| Calul | |
| Name Other: | Calu |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Neamț County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Poieni, Piatra Șoimului |
| Length: | 20km (10miles) |
| Mouth: | Bistrița |
| Mouth Location: | Piatra Șoimului |
| Mouth Coordinates: | 46.8381°N 26.4839°W |
| Basin Size: | 62km2 |
| Tributaries Left: | Falcău, Stăunoi |
The Calul or Calu is a right tributary of the river Bistrița in Romania. It discharges into the Bistrița in Piatra Șoimului, near Roznov.[1] Its length is 20km (10miles) and its basin size is 62km2.