A typical garden hose moves about 300 to 1,020 gallons per hour, based on hose diameter, length, water pressure, and whether the end is wide open or fitted with a nozzle.
Garden hoses can dump a lot more water than most people expect. Leave one running for an hour and you may send out a few hundred gallons, or well over 1,000 if the hose is wide, short, and fed by strong household pressure. That range is why two people can both say, “My hose runs hard,” and still be talking about flow rates that are nowhere close.
If you want a clean working number, start here: a standard 5/8-inch garden hose on normal home pressure often lands around 9 to 17 gallons per minute. Multiply that by 60, and you get about 540 to 1,020 gallons per hour. A smaller 1/2-inch hose often lands lower. A 3/4-inch hose can move more.
What Sets The Flow Rate
The water coming through your hose is shaped by four things: hose diameter, hose length, supply pressure, and what’s attached at the end. Each one changes the result.
Hose diameter changes everything
The inside width of the hose is usually the biggest factor. A wider hose carries more water with less squeeze. That’s why a 3/4-inch hose can outflow a 1/2-inch hose by a wide margin even when both are hooked to the same spigot.
Longer hoses lose flow
Water rubbing along the inside wall of the hose creates friction. The longer the run, the more pressure you lose before the water reaches the end. A short hose can feel punchy. A 100-foot hose of the same diameter usually feels softer and slower.
Household pressure matters
Most homes fall somewhere around 40 to 60 psi at an outdoor faucet. On the lower end, hourly flow drops. On the higher end, it rises. If your house has weak pressure, a big hose will still help, though it won’t perform like the same hose on a stronger supply.
Nozzles and sprinklers cut the raw output
An open hose end gives you the highest free-flow rate. Add a spray nozzle, wand, sprinkler, or timer valve and the number drops. Sometimes it drops a little. Sometimes it falls hard, especially with fine mist settings or long oscillating sprinklers.
How Much Water Flows Through A Garden Hose Per Hour?
For most homes, here’s the plain answer in gallons per hour:
- 1/2-inch hose: about 300 to 660 gallons per hour
- 5/8-inch hose: about 540 to 1,020 gallons per hour
- 3/4-inch hose: about 900 to 1,500 gallons per hour
Those numbers fit a normal outdoor spigot and a hose that is not miles long or badly kinked. They reflect what most people mean when they ask about a garden hose, not a farm line or a fire hose setup.
Washington State University’s garden hose flow calculator shows the same pattern: bigger diameter, shorter length, and stronger pressure all raise the flow rate. That lines up with what you see in the yard when one hose fills a bucket fast and another seems to drag.
Common Hourly Flow Ranges By Hose Setup
The table below gives practical estimates for free-flowing water at the hose end. It’s broad on purpose, since real homes don’t all sit at the same pressure.
| Hose setup | Approx. flow | Per hour |
|---|---|---|
| 1/2-inch, 25 ft, lower pressure | 5 gpm | 300 gph |
| 1/2-inch, 50 ft, mid pressure | 7 gpm | 420 gph |
| 1/2-inch, 100 ft, mid pressure | 6 gpm | 360 gph |
| 5/8-inch, 25 ft, lower pressure | 9 gpm