How do I use a sports betting odds calculator?

Enter your bet amount and the odds (American, Decimal, or Fractional format) into the calculator. It will instantly show your potential payout and profit. Our free sports betting odds calculator works for all sports including NFL football, NBA basketball, and MLB baseball.

How do I convert American odds to decimal odds?

For positive American odds: Decimal = (American/100) + 1. For negative American odds: Decimal = (100/|American|) + 1. For example, +150 American = 2.50 Decimal, and -150 American = 1.67 Decimal. Use our free odds converter for instant conversions.

What is the best free parlay calculator?

SportsBettingOddsCalculator.com offers the best free parlay calculator online. Enter up to 15 legs with American, Decimal, or Fractional odds to instantly calculate your total parlay payout and implied probability.

How do I calculate my betting payout?

Use our bet payout calculator: enter your stake and odds. For American odds, if positive: Payout = Stake × (Odds/100) + Stake. If negative: Payout = Stake × (100/|Odds|) + Stake. Our calculator does this instantly for any odds format.

What is an odds payout chart?

An odds payout chart shows potential winnings at different odds levels. Our calculators provide dynamic payout charts for any stake amount, showing payouts for common odds like -110, +100, +150, -200, and more.

Weather Impact Betting Calculator

Quantify weather effects on NFL and MLB game totals. Calculate wind, temperature, and precipitation impact on scoring. The only free weather betting tool.

Weather Conditions

Vegas Total

Stadium Type

Wind (mph)

Wind Direction

Temp (°F)

Humidity %

Precipitation

Rain Chance %

Weather Betting Calculator - NFL & MLB

Our weather impact calculator is the first free tool to quantify exactly how weather affects game totals. Everyone talks about weather in sports betting, but nobody else provides specific point adjustments.

NFL Weather Thresholds

15+ mph wind: -2 points. Passing efficiency drops significantly.
25+ mph wind: -5 points. Field goals unreliable. Run-heavy game script.
Below 32°F: -2 points. Ball harder to grip, reduced passing efficiency.
Snow: -5 points. Visibility and footing compromised. Expect chaos.
Heavy Rain: -4 points. Turnovers increase 40%+. Ground game dominates.

MLB Weather Factors

Wind Blowing Out 15+ mph: +1 to +1.5 runs. Home runs increase.
Wind Blowing In 15+ mph: -0.5 to -1 run. Fly balls die at warning track.
Coors Field: 1.28x park factor. Always adjust for altitude.
Hot Weather (85°F+): +0.5 runs. Ball carries in thin, warm air.
Cold Weather (≤50°F): -0.5 runs. Dead ball, less carry.

How to Use This Data

Compare the weather-adjusted total to the current Vegas line. If the adjusted total is 2+ points different from the posted line, you've found potential value. Weather impacts are often slow to be priced in, especially for afternoon games where conditions change.

This calculator is for informational and educational purposes only. Results should be verified with your sportsbook before placing any wagers. All betting carries risk. Full Disclaimer