Sports Betting Bankroll Calculator

How it's calculated

On the balanced plan, the unit is bankroll × 100 / 10,000 (1%). Daily, weekly, and open ceilings use 500, 1,500, and 800 basis points of that bankroll. Kelly stake = bankroll × max(0, (b×p - q) / b) × fraction, where b = decimal odds - 1, p is your win probability, and q = 1 - p.

Illustrative example. A $500.00 bankroll on the balanced plan has a $5.00 unit, a $25.00 daily ceiling, a $75.00 weekly ceiling, and a $40.00 open-exposure ceiling. Quarter Kelly at -110 with a 55% win chance suggests $6.88.

What does a sports betting bankroll calculator do?

A sports betting bankroll calculator turns dedicated betting money into planning ceilings: unit size, daily exposure, weekly exposure, and open-exposure limits. Fantasy Forge uses versioned bankroll-plan rules and integer money math. The output is a maximum boundary, not a target and not an instruction to wager.

The calculator does not tell you which bets to place. It only caps how much you might expose at the unit, day, week, and open-book levels so you can stay inside a plan you chose in advance. Bankroll management starts with that unit calculator step: pick a unit you can lose, then stop at the ceiling.

What is Kelly criterion staking?

Kelly criterion staking sizes a stake from American odds and your estimated win probability. Full Kelly can be aggressive when those estimates are uncertain or wrong. Fractional Kelly (for example quarter Kelly) is usually safer and more durable. Kelly is optional here and still a ceiling, not a command to bet.

Kelly is not a promise of growth. If your win-probability estimate is too high, recommended stakes can be far too large. Prefer fractional Kelly, and skip the bet when Kelly is not positive.

What money belongs in a betting bankroll?

Only money specifically set aside for betting that you can afford to lose without affecting rent, bills, debt payments, savings, emergency funds, or other normal expenses. Do not put living costs in a betting bankroll.

Do not treat calculator output as a reason to risk money you cannot afford to lose. Planning ceilings are maximums, not targets.

Is it free?

Yes. The sports betting bankroll calculator is free and does not require an account. Sign up only if you want to save a bankroll plan and return for weekly reviews. Saved bankroll plans still require signup.

You can calculate unit, daily, weekly, and open-exposure ceilings, plus optional Kelly stake sizes, entirely in your browser.

FAQ

What does a sports betting bankroll calculator do?

A sports betting bankroll calculator turns dedicated betting money into planning ceilings: unit size, daily exposure, weekly exposure, and open-exposure limits. Fantasy Forge uses versioned bankroll-plan rules and integer money math. The output is a maximum boundary, not a target and not an instruction to wager.

What is Kelly criterion staking?

Kelly criterion staking sizes a stake from American odds and your estimated win probability. Full Kelly can be aggressive when those estimates are uncertain or wrong. Fractional Kelly (for example quarter Kelly) is usually safer and more durable. Kelly is optional here and still a ceiling, not a command to bet.

What money belongs in a betting bankroll?

Only money specifically set aside for betting that you can afford to lose without affecting rent, bills, debt payments, savings, emergency funds, or other normal expenses. Do not put living costs in a betting bankroll.

Is it free?

Yes. The sports betting bankroll calculator is free and does not require an account. Sign up only if you want to save a bankroll plan and return for weekly reviews. Saved bankroll plans still require signup.