About

Knowing the internal volume of a hose is useful for precise applications such as priming irrigation pumps, calculating pesticide dilution in sprayer lines, or understanding dead-volume in hydraulic systems. For fire safety, understanding the weight added to a charged line is critical for handling. This tool computes the static water volume within the tubing. It also estimates the "Time to Fill" (priming time) based on standard household flow rates, helping users anticipate the delay before water reaches the nozzle.

Formulas

Volume V is calculated using the internal cross-sectional area and length.

V = π × (d2)² × L

Time to Fill t is derived from the Flow Rate Q:

t = VQ

Reference Data

Diameter	Use Case	Vol per 100ft (Gal)	Vol per 100ft (Liters)
1/2"	Light Garden	1.02	3.9
5/8"	Standard Garden	1.60	6.0
3/4"	Heavy Duty / Farm	2.30	8.7
1.5"	Fire Attack Line	9.18	34.7
2.5"	Fire Supply Line	25.50	96.5

Frequently Asked Questions

Yes. While this tool calculates volume, keep in mind that friction loss increases with length. A longer, narrower hose (like 1/2 inch) will reduce the flow rate significantly compared to a 3/4 inch hose.

Water weighs about 8.34 lbs per gallon. A standard 50ft garden hose (5/8") holds about 0.8 gallons, adding roughly 6.7 lbs to the hose's dry weight.

Most residential spigots deliver between 6 and 12 Gallons Per Minute (GPM), depending on household pressure and pipe diameter.