Tank Level

Deterministic calculator for a horizontal cylindrical tank. Enter tank diameter + total capacity, then set a measured height to get liters and %.

Inputs are in cm and liters. Slider uses mm internally for smoothness (auto-scaled to tank diameter).

Tool

cm / liters

Tank diameter (cm)

Cylinder diameter (inner).

Total volume (L)

Total tank capacity.

Measured level (cm)

Height from bottom.

Slider

Smooth control (auto max = diameter).

Derived length

—

Computed from volume + diameter.

Capacity

—

Echo of total volume.

How it works

—

Liters

0.0% of 3,300 L

0%100%

Deterministic math. No network calls. Runs entirely in the browser.

Circular segment

We derive the tank length from total volume and diameter: L = V / (πr²).

For a liquid height h (from bottom), the filled cross-sectional area is a circular segment: A = r²·acos((r−h)/r) − (r−h)·√(2rh − h²).

Then volume is V = A·L and we convert m³ → liters.