A mithqál is a unit of weight. The weight of the traditional mithqál used in the Middle East is equivalent to 24 201 nákhuds. However, the mithqál used by the Bahá’ís consists of 19 nákhuds, “in accordance with the specification of the Bayán” (Q and A 23). The weight of nine of these mithqáls equals 32.775 grammes or 1.05374 troy ounces.

In relation to the application of the fine, Bahá’u’lláh clearly specifies that each succeeding fine is double the preceding one (Q and A 23); thus the fine imposed increases in geometrical progression. The imposition of this fine is intended for a future condition of society, at which time the law will be supplemented and applied by the Universal House of Justice.