import { DurationInput } from './types';
import { UNITS_META_MAP } from './lib/units';
/**
 * Convert the input value to milliseconds represented by a duration object.
 * If a number is passed this is returned verbatim as the number
 * of milliseconds.
 *
 * @example toMilliseconds({ days: 1 }) // 86400000
 */
export declare const toMilliseconds: (duration: DurationInput) => number;
/**
 * Convert the input value to the specificed unit.
 * @example toUnit({ minutes: 2 }, 'seconds') // 120
 */
export declare const toUnit: (duration: DurationInput, unit: keyof typeof UNITS_META_MAP) => number;
/**
 * Convert the input value to seconds.
 * @example toSeconds({ minutes: 2 }) // 120
 */
export declare const toSeconds: (duration: DurationInput) => number;
/**
 * Convert the input value to minutes.
 * @example toMinutes({ hours: 1, minutes: 10 }) // 70
 */
export declare const toMinutes: (duration: DurationInput) => number;
/**
 * Convert the input value to hours.
 * @example toHours({ days: 1 }) // 24
 */
export declare const toHours: (duration: DurationInput) => number;
/**
 * Convert the input value to days.
 * @example toDays({ hours: 12 }) // 0.5
 */
export declare const toDays: (duration: DurationInput) => number;
/**
 * Convert the input value to weeks.
 * @example toWeeks({ days: 14 }) // 2
 */
export declare const toWeeks: (duration: DurationInput) => number;
/**
 * Convert the input value to months.
 * Note, this is a rough approximation as the length of a month is variable.
 *
 * @example toMonths({ months: 10, days: 365 }) // 11
 */
export declare const toMonths: (duration: DurationInput) => number;
/**
 * Convert the input value to years.
 * Note, this is a rough approximation as the length of a year is variable.
 *
 * @example toYears({ years: 10, days: 365 }) // 11
 */
export declare const toYears: (duration: DurationInput) => number;