The stremma (Greek: στρέμμα, plural στρέμματα) is a Greek unit of land area, equal to 1,000 square metres, also called the 'royal' stremma. The name comes from a root meaning 'to turn', presumably referring to the amount of land that can be plowed/turned in a day.
The "old", "Turkish", or "Ottoman" stremma was approximately 1,270 m² (Λεξικό, 1998): it was the Greek name of the Ottoman dönüm, which was in turn based on the Byzantine stremma (see below). But Lapavitsas uses the value of 1,600 m² for the region of Naoussa in the early 20th century.
One stremma is equivalent to:
- 10,763.9 square feet
- 0.247 105 38 international acres
- 0.247 104 39 U.S. survey acres; 1 acre ≈ 4.047 stremmata
- 0.000 386 102 square miles (statute)
- Λεξικό της κοινής Νεοελληνικής (Dictionary of Modern Greek), Ινστιτούτο Νεοελληνικών Σπουδών, Θεσσαλονίκη, 1998. ISBN 960-231-085-5
- Costas Lapavitsas, "Social and Economic Underpinning of Industrial Development: Evidence from Ottoman Macedonia", Ηλεκτρονικό Δελτίο Οικονομικής Ιστορίας 
- Siriol Davis, "Pylos Regional Archaeological Project, Part VI: administration and settlement in Venetian Navarino", Hesperia, Winter, 2004 
- V.L. Ménage, Review of Speros Vryonis, Jr. The decline of medieval Hellenism in Asia Minor and the process of islamization from the eleventh through the fifteenth century, Berkeley, 1971; in Bulletin of the School of Oriental and African Studies (University of London) 36:3 (1973), pp. 659-661. at JSTOR (subscription required); see also Erich Schilbach, Byzantinische Metrologie (referenced but not seen)