import type BigNumber from 'bignumber.js';
/**
 * The internal ID mapping used for each of the possible measures to convert.
 * @public
 */
export declare enum MeasureKind {
    Angle = 0,
    Area = 1,
    Data = 2,
    Energy = 3,
    Force = 4,
    Frequency = 5,
    Illuminance = 6,
    Length = 7,
    Luminance = 8,
    LuminousIntensity = 9,
    Mass = 10,
    Power = 11,
    Pressure = 12,
    Temperature = 13,
    Time = 14,
    Volume = 15
}
export type Numeric = number | BigNumber | (() => number);
/**
 * The kinds of best units to use.
 * @public
 */
export type BestKind = 'metric' | 'imperial';
export type Measure = {
    kind: MeasureKind;
    best: string[] | Record<BestKind, string[]>;
    units: MeasureEntry[];
};
export type MeasureEntry = {
    names: string[];
    symbols?: string[];
    ratio: Numeric;
    difference?: Numeric;
};
export type Conversions = Map<MeasureKind, Measure>;