Sports Betting Calculators

Use our betting tools to make smarter wagers and maximize your profits

Bonus Rollover Calculator

Calculate how much you need to wager to clear your bonus and meet sportsbook requirements.

Enter your initial deposit amount in dollars
Enter the bonus percentage offered by the sportsbook
Enter the rollover requirement multiplier from the sportsbook terms

Bonus Results

Bonus Amount:
$50.00
Total to Wager Before Withdrawal:
$250.00
You need to place bets totaling $250.00 to clear your $50.00 bonus. Understanding rollover requirements is essential for maximizing your sports betting bonus value.

Decimal Odds Calculator

Convert American odds to decimal odds and implied probability to find the best value bets.

Enter American odds value without the plus or minus sign
Enter the amount you plan to wager in dollars

Decimal Odds Results

Decimal Odds:
2.50
Implied Probability:
40.00%
Potential Profit:
$150.00
Total Return:
$250.00
Decimal odds (2.50) mean that for every $1 wagered, you'll receive $2.50 back (including your stake) if you win. The implied probability (40%) represents the bookmaker's assessment of the outcome's likelihood.

Kelly Criterion Bankroll Calculator

Calculate the optimal bet size based on your edge and bankroll for long-term sports betting success.

Enter your estimated edge percentage over the bookmaker
Enter American odds value without the plus or minus sign
Enter your total betting bankroll in dollars

Kelly Criterion Results

Kelly Percentage:
7.50%
Optimal Bet Amount:
$75.00
Half Kelly (Recommended):
$37.50
Based on your 5% edge, the optimal bet is 7.50% of your bankroll. Many professional sports bettors use Half Kelly for more conservative bankroll growth and protection against variance.

Martingale Strategy Calculator

Calculate your bet progression using the Martingale strategy, which doubles your bet after each loss.

Enter your initial bet amount
Enter the number of consecutive losses you want to calculate for
Enter your total betting bankroll

Martingale Strategy Results

Final Bet Amount:
$320.00
Total Amount Wagered:
$630.00
Percentage of Bankroll:
63.00%
After 5 consecutive losses, your next bet would be $320.00. You will have wagered a total of $630.00, which is 63.00% of your bankroll. Remember that the Martingale strategy can exhaust your bankroll quickly during a losing streak.

Popular Sports Betting Strategies

D'Alembert Strategy

Progressive Betting System

The D'Alembert system increases your bet by one unit after a loss and decreases it by one unit after a win. It's a less aggressive alternative to the Martingale strategy.

Advantages

  • Lower risk of bankroll depletion than Martingale
  • Slower progression means more sustainable betting
  • Works well with even-money bets (close to 50% probability)

Disadvantages

  • Can still lead to significant losses during long losing streaks
  • Lower potential for quick recovery compared to Martingale
  • Requires disciplined record-keeping to track bet sizes

Fibonacci Strategy

Mathematical Sequence Betting

The Fibonacci betting system follows the famous Fibonacci sequence (1, 1, 2, 3, 5, 8, 13, 21...) where each number is the sum of the two preceding ones. After a loss, you move one step forward in the sequence, and after a win, you move two steps back.

Advantages

  • More controlled progression than Martingale
  • Can recover losses with fewer consecutive wins
  • Mathematical approach appeals to analytical bettors

Disadvantages

  • Sequence grows quickly after several consecutive losses
  • Requires careful tracking of your position in the sequence
  • Like all progression systems, can't overcome the house edge

Value Betting

Finding Odds Discrepancies

Value betting focuses on finding bets where the bookmaker's odds underestimate the actual probability of an outcome. The goal is to identify situations where the expected value of a bet is positive over the long term.

Advantages

  • Mathematically sound approach for long-term profitability
  • Not dependent on winning or losing streaks
  • Used by most successful professional bettors

Disadvantages

  • Requires significant knowledge and research
  • Difficult to consistently identify true value
  • May experience short-term variance despite making good bets

Flat Betting

Consistent Stake Approach

Flat betting involves wagering the same amount on every bet, regardless of previous results. This simple strategy focuses on disciplined bankroll management rather than trying to recover losses quickly.

Advantages

  • Minimizes risk of catastrophic bankroll depletion
  • Easy to implement and maintain
  • Allows for steady, sustainable growth

Disadvantages

  • Slower to recover from losses
  • Doesn't maximize potential gains during hot streaks
  • May seem boring compared to progressive systems
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