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The math the books, brokers, and exchanges hope you never bother to run yourself. Free, instant, no email required.

Sports

Odds & Moneyline Converter

Convert between American odds, decimal odds, and implied win probability — instantly, in either direction.

Converted
Decimal Odds—
Implied Probability—
Fractional (approx.)—

Implied probability includes the sportsbook's built-in vig — it's what the odds imply, not necessarily the true probability.

Sports · Stocks

Kelly Criterion Calculator

Given your real edge and the odds offered, Kelly tells you the mathematically optimal fraction of your bankroll to risk.

Suggested Stake
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Enter your numbers to calculate.

Full Kelly is aggressive and assumes your win-probability estimate is exactly right — which it rarely is. Most professionals bet a fraction of Kelly (often ¼ to ½) to reduce variance. This tool shows full Kelly; size down accordingly.

Crypto

Liquidation Price Calculator

Estimate the price at which a leveraged long or short position gets liquidated, based on your entry and leverage.

Estimated Liquidation Price
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Enter your position details to calculate.

Simplified isolated-margin estimate — actual liquidation price varies by exchange (funding fees, exact maintenance margin tiers, cross vs. isolated margin). Use your exchange's own tool for exact numbers before trading.

Sports · Stocks · Crypto

Compounding ROI Calculator

See what a starting bankroll actually grows to over time at a given return rate — compounded, not simple interest.

Ending Balance
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Enter your numbers to calculate.

Assumes a constant return rate every period, reinvested each time — real returns vary and are never perfectly consistent. For illustration only.

Sports · Auto-updates every 12 hrs

Weather Alert Games

Every NFL & college game this week, sorted worst weather first. Red rows are severe, orange is bad, yellow is moderately bad — everything else is clean. Indoor/dome games are excluded automatically.

Showing every outdoor game this week for each league — scroll within a column to see more.

Schedule via ESPN's public scoreboard feed; forecasts via Open-Meteo, matched to each game's kickoff time and venue. Unofficial data sources — always double-check close to kickoff.

Crypto · Live

Crypto Fear & Greed Index

A daily read on crypto market sentiment, from Extreme Fear to Extreme Greed. Extreme fear often means people are overselling; extreme greed often means people are getting careless.

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Extreme Fear Fear Neutral Greed Extreme Greed

Fetching latest reading…

Live data via Alternative.me's public Fear & Greed Index API, updated daily. A sentiment gauge, not a signal to buy or sell on its own.

Sports · Live

NFL Odds Matrix

This week's real NFL lines, side by side across major books. The point isn't to help you bet more — it's so you can see the hold for yourself instead of taking our word for it. See how the math works →

Loading this week's lines…

Odds via SportsGameOdds, cached and refreshed periodically — not tick-by-tick real-time. Lines move; always confirm the current number on the sportsbook itself before betting. NFL odds are only available during the season (roughly September–February).