The hectare, however, remains as a non-SI unit accepted for use with the SI and whose use is "expected to continue indefinitely".

[4] In practice the hectare is fully derived from the SI, being equivalent to a square hectometre.

[citation needed] Others, such as South Africa, published conversion factors which were to be used particularly "when preparing consolidation diagrams by compilation".

[12] In many countries, metrification redefined or clarified existing measures in terms of metric units.

The law of 18 Germinal, Year III (7 April 1795) defined five units of measure:[18] In 1960, when the metric system was updated as the International System of Units (SI), the are did not receive international recognition.

The decimilliare (dma, sometimes seen in cadastre area evaluation of real estate plots) is 1⁄10,000 are or one square decimetre.

[28] It is still commonly used in speech to measure real estate, in particular in Indonesia, India, and in various European countries.

describe the size of suburban dacha or allotment garden plots or small city parks where the hectare would be too large.