| Călmățui | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Olt, Teleorman |
| Length: | 139km (86miles) |
| Mouth: | Danube |
| Mouth Coordinates: | 43.7009°N 25.1904°W |
| Basin Size: | 1413km2 |
| Tributaries Left: | Călmățuiul Sec, Urlui |
| Tributaries Right: | Sodol, Ducna |
The Călmățui is a left tributary of the river Danube in Romania. It discharges into the Danube near Suhaia.[1] It flows through the villages Stoicănești, Radomirești, Călinești, Crângeni, Călmățuiu, Salcia, Putineiu, Dracea, Crângu, Lisa and Viișoara. Its length is 139km (86miles) and its basin size is 1413km2.