green garden hose

How Many Gallons per Minute Is a Garden Hose?

Garden hoses are a familiar sight in backyards and gardens, serving a wide range of outdoor tasks, from watering plants to washing cars. While they may seem like a simple tool, understanding the flow rate of a garden hose is vital for efficient water use and practical applications. Just how many gallons of water does a standard garden hose deliver per minute? This is the question we aim to answer in this exploration. Recognizing the flow rate of your garden hose not only aids in water conservation but also ensures that it meets the demands of your specific tasks. Let’s begin by delving into the crucial factor of garden hose size.

Flexzilla Garden Hose 5/8 in. x 25 ft, Heavy Duty, Lightweight, Drinking Water Safe, ZillaGreen – HFZG525YW-E
  • EXTREMELY FLEXIBLE – All weather flexibility
  • EXTREMELY DURABLE – Abrasion resistant outer cover and crush resistant anodized aircraft aluminum fittings
  • HYBRID POLYMER – Won’t kink under pressure, coils easily and lays flat with zero memory
  • LIGHTWEIGHT – Lighter than traditional garden hoses making Flexzilla easier to carry and maneuver around the yard
  • LEAK FREE CONNECTIONS AND DRINKING WATER SAFE – A durable O-ring provides long lasting leak free connections and feature an inner tube material that is drinking water safe

Garden Hose Size

To comprehend the gallons per minute (GPM) output of a garden hose, it’s essential to grasp the significance of hose size. Garden hoses come in a variety of diameters, with the most common sizes being 1/2 inch, 5/8 inch, and 3/4 inch. The diameter of the hose directly impacts the amount of water it can deliver. Generally, larger hoses can carry a greater volume of water in a given time frame, resulting in a higher GPM. However, hose size is not the sole determinant; water pressure also plays a significant role in the flow rate. In the sections that follow, we will further explore the relationship between hose size, water pressure, and the practical calculations used to determine the GPM of a garden hose.

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Water Pressure and Flow Rate

Water pressure is a fundamental factor influencing the flow rate of a garden hose. The force at which water flows through the hose is measured in pounds per square inch (PSI). Higher water pressure can significantly increase the GPM output of a hose. When water is supplied with greater force, it can move through the hose more quickly, resulting in a higher volume of water delivered per minute. Conversely, lower water pressure may limit the GPM, affecting the hose’s ability to provide water at the desired rate for specific tasks. Thus, understanding the available water pressure is crucial when determining the effective GPM of a garden hose.

Garden Hose 50ft, Stainless Steel Heavy Duty Water Hose with 10 Function Nozzle Flexible, Lightweight, Kink Free, Pet Proof, Puncture Proof Hose Metal for Yard, Outdoor
  • High Quality Garden Hose Metal : This 50ft water hose is made of high quality stainless steel and thickened PVC making it resistant to breaking under pressure. Withstands pet bites, cactus punctures, dragging over wall edges and floors without rusting, bursting, leaking, tearing or corroding. Takes the hassle out of buying a garden hose every year!
  • Flexible without Kinks : The garden hose body is encased with stainless steel protection that provides consistent, stable and high pressure water output. Non-expandable, ensuring a steady and uninterrupted flow of water. The anti-kink design means the hose can be laid flat with no twists, kinks can easily be run through iron fences, rose bushes and corners. Easy to store and keep your garden tidy!
  • Upgraded Connector Design & Leak-Proof : The water hose is equipped with extended large aluminum connectors andextra-long soft shell design, which is lightweight, sturdy and can be freely dragged on rough surfaces. The metal hose comes with four leak-proof washers. Please remember to install the washers before use to prevent leaks. It’s time to say goodbye to the old leaky hose!
  • 10 Function Nozzles: The nozzles come with ergonomic non-slip rubber grips for easy handling. Equipped with a lockable trigger clip, easy to use without a lot of strength needed. The ten pattern nozzle can work under low and high water pressure to meet your watering needs for the garden/yard/patio/lawn as well as car/window/house/pet cleaning.
  • Connectable Expandability: Each garden hose metal 50ft has connectors on both sides. When a water hose does not reach the length you need, you can connect two hoses to extend the overall length. The heavy-duty garden hose is also easy to roll up and store. The Unywarse steel hose comes packaged in a beautiful cardboard box, perfect as a gift for a friend.

