Free tool · same maths as our alerts

Each-way Kelly calculator

Size a stake from the bookmaker price against Betfair win and place lays. This is the same each-way Kelly formula WisePunt uses when it decides whether to send an alert.

Minimum £100. Default matches WisePunt’s sample bankroll of £10,000.

Fractional (6/1, 9/2) or decimal (7.0, 5.5).

Best available lay prices on Betfair Exchange. No commission is applied in this formula.

Value

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Derived place odds
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Kelly % of bankroll
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Not betting advice. 18+ · BeGambleAware.org · Please gamble responsibly.

How this works

Place odds = 1 + (win odds − 1) × place fraction. So 6/1 at 1/5 becomes 2.20.

True win and place probabilities come from the Betfair lay prices (1 ÷ lay). The place-only probability is the place lay minus the win lay.

Kelly then sizes a fraction of your bankroll for the full each-way bet. The suggested stake is that amount split across both parts and rounded to the nearest £5 per part.

WisePunt only alerts when the suggested stake is above £0. The number of places (e.g. 3 places) is shown for reference and is not used in the maths — only the place fraction is.

Want this done for you on every UK card? Start a 7-day free trial of WisePunt Full (£25/month), or try the Bet Tracker (£10/month) to log your own bets.