Guides & articles
Cylinder volume guides & articles
In-depth guides that go beyond the calculator — how to measure real tanks, when the simple formula does not apply, and how to avoid the common unit mistakes.
Guides in progress
These long-form articles are being written. In the meantime, each calculator page includes its own worked example and FAQ.
Horizontal vs vertical storage tanks: which holds more, and whyHow tank orientation changes usable capacity, dip readings and the maths behind each. (coming soon)
Reading a cylindrical tank: turning a dip measurement into volumeA practical guide to gauging partly full tanks accurately. (coming soon)
US gallon vs Imperial gallon: the 20% difference that trips people upWhere the two gallons come from and how to avoid mixing them. (coming soon)