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Sports Betting Tools and Online Gambling Calculators

Our free online gambling tools are designed to improve your chances of success, whether you’re wagering on sports or playing your favorite online casino games.

These online gambling resources help you make smarter, data-driven decisions across sportsbooks and online casinos. You can compare and unlock the best odds, determine how much of your bankroll to wager, calculate payouts and implied probability, evaluate bonus offers, and identify value opportunities across a wide range of betting markets and casino promotions.

Take a look and bookmark your favorites so you can use them to your advantage!

Free Sports Betting Tools and Calculators

Sports Betting ToolHow it Works
3-Way No Vig CalculatorFor events where a tie is possible (like soccer), the three-way fair odds calculator eliminates the vig and presents the odds as a percentage (implied probability) to better clarify the three options.
Arbitrage CalculatorThis calculator will help you determine if betting on two different sides on the same match on two different sportsbooks will move the odds to give you a guaranteed profit.
Fair Odds CalculatorThis one also strips out the vig from the odds, but designed for two possible results: win or lose.
Futures CalculatorDetermine implied probability based on all futures odds for a given sport.
Implied Probability CalculatorImplied probability is simply the American odds presented as a percentage rather than plus (+) and minus (-) lines.
Kelly Criterion CalculatorCalculate how much of your bankroll you should bet based on the probability of winning an outcome.
Martingale CalculatorThis calculator will determine how much you’ll need to wager to recoup losses.
Moneyline CalculatorThe most straightforward calculator of them all. Simply enter your odds and the wager, and see the potential win.
NFL Prop Bet CalculatorAn NFL prop bet calculator attempts to find the fair price for a large number of props based on a limited number of inputs.
NFL Spread CalculatorThis tool will help you compare spreads at different sportsbooks to determine the better bet.
Odds CalculatorAn automated way to convert a form of odds into a different form. For example, American odds to decimal or fractional odds.
Parlay CalculatorBefore you place a parlay bet, use the parlay calculator to ensure you’re taking a higher risk for a worthwhile win potential.
ROI CalculatorCalculate the projected gains from a bet versus the total cost of the bet to determine your potential return on investment (ROI).
Super Bowl SquaresOnline super bowl squares or football squares with friends (no accounts needed).
Best Tools for Football Betting icon

Best Tools for Football Betting

You can gain an edge on your fellow football bettors by using some of our tools. These are the best resources for anyone interested in betting on football games:

  • NFL Spread Calculator: This useful tool helps you determine whether an alternative NFL spread is attractive. For example, if the Detroit Lions are 7-point favorites to win a game, the calculator will tell you that the fair odds on Detroit -7.5 would be -114. If you can find a sportsbook offering -110 on Detroit -7.5, that could be an appealing bet.
  • NFL Prop Bet Calculator: Football fans can enter the spread and total available on an NFL game to determine the expected odds on a long list of props. You can then compare the expected odds to the actual odds available on each prop at your sportsbook, which can help you identify attractive bets.
  • Super Bowl Squares: This printable Super Bowl squares template will help you make any viewing party memorable.
Best Tools for Basketball Betting icon

Best Tools for Basketball Betting

These are some of the best tools at your disposal when betting on basketball:

  • No-Vig Fair Odds Calculator: This tool highlights the odds you would receive if an online sportsbook did not take a house edge (vigorish) on its betting lines. You can use it to figure out which NBA betting apps take a lower house edge than their rivals in your state.
  • Arbitrage Calculator: Arbitrage opportunities can arise when rival sportsbooks offer different odds on the same game. You may spot the chance to wager on both sides of the same NBA bet at rival sites and lock in a guaranteed profit regardless of the outcome. This tool can confirm arbitrage opportunities and highlight how much to wager in order to lock in the largest profit.
  • Kelly Criterion Calculator: Calculate how much of your bankroll you can wager on your basketball picks based on the probability of them winning.
Best Tools for Baseball Betting icon

Best Tools for Baseball Betting

Sharp baseball bettors use a wide range of tools to augment their handicapping skills. These are some of the best resources for MLB fans:

  • Futures Calculator: Enter the odds available on each team to determine the true probability of them winning the World Series, the pennant, or the division. You will also be shown the true odds if no vigorish was taken, which can help you find attractive odds when you shop around.
  • Parlay Calculator: This tool highlights the payout you should receive on a successful parlay. You can use it to check if your sportsbook is offering you a fair deal on your MLB parlays.
  • Arbitrage Calculator: Opportunities to exploit arbitrage can sometimes occur when you compare the MLB lines at rival sportsbooks. Use this tool to check whether you have found an arbitrage opportunity and determine how much you should wager on either side of the bet.
Best Tools for Hockey Betting icon

Best Tools for Hockey Betting

If you would like to bet on hockey games, consider using these tools:

  • Three-Way No Vig Calculator: Hockey bettors can use this calculator to figure out the odds you would receive on a three-way moneyline bet if the sportsbook did not charge any vigorish. This can help you determine which sportsbooks are taking a low house edge and which sportsbooks are charging excessive juice.
  • ROI Calculator: This tool allows you to measure your expected return on investment when placing hockey wagers.
  • Odds Calculator: Many hockey writers and handicappers are based in Canada and often use decimal odds. This calculator quickly converts the odds to the American format.

