What is a point spread?

A point spread is a handicap set by a sportsbook to level the playing field between two unequal teams. The favorite must win by more than the spread; the underdog must not lose by more than the spread (or win outright). Both sides of the bet typically pay -110 odds, meaning you risk $110 to win $100.

What does 'covering the spread' mean?

Covering the spread (or beating the spread, ATS) means your team's result satisfies the spread condition. If you bet on a -6.5 favorite, they must win by 7 or more. If you bet on a +6.5 underdog, they must win outright or lose by 6 or fewer points.

What is a push in sports betting?

A push occurs when the final margin equals the spread exactly (e.g., spread -7, team wins by exactly 7). Pushes result in a full refund of your wager — no profit, no loss. Sportsbooks often use half-point spreads like -6.5 to eliminate pushes.

How is the payout calculated on a spread bet?

Spread bets use American odds, most commonly -110. To win $100 you risk $110, so payout = bet + (bet × 100 ÷ |odds|) for negative odds, or bet + (bet × odds ÷ 100) for positive odds. A $110 bet at -110 returns $210 total ($100 profit) if it covers.

What is the Kelly Criterion for bet sizing?

The Kelly Criterion is a mathematical formula that determines the optimal percentage of your bankroll to wager given your estimated edge. Kelly % = (b×p − q) / b, where b is net profit per dollar, p is your estimated win probability, and q = 1−p. Most bettors use Half Kelly (50% of full Kelly) to reduce variance while maintaining solid expected growth.

📐 Point Spread Calculator

Check if your bet covers the spread, compute payouts from American odds, and find your optimal bet size with Kelly Criterion.

Quick Presets:

Bet Details

Bet Amount

Point Spread Negative = favorite (−6.5), positive = underdog (+8.5)

Spread Odds American odds (e.g., −110, +105)

Score Result Optional

Your Team Score

Opponent Score

Result

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Net Profit

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Total Payout

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Implied Win %

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Cover Line

Game Margin —

Margin Coverage Zone

Green bars = bet covers; red bars = bet loses.

The Kelly Criterion tells you the mathematically optimal fraction of your bankroll to wager when you have an edge. Enter your estimated win probability to see how much to bet.

Kelly Inputs

Bankroll

Your Win Probability

Your honest edge estimate — not the implied probability

Spread Odds —

Implied Win % —

Kelly Sizing

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Half Kelly % Recommended

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Half Kelly Bet

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Full Kelly %

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Full Kelly Bet

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Your Edge

—

Expected Value

Enter your inputs

REPLACE_BEFORE_LAUNCH. Fill in the labelled inputs for the Point Spread Calculator with realistic numbers so the result reflects your actual situation. The calculator updates instantly.

Read the result

REPLACE_BEFORE_LAUNCH. Review the headline result and supporting detail returned by the calculator. The result card explains what the number means in plain language.

Run a few scenarios

REPLACE_BEFORE_LAUNCH. Adjust the inputs to see how the answer changes. Comparing a conservative and an optimistic scenario reveals which inputs matter most for your decision.

Primary formula

result = compute(inputs)

REPLACE_BEFORE_LAUNCH. Document the real formula the Point Spread Calculator uses, including each variable, its units, and the source for any constants.

Input value REPLACE_BEFORE_LAUNCH. Define the primary input variable that the Point Spread Calculator consumes, including its units and typical range.

Result REPLACE_BEFORE_LAUNCH. Define what the result represents, including units, sign convention, and how to interpret it.

Assumption REPLACE_BEFORE_LAUNCH. Define any default assumption the calculator bakes in so users know when their situation diverges.

Edge case REPLACE_BEFORE_LAUNCH. Define a boundary input where the result behaves differently — useful for users who hit unusual scenarios.

Source REPLACE_BEFORE_LAUNCH. Name the standard, dataset, or methodology the Point Spread Calculator cites so users can verify the calculation.

🧪

Baseline scenario

Typical case

Input 100 Input 0

REPLACE_BEFORE_LAUNCH. Walk through the result for a typical input set, explain what each number means, and point at the input that would move the result most.

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Edge scenario

Stress test

Input 10000 Input 1

REPLACE_BEFORE_LAUNCH. Contrast the stress-test result with the baseline, explain why the answer diverges, and call out the input responsible for the change.

REPLACE_BEFORE_LAUNCH. Write a 2-3 sentence intro that sets up what the Point Spread Calculator computes, who it is for, and what the rest of the article covers.

How the Point Spread Calculator works

REPLACE_BEFORE_LAUNCH. Explain the underlying formula and the assumptions baked into the calculation. Reference the standards, datasets, or authoritative sources you used. Keep paragraphs short and focused on what changes the result.

Inputs and what they mean

REPLACE_BEFORE_LAUNCH. Walk through each input the calculator accepts. State the units, the typical range, and any input that has an outsized effect on the result. Flag inputs that newcomers commonly misunderstand.

Limits and edge cases

REPLACE_BEFORE_LAUNCH. List the situations where the Point Spread Calculator should not be used or where the result needs an expert review. Identify the failure modes that the simple formula cannot model, and tell the reader where to look next.

What does the Point Spread Calculator actually compute?+

REPLACE_BEFORE_LAUNCH. Give a one-paragraph plain-language explanation of the output and the inputs it depends on.

How accurate is this calculator?+

REPLACE_BEFORE_LAUNCH. Explain how the methodology was sourced, the conditions under which the result is reliable, and when a user should double-check with an expert.

What units does the Point Spread Calculator expect?+

REPLACE_BEFORE_LAUNCH. State the units for every input and output. Mention any unit conversion the calculator performs internally so users are not surprised.

Can I share my results?+

REPLACE_BEFORE_LAUNCH. Explain that the calculator encodes state into the URL hash and that copying the URL is enough to share a scenario with a colleague.

Where does the data come from?+

REPLACE_BEFORE_LAUNCH. Name the data sources, authoritative standards, or research backing the formula. Link to them if possible.

📐 Point Spread Calculator

Bet Details

Result

Margin Coverage Zone

Kelly Inputs

Kelly Sizing

How to Use This Calculator

Enter your inputs

Read the result

Run a few scenarios

Formula & Methodology

Key Terms Explained

Real-World Examples

Baseline scenario

Edge scenario

Understanding the Point Spread Calculator

How the Point Spread Calculator works

Inputs and what they mean

Limits and edge cases

Frequently Asked Questions

📐 Point Spread Calculator

Bet Details

Result

Margin Coverage Zone

Kelly Inputs

Kelly Sizing

How to Use This Calculator

Enter your inputs

Read the result

Run a few scenarios

Formula & Methodology

Key Terms Explained

Real-World Examples

Understanding the Point Spread Calculator

How the Point Spread Calculator works

Inputs and what they mean

Limits and edge cases

Frequently Asked Questions

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