import type { IsoDuration } from '../../domain.objects/IsoDuration';
export declare const DAYS_PER_WEEK = 7;
export declare const HOURS_PER_DAY = 24;
export declare const MINUTES_PER_HOUR = 60;
export declare const SECONDS_PER_MINUTE = 60;
export declare const MILLISECONDS_PER_SECOND = 1000;
export declare const MILLISECONDS_PER_MINUTE: number;
export declare const MILLISECONDS_PER_HOUR: number;
export declare const MILLISECONDS_PER_DAY: number;
export declare const MILLISECONDS_PER_WEEK: number;
export declare const DAYS_PER_YEAR = 365.25;
export declare const DAYS_PER_MONTH = 30.44;
export declare const MILLISECONDS_PER_MONTH: number;
export declare const MILLISECONDS_PER_YEAR: number;
/**
 * .what = converts duration to milliseconds
 * .why = enables duration arithmetic and comparison
 * .note = years and months use approximate values (365.25 days/year, 30.44 days/month)
 */
export declare const toMilliseconds: (duration: IsoDuration) => number;