Smart GamblingStarts With Math
Free professional calculators for sports betting, casino, and poker. Make data-driven decisions, not emotional ones.
Sports Betting
Professional betting calculators
Casino
Bonus & bankroll calculators
Poker
Odds & equity calculators
Is Your Casino Bonus Worth It?
Most players don't realize that a $100 bonus with 35x wagering actually costs them money. Our calculator shows you the real value in seconds.
- Calculate expected losses from wagering
- See the TRUE bonus value (often negative!)
- Compare different bonuses instantly
Why Pro Gamblers Use Our Tools
The difference between winning and losing is often just doing the math
Instant Results
Real-time calculations as you type. No waiting, no page reloads.
Works Everywhere
Phone, tablet, or desktop. Calculate on the go.
Learn the Math
Every calculator explains how the math works.
100% Free
No sign-up, no premium tiers. Free forever.
Frequently Asked Questions
Everything you need to know about GamblerTools
Free Professional Gambling Calculators
GamblerTools provides the most comprehensive collection of free gambling calculators for sports betting, casino, and poker. Whether you're calculating parlay odds, checking the real value of a casino bonus, or analyzing pot odds in poker, our tools give you the mathematical edge you need to make smarter decisions.
Our sports betting section features 37+ professional calculators including odds converter, arbitrage calculator, Kelly criterion, sure bet scanner, and live odds comparison. Casino players can use our wagering calculator to find the true value of bonuses, while poker enthusiasts benefit from equity calculators and ICM tools.
All calculators are 100% free, require no registration, and work on any device. Available in English, Russian, German, Spanish, Portuguese, and Turkish. Join thousands of smart gamblers who use math to make better betting decisions.
Ready to Gamble Smarter?
Stop guessing. Start calculating. Pick a tool and see the difference.