Well Volume Calculator

Find the water volume in a well.

Well diameter

Water depth

Water volume 146.88

Formula: gallons = π(d/2/12)² × depth × 7.48

Step-by-step with your numbers:

1. Values used:

2. Well diameter = 6

3. Water depth = 100

5. Water volume = 146.88

Did we solve your problem today?

Estimate the standing water volume in a drilled well.

The math behind it

gallons = π×radius²×water depth (ft)×7.48.

6 in, 100 ft deep → ~147 gal.

Yield?

Volume is separate from flow (gpm) — a small volume can still have high yield.