Free Online Casino Tools & Calculators

We are currently working on exciting additions to our toolbox to help you make better decisions when playing at online casinos. These are the ones that are coming soon:

Casino CalculatorHow it Works
Casino Bonus CalculatorCalculates the true value of a casino bonus by factoring in wagering requirements, bonus amount, maximum bet limits, and eligible games to help you determine whether an offer is worth claiming.
Blackjack CalculatorAnalyzes your hand and the dealer’s upcard to recommend the statistically optimal move (hit, stand, double, split) based on basic strategy principles.
Roulette Payout CalculatorDetermines potential payouts based on your selected bet type (inside or outside bets), stake amount, and the roulette variant you’re playing.

How To Use Our Gambling Tools

Follow these simple steps to use our tools and resources:

1

Choose Tool

Select any of the free tools listed on this page. Use the tool most relevant to the sport you are betting on, or the casino game you are playing.

2

Input Information

Enter the information in the relevant boxes as prompted. Make sure your entries are accurate to get good results.

3

Press Calculate

Hit the “Calculate” button. This will show you the odds of your search or the potential outcome you are trying to measure.

4

Study Results

Your results will then be displayed. Use the information to make a smarter bet.

You can hit “Reset” to start again or quickly edit the information in the boxes to produce new results.

Why Use Online Betting & Casino Tools?

Whether you’re betting on sports or playing online casino games, making informed decisions is critical.

Our gambling tools are designed to remove guesswork and help you rely on math instead of emotion.

Using calculators and data-driven tools can help you:

  • Identify value bets and favorable odds
  • Remove the sportsbook’s margin (vig) to see true probabilities
  • Manage your bankroll more effectively
  • Evaluate casino bonuses before committing to wagering requirements
  • Understand potential payouts and expected returns

While no tool can guarantee profit, smart bettors and casino players use data to improve their long-term results. These resources give you the clarity and confidence to make better decisions every time you place a wager.

Are Gaming Today’s Gambling Tools Free?

Yes! All of the gambling tools and calculators featured on this page are completely free to use.

There are no hidden fees, no subscription requirements, and no mandatory sign-ups. Simply select the tool you need, enter your information, and calculate your results instantly.

Our tools are also mobile-friendly, so you can use them on desktop, tablet, or smartphone whenever you need quick answers before placing a bet or claiming a casino bonus.

Responsible Gambling Reminder

Our betting tools and casino calculators are designed to help you make informed decisions, but they should always be used responsibly.

Remember:

  • Gambling involves risk, and no calculator can guarantee a win.
  • Always set a budget and stick to it.
  • Never chase losses.
  • Only wager money you can afford to lose.

We strongly encourage responsible gaming practices and only feature legally licensed operators.

If you ever feel that gambling is becoming a problem, seek support through responsible gaming resources available in your state or region.

Frequently Asked Questions

A betting calculator is a tool that helps you analyze odds, calculate potential payouts, determine implied probability, and identify value opportunities before placing a wager.

Gambling calculators use mathematical formulas based on the information you provide. As long as your inputs are accurate, the results are mathematically precise. However, they cannot predict the outcome of a sporting event or casino game.

No. Sports betting calculators can help you identify value or arbitrage opportunities, but they do not guarantee winning bets. Outcomes are always uncertain.

To calculate wagering requirements, multiply the bonus amount (and sometimes the deposit amount) by the stated playthrough requirement. A calculator simplifies this process and helps you estimate how much you must wager before withdrawing funds.

Yes. Betting and casino calculators are legal analytical tools that help players understand odds, payouts, and bonus terms. They do not interfere with sportsbook or casino operations.

About the Author
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Martin Green

iGaming Writer

Martin Green is an iGaming writer at Gaming Today who has covered the sports betting industry and casino gaming since 2014. He has a bachelor’s degree in English literature, a master’s degree in creative writing, and various postgraduate journalism qualifications. Green has been featured in a wide range of publications, including USA Today, Detroit Free Press, Miami Herald, Kansas City Star, and CBS.com. He now writes for GamingToday.com and other titles within the Catena Media network.

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