Betting Profit Calculator

How bet profit is calculated

The math is straightforward but worth understanding because different odds formats hide the underlying calculation.

For decimal odds, the formula is: payout equals stake multiplied by decimal odds. Net profit equals stake multiplied by (decimal odds minus 1). A 100 euro bet at 2.50 returns 250 euro total payout, which is 150 euro net profit plus the 100 euro stake returned.

For fractional odds (3/1, 5/2, 7/4, etc.), the formula is: profit equals stake multiplied by numerator divided by denominator. Payout is profit plus stake. A 20 euro bet at 5/2 profits 20 multiplied by 5 divided by 2, equal to 50 euro profit plus the 20 stake, totalling 70 euro returned.

For American odds, the formula splits into positive and negative cases. Positive American odds: profit equals stake multiplied by American odds divided by 100. Negative American odds: profit equals stake multiplied by 100 divided by absolute American odds. A 100 euro bet at +150 profits 150 euro. A 150 euro bet at -150 profits 100 euro.

A worked example

The implied probability is useful because it sets the threshold for whether the bet has value. If you estimate Brazil's real probability above 55.6 percent, the bet has value. If you estimate below, it does not.

Profit at typical odds levels

For a 100 euro stake, here are payouts and profits at common odds.

• 1.50: payout 150, profit 50
• 1.65: payout 165, profit 65
• 1.80: payout 180, profit 80
• 2.00: payout 200, profit 100
• 2.50: payout 250, profit 150
• 3.00: payout 300, profit 200
• 5.00: payout 500, profit 400
• 10.00: payout 1000, profit 900

The linear relationship makes profit easy to compute mentally for any stake by scaling up or down. A 25 euro bet at 1.80 profits 25 multiplied by 0.80, equal to 20 euro.

Tax considerations

In most European jurisdictions, sports betting winnings are tax-free for the bettor (the bookmaker pays gambling duty instead). The UK, Ireland, Germany, and most Scandinavian countries follow this model. In the United States, sports betting winnings are taxable as ordinary income at the federal level and often at state level, with mandatory withholding above certain thresholds.

Always check the tax rules in your jurisdiction before assuming the payout shown by a calculator is your net take-home profit. The figures returned by this calculator are gross profit; any applicable taxes need to be subtracted separately.

Stake size relative to bankroll

The profit calculator answers the question "how much will I win on this bet" but not "how much should I bet". The two are different. Stake size should be determined by your bankroll, your edge, and your risk tolerance, not by the appeal of a large potential payout.

The standard professional recommendation is flat-stake 1 to 2 percent of bankroll per bet, or use the Kelly criterion for bets with calculable edge. For a 1000 euro bankroll, that means 10 to 20 euro per bet, regardless of how attractive the odds look. Larger stakes increase variance and the risk of bankroll depletion during inevitable losing streaks.

If you find yourself wanting to stake a larger percentage because the potential payout is large, that is exactly when you should resist. The big-payout temptation is the most common path to bankroll destruction in retail betting.