to Player) is the share of wagers a game pays back over time; house edge is the share the casino keeps. They add up to 100%, so a 96% RTP slot has a 4% house edge. Compare both with our RTP calculator and house edge calculator.
Provably fair games let you confirm a result was not manipulated by checking the server seed, client seed and nonce against a hash. After a round, you reveal the server seed and recompute the hash yourself. Our provably fair verifier does this for you, and our provably fair guide explains the process step by step.
Most disciplined bettors risk only 1-3% of their bankroll per bet, or use the Kelly Criterion to size stakes by their edge. Betting too much raises your risk of ruin even with a real edge. Our Kelly calculator finds the optimal fraction, and the risk of ruin calculator shows the odds of busting at each stake level.