|Millennium:||1st millennium BC|
|313 BC by topic|
|Gregorian calendar||313 BC
|Ab urbe condita||441|
|Ancient Egypt era||XXXIII dynasty, 11|
|- Pharaoh||Ptolemy I Soter, 11|
|Ancient Greek era||116th Olympiad, year 4|
|Balinese saka calendar||N/A|
|Chinese calendar||丁未年 (Fire Goat)
2384 or 2324
— to —
戊申年 (Earth Monkey)
2385 or 2325
|Coptic calendar||−596 – −595|
|Ethiopian calendar||−320 – −319|
|- Vikram Samvat||−256 – −255|
|- Shaka Samvat||N/A|
|- Kali Yuga||2788–2789|
|Iranian calendar||934 BP – 933 BP|
|Islamic calendar||963 BH – 962 BH|
|Minguo calendar||2224 before ROC
|Thai solar calendar||230–231|
−186 or −567 or −1339
— to —
−185 or −566 or −1338
Year 313 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Cursor and Brutus (or, less frequently, year 441 Ab urbe condita). The denomination 313 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.
- Ptolemy, whose Egyptian kingdom includes Cyprus, puts down a revolt there. A revolt in Cyrene is also crushed.
- Becoming tired of the Macedonian rule, the people of Epirus recall their former king Aeacides. Cassander immediately sends an army against him under his brother, Philip, who is diverted from invading Aetolia.
- Philip defeats Aeacides in a battle. Aeacides, with the remnant of his forces, joins the Aetolians. A second battle takes place, in which Philip is again victorious, and Aeacides is killed. The remaining Aetolian army takes refuge in the surrounding mountains.