Water Tank Volume Calculator
Calculate storage volume for common tank shapes.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
How to use this calculator
Choose tank shape and enter dimensions.
What the math is doing
Volume = length × width × height.
Frequently asked questions
Cylindrical tanks?
Use V = π r² h separately.
Freeboard?
Subtract air gap from height.
Potable liner?
Material compatibility matters.
Overflow?
Size per local storm rules.