Tank Volume Calculator
Despite the general name, this tool computes the volume of a vertical cylindrical tank only, as pi x r^2 x h, and also converts it to US gallons. A radius of 3 ft and height of 6 ft give about 169.646 cubic ft.
What this calculator does
The Tank Volume Calculator estimates your result instantly from the values you enter, using standard math & conversions formulas. Despite the general name, this tool computes the volume of a vertical cylindrical tank only, as pi x r^2 x h, and also converts it to US gallons. A radius of 3 ft and height of 6 ft give about 169.646 cubic ft. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.
Result
About Tank Volume Calculator
The Tank Volume Calculator computes the capacity of a vertical cylindrical tank from its radius and height using pi x r^2 x h, then converts the result to US gallons. It handles the cylinder shape only, not rectangular or capsule tanks.
Formula & Mathematical Calculation
Volume (cubic ft) = f(Radius (ft), Height (ft))
Calculated according to standard math formulas implemented in the calculator core.
Calculation Example
Enter a Radius of 3 ft and a Height of 6 ft, then click Calculate. The result boxes show:
Volume (cubic ft): 169.646
US Gallons: 1269.04
The note reads: Vertical cylinder volume = pi x r^2 x h = 169.646 cubic ft (1269 gal).
Key Benefits
- Calculates vertical cylinder tank volume from radius and height
- Uses the standard pi x r^2 x h formula
- Also converts the volume to US gallons using 7.48052
- Rejects negative dimensions with a clear message
How to Use this Calculator
-
Enter the dimensions
Type the tank radius and height in feet into the Radius (ft) and Height (ft) fields. -
Calculate
Click Calculate. -
Read volume and gallons
Read the Volume (cubic ft) and US Gallons boxes.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
- Results use standard published formulas and account only for the values entered above.
- Rounding is applied for display; the underlying calculation uses your full precision.
- Results are returned in the same units you enter, unless the tool states the output unit.
What it does not cover
- Tank Volume Calculator produces a calculated result for reference and learning, not a certified or official measurement.
- Real-world outcomes differ when tolerances, rounding rules or local standards apply.
- Definitions and standards vary by region and change over time; verify the convention that applies to your case.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For work where the result carries real consequences, confirm it against an authoritative source.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.