Read the fraction
Fractional odds of 5/1 mean five units of profit for each one unit staked, plus the original stake if successful. A €10 stake at 5/1 therefore has €50 potential profit and €60 gross return.
The first number is potential profit and the second is stake. Fractions can be reduced, such as 4/2 to 2/1, without changing the ratio.
Convert to decimal
Divide the first number by the second and add one. For 5/1, that is 5 ÷ 1 + 1 = 6.00 decimal odds. For 2/5, it is 2 ÷ 5 + 1 = 1.40.
Decimal odds include the returned stake in the total-return multiplier; fractional odds state profit only.
Check the market format
Some displays let you choose the odds format in account settings. Confirm which format is shown before entering a price into a calculator.
The converter supports the common formats. For payout arithmetic, use the decimal equivalent or the return calculator.
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