Vitendo

Betting Odds

Odds Calculator

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Detailed Guide Coming Soon

We're working on a comprehensive educational guide for the Betting Odds in your language. The content below is shown in English.

Ni nini Betting Odds?

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A betting odds calculator converts between fractional (UK), decimal (European), and American (moneyline) odds formats, and computes implied probability and potential profit.

Calkulon makes complex calculations simple — built for students and everyday problem-solvers.

Fomula

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f(x)

Decimal: Profit = (Stake × Odds) − Stake; Fractional a/b: Profit = Stake × a/b; Implied prob = 1 / Decimal odds × 100%

Maelezo ya kigezo

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Ishara	Jina	Kitengo	Maelezo
O	Odds (decimal)	ratio	—
S	Stake wagered	currency	—
P	Probability	%	—

Jinsi ya Betting Odds

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1Decimal odds: profit = (stake × odds) − stake
2Fractional a/b: profit = stake × a/b
3American +200: profit = stake × 2; −150: stake × 100/150
4Implied probability = 1 / decimal odds × 100%

Mifano Iliyotatuliwa

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Mfano 1

Imetolewa:Decimal odds 3.50, £10 stake

Matokeo:Profit = (10×3.50)−10 = £25; Implied probability = 28.6%

Matumizi ya vitendo

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Sports betting strategy

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Comparing odds across bookmakers

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Understanding value bets

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Risk management in gambling

Odds Format Conversion

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Fractional	Decimal	American	Implied prob
1/1 (evens)	2.00	+100	50%
2/1	3.00	+200	33.3%
1/2	1.50	−200	66.7%
5/1	6.00	+500	16.7%

Maswali yanayoulizwa mara kwa mara

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What's the difference between decimal and fractional odds?

Decimal (2.50) shows total return per £1. Fractional (3/2) shows profit only. 3/2 decimal = 2.50.

How do American odds work?

+200 means £100 profit on £100 stake; −150 means need £150 stake to win £100.

Can bookmaker odds differ from true probability?

Yes. Bookmakers add margin (overround) so implied probabilities total >100%.

Regional Guides

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UK/Europe▾

Fractional (1/2) and decimal (1.50) odds most common

USA▾

American moneyline (+150, −200) and decimal increasingly used

Australia▾

Decimal odds standard

Marejeo

›Understanding odds — Betting.com

Formula-verified for precision

Reviewed October 2026

Our methodology

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