@brewlab/calc/internationalBitteringUnits.js

Library with methods for calculations used in brewing.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Estimates the bitterness of the beer based on a hop addition as
 * International Bittering Units. This is a estimate of bitterness not an
 * actual measure and the hop addition may yield more or less bitterness
 * than this calculation shows.
 * @param {number} alphaAcids alpha acids as a percentage for this hop addition
 * @param {number} boilTime time in minutes that this hop will be in the boil.
 * for example, a value of 60 means the hops will be in for the entirety of a
 * 60minute boil.
 * @param {number} weight weight in ounces
 * @param {number} volume volume of boil in gallons
 * @returns {number} positive integer of the international bittering units
 * calculation from a single hop addition
 */
function internationalBitteringUnits(alphaAcids, boilTime, weight, volume) {
    const boilFactor = (1 - 2.718281828459045235 ** (-0.04 * boilTime)) / 4.15;
    const utilization = 1.0527601683 * boilFactor * 82.39;
    const ibu = alphaAcids * weight * utilization / volume;
    return ibu;
}
exports.default = internationalBitteringUnits;