| Centuries: | 8th century - 9th century - 10th century |
| Decades: | 810s 820s 830s - 840s - 850s 860s 870s |
| Years: | 846 847 848 - 849 - 850 851 852 |
| 849 by topic | |
| Politics | |
| State leaders - Sovereign states | |
| Birth and death categories | |
| Births - Deaths | |
| Establishment and disestablishment categories | |
| Establishments - Disestablishments | |
| Gregorian calendar | 849 DCCCXLIX |
| Ab urbe condita | 1602 |
| Armenian calendar | 298 ԹՎ ՄՂԸ |
| Bahá'í calendar | -995 – -994 |
| Berber calendar | 1799 |
| Buddhist calendar | 1393 |
| Burmese calendar | 211 |
| Chinese calendar | 3485/3545-12-3 (戊辰年十二月初三日) — to —
3486/3546-intercalary 11-13(己巳年閏十一月十三日) |
| Coptic calendar | 565 – 566 |
| Ethiopian calendar | 841 – 842 |
| Hebrew calendar | 4609 – 4610 |
| Hindu calendars | |
| - Vikram Samvat | 904 – 905 |
| - Shaka Samvat | 771 – 772 |
| - Kali Yuga | 3950 – 3951 |
| Holocene calendar | 10849 |
| Iranian calendar | 227 – 228 |
| Islamic calendar | 234 – 235 |
| Japanese calendar | |
| Korean calendar | 3182 |
| Thai solar calendar | 1392 |