Calculators

Calc Kelly

Fractional Kelly stake. FREE. iter-75 deploy / #456.

Returns the optimal stake size given a bankroll, the price you can bet at, your estimated win probability, and a fraction-of-Kelly multiplier (most bettors use 0.25-0.5 Kelly to avoid overbetting on noisy win-prob estimates).

expected_value_usd is the +EV in dollars (positive means the bet is +EV at your win_prob; negative means -EV). If the Kelly stake is negative, the math says don't bet.

get/v1/calc/kelly

Request

  • Base URL: https://parlay-api.com
  • URL: https://parlay-api.com/v1/calc/kelly
  • Auth: none declared

Query parameters

bankrollnumber required

Total bankroll in USD

oddsstring required

Bet price (American or decimal, e.g. '-110' or '1.91')

win_probnumber required

Your estimated win probability (0 < p < 1)

fractionnumber

Kelly fraction multiplier (0.25 = quarter Kelly)

Response

Successful Response

unknown required

Changes

No recorded changes to this operation across all 1 revision of this API.