How to Use Well Volume Calculator
The Well Volume Calculator estimates the volume of water in a cylindrical well, borehole or shaft. Choose diameter or radius, enter the value with a unit, then enter the actual water depth. The Well Volume Calculator outputs the volume in m³, L, US gallons and ft³.
- Pick input mode — diameter or radius.
- Enter size and unit — inner diameter for accurate volume.
- Enter water depth — the actual liquid column height.
Formula & Theory — Well Volume Calculator
The Well Volume Calculator uses the cylinder formula:
V = π × (D / 2)² × h
or
V = π × r² × h| Symbol | Meaning |
|---|---|
| D | Well inner diameter |
| r | Well inner radius |
| h | Actual water depth |
Assumptions and Limits
The Well Volume Calculator assumes a perfect cylinder. Real wells with stepped diameters or irregular shapes should be treated as estimates.
Use Cases for Well Volume Calculator
- Drinking water wells — estimate refill or pump-out volume.
- Construction sumps — plan dewatering pumps.
- Aquaculture pits — estimate stocking volume.
- Geothermal boreholes — estimate water column for grouting.