643 BC

Millennium: 1st millennium BC
Centuries:
Decades:
Years:
643 BC in various calendars
Gregorian calendar643 BC
DCXLIII BC
Ab urbe condita111
Ancient Egypt eraXXVI dynasty, 22
- PharaohPsamtik I, 22
Ancient Greek era34th Olympiad, year 2
Assyrian calendar4108
Balinese saka calendarN/A
Bengali calendar−1235
Berber calendar308
Buddhist calendar−98
Burmese calendar−1280
Byzantine calendar4866–4867
Chinese calendar丁丑年 (Fire Ox)
2055 or 1848
    — to —
戊寅年 (Earth Tiger)
2056 or 1849
Coptic calendar−926 – −925
Discordian calendar524
Ethiopian calendar−650 – −649
Hebrew calendar3118–3119
Hindu calendars
 - Vikram Samvat−586 – −585
 - Shaka SamvatN/A
 - Kali Yuga2458–2459
Holocene calendar9358
Iranian calendar1264 BP – 1263 BP
Islamic calendar1303 BH – 1302 BH
Javanese calendarN/A
Julian calendarN/A
Korean calendar1691
Minguo calendar2554 before ROC
民前2554年
Nanakshahi calendar−2110
Thai solar calendar−100 – −99
Tibetan calendar阴火牛年
(female Fire-Ox)
−516 or −897 or −1669
    — to —
阳土虎年
(male Earth-Tiger)
−515 or −896 or −1668

The year 643 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 111 Ab urbe condita . The denomination 643 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.