Calculating GPM for a Garden Hose

Calculating the GPM of a garden hose involves a straightforward formula that takes into account both the hose’s diameter and the water pressure. The formula is as follows: GPM = (hose diameter in inches)^2 × (water pressure in pounds per square inch) / 24.

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To illustrate this calculation, let’s consider an example: Suppose you have a garden hose with a 5/8-inch diameter, and the water pressure from your source measures 40 PSI. Using the formula, the GPM would be calculated as follows: GPM = (5/8)^2 × 40 / 24 GPM = (25/64) × 40 / 24 GPM = 0.390625 × 40 / 24 GPM ≈ 0.651 GPM

So, in this example, the garden hose delivers approximately 0.651 gallons per minute. This calculation method allows you to estimate the GPM of your garden hose based on its size and the water pressure available, helping you make informed choices for various outdoor tasks.

Practical Considerations

Understanding the GPM of a garden hose has practical implications for a variety of outdoor tasks. Whether you’re watering a garden, filling a pool, or washing your car, having a hose with an appropriate flow rate is essential. If your hose has a low GPM and you’re attempting to fill a large container, the task may take longer than desired. Conversely, if the hose has a high GPM, it can efficiently deliver the necessary water for your specific needs.

To ensure that your garden hose meets your requirements, it’s advisable to consider both the hose diameter and the water pressure. For tasks that demand a higher flow rate, such as filling a pool quickly, a larger diameter hose and adequate water pressure are ideal. Conversely, for tasks like gentle plant watering, a standard garden hose may suffice. Understanding these practical considerations enables you to make the most of your garden hose and conserve water effectively.

GUKOK Non-Expanding Garden Hose, Ultra Lightweight, Abrasion Resistant, Flexible, Durable, Kink-Free Garden Hose, RV, Marine and Camper Hose, 50-Feet
  • Experience uninterrupted water flow with our non-stretching garden hose, which guarantees no kinks, twists, or tangles even in freezing temperatures.
  • Our garden hose is constructed with sturdy marine-grade material Consistent, high flow equal to a conventional hose Crush-proof inner core, making it a durable investment for your gardening needs.
  • Enjoy the freedom to move around your garden with ease thanks to the 50% lighter weight of our hose compared to traditional hoses.
  • Rest assured that our garden hose is not only durable but also safe for you and your family. It’s BPA-free, lead-free, and phthalate-free, giving you peace of mind as you tend to your garden.
  • With our 1-year warranty, you can be confident in your purchase and trust that you’re investing in a high-quality garden hose that will meet your needs for years to come.


In conclusion, the flow rate of a garden hose, measured in gallons per minute (GPM), is a crucial factor to consider for both water conservation and practical applications. Hose size and water pressure play integral roles in determining the GPM of a garden hose. A larger diameter hose, combined with sufficient water pressure, can deliver a higher GPM, making it suitable for tasks requiring a generous flow of water. On the other hand, standard hoses may be adequate for less demanding tasks.

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By understanding the dynamics of garden hose flow rates, you can make informed decisions when selecting the right hose for your outdoor activities. This knowledge empowers you to conserve water and ensure that your hose meets the specific demands of your gardening, cleaning, and watering needs. In the end, knowing the GPM of your garden hose enhances your ability to efficiently manage water resources while getting the job done effectively.

About the author

Victoria Nelson

Victoria Nelson is a passionate gardener with over a decade of experience in horticulture and sustainable gardening practices. With a degree in Horticulture, she has a deep understanding of plants, garden design, and eco-friendly gardening techniques. Victoria aims to inspire and educate gardeners of all skill levels through her engaging articles, offering practical advice drawn from her own experiences. She believes in creating beautiful, biodiverse gardens that support local wildlife. When not writing or gardening, Victoria enjoys exploring new gardens and connecting with the gardening community. Her enthusiasm for gardening is infectious, making her a cherished source of knowledge and inspiration.

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