| Centuries: | 6th century · 7th century · 8th century |
| Decades: | 610s 620s 630s 640s 650s 660s 670s |
| Years: | 646 647 648 649 650 651 652 |
| 649 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 649 DCXLIX |
| Ab urbe condita | 1402 |
| Armenian calendar | 98 ԹՎ ՂԸ |
| Bahá'í calendar | -1195 – -1194 |
| Bengali calendar | 56 |
| Berber calendar | 1599 |
| Buddhist calendar | 1193 |
| Burmese calendar | 11 |
| Byzantine calendar | 6157 – 6158 |
| Chinese calendar | 戊申年十二月十三日 (3285/3345-12-13) — to —
己酉年十一月廿二日(3286/3346-11-22) |
| Coptic calendar | 365 – 366 |
| Ethiopian calendar | 641 – 642 |
| Hebrew calendar | 4409 – 4410 |
| Hindu calendars | |
| - Bikram Samwat | 705 – 706 |
| - Shaka Samvat | 571 – 572 |
| - Kali Yuga | 3750 – 3751 |
| Holocene calendar | 10649 |
| Iranian calendar | 27 – 28 |
| Islamic calendar | 28 – 29 |
| Japanese calendar | |
| Korean calendar | 2982 |
| Thai solar calendar | 1192 |