GAMBLING MATH / TOOLS / OPEN SOURCE

Free Gambling Calculators & Audit Tools

Master the Odds with Math

Open-source platform for RTP Analysis, Wager Calculation, and Fairness Verification. 89+ tools verified by senior developers to beat the house edge.

Explore 89+ Tools How it works

89+free tools

6languages

100%Free

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

Pick a Betting, Casino or Poker Tool

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

Enter Odds, Stakes or Game Parameters

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

Get Verified Results Based on Real Math

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

WHY TOOLSGAMBLING?

Gambling Math Tools 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 10+ years in iGaming, 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 Engineers

Created by developers who built RNG systems and odds engines for real casinos and sportsbooks.

Available in 6 Languages

Full localization in English, Russian, German, Spanish, Portuguese, and Turkish.

Open-Source & Transparent Code

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

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

IDModulePATHCapabilityStatus

01Value Bet Calculator/sys/bettingDetect positive expected value from bookmaker mispricingVERIFIED 02Hedge Calculator/sys/bettingLock in guaranteed returns across opposing outcomesONLINE 03Margin Calculator/sys/bettingExpose overround percentage in bookmaker linesACTIVE 04Dutching Calculator/sys/bettingSplit stakes across selections for equal profitREADY 05Matched Betting Calculator/sys/bettingExtract risk-free profit from promotional free betsSYNCED 06Bankroll Growth Simulator/sys/bettingProject compound growth over thousands of wagersLOADED 07Risk of Ruin Calculator/sys/bettingSimulate probability of total bankroll depletionVERIFIED 08Staking Plan Calculator/sys/bettingCompare flat, percentage, and criterion-based sizingONLINE 09Bonus Value Calculator/sys/casinoCalculate true expected value of deposit offersACTIVE 10Free Spins Calculator/sys/casinoConvert spin packages into real monetary worthVERIFIED 11Martingale Simulator/sys/casinoStress-test doubling strategies against varianceREADY 12Cashback Calculator/sys/casinoQuantify net return from loss-rebate programsSYNCED 13Jackpot EV Calculator/sys/casinoDetermine break-even threshold for progressive poolsONLINE 14Volatility Calculator/sys/casinoProfile hit frequency and payout dispersion by gameLOADED 15Gambler's Fallacy Demo/sys/casinoInteractive proof that past outcomes have zero influenceVERIFIED 16Outs Calculator/sys/pokerCount live cards and convert to turn/river percentagesACTIVE 17Variance Simulator/sys/pokerVisualize 100K-hand downswing and upswing distributionsONLINE 18Poker Bankroll/sys/pokerSet minimum buy-in reserves by game type and stakesREADY

/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

Sports betting analytics — odds converter and arbitrage calculator tools

41 tools

Sports Betting Tools: Odds & Arbitrage Calculators

Odds converter, arbitrage finder, Kelly criterion, parlay calculator, EV analysis, and 37+ professional sports betting tools.

Real-time odds conversion Cross-market arbitrage detection Bankroll optimization engine Multi-leg payout analysis

Explore All Tools

Casino analytics — wagering calculator and RTP tracker tools

33 tools

Casino & Slots Analytics: RTP, House Edge & Wagering

Wagering calculator, RTP tracker, house edge calculator, session simulator, slot volatility profiler — 33 tools to audit every casino offer.

Bonus rollover audit Return-to-player tracking Mathematical edge analysis Session variance simulation

Explore All Tools

Poker mathematics — equity calculator and pot odds tools

15 tools

Poker Calculators: Equity, Pot Odds & ICM

Equity calculator, pot odds, ICM trainer for tournament bubbles, GTO range builder, variance simulator — 15 tools from pre-flop to final table.

Hand equity computation Pot odds & implied odds Tournament bubble pressure GTO range construction

Explore All Tools

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

iGaming Expert Team: Engineering + Operations

Evgeny Volkov

iGaming Frontend Developer • 10+ Years Building Casino Interfaces

I spent over a decade building high-load iGaming interfaces and RNG engines using Pixi.js, Canvas, and WebGL. I specialize in Provably Fair logic, reverse-engineering casino algorithms, and variance analysis for slot mechanics. I've seen how the house edge is baked into the code from the inside. Now I use this expertise in algorithmic transparency to build open-source tools that put mathematics 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

Pixi.js

2D WebGL Engine

Canvas

Graphics Rendering

WebGL

3D Acceleration

Vue.js

Frontend Framework

JavaScript

Core Language

TypeScript

Type Safety

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 Evgeny Volkov

2// @role iGaming Frontend Developer

4// @author Anatoly Kolchurin

5// @role iGaming Operations Analyst

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 */

13_

Evgeny Volkov·iGaming Frontend Developer

Anatoly Kolchurin·iGaming Operations Analyst

Live Audit Log

Real-time engine activity

LIVE

toolsgambling — audit-engine

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GAMBLING TOOLS

Frequently Asked Questions

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 Evgeny Volkov, a senior software engineer with over 10 years in iGaming. He has built RNG systems, odds engines, and risk management tools for major gambling platforms. All formulas are open, based on industry-standard mathematics, and verified against professional sources.

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.

GAMBLING INSIGHTS & TIPS