| Millennium: | 2nd Millennium BC |
|---|---|
| Centuries: | 18th cent. BC – 17th cent. BC – 16th cent. BC |
| Decades: | 1670s BC 1660s BC 1650s BC – 1640s BC – 1630s BC 1620s BC 1610s BC |
| Years: | 1650 BC 1649 BC 1648 BC – 1647 BC – 1646 BC 1645 BC 1644 BC |
| Gregorian calendar | 1647 MDCXLVII |
| Ab urbe condita | 2400 |
| Armenian calendar | 1096 ԹՎ ՌՂԶ |
| Assyrian calendar | 6397 |
| Bengali calendar | 1054 |
| Berber calendar | 2597 |
| English Regnal year | 22 Cha. 1 – 23 Cha. 1 |
| Buddhist calendar | 2191 |
| Burmese calendar | 1009 |
| Byzantine calendar | 7155–7156 |
| Chinese calendar | 丙戌年 (Fire Dog) 4343 or 4283 — to — 丁亥年 (Fire Pig) 4344 or 4284 |
| Coptic calendar | 1363–1364 |
| Discordian calendar | 2813 |
| Ethiopian calendar | 1639–1640 |
| Hebrew calendar | 5407–5408 |
| Hindu calendars | |
| - Vikram Samvat | 1703–1704 |
| - Shaka Samvat | 1568–1569 |
| - Kali Yuga | 4747–4748 |
| Holocene calendar | 11647 |
| Igbo calendar | 647–648 |
| Iranian calendar | 1025–1026 |
| Islamic calendar | 1056–1057 |
| Japanese calendar | Shōhō 4 (正保４年) |
| Javanese calendar | 1568–1569 |
| Julian calendar | Gregorian minus 10 days |
| Korean calendar | 3980 |
| Minguo calendar | 265 before ROC 民前265年 |
| Nanakshahi calendar | 179 |
| Thai solar calendar | 2189–2190 |
The year 1647 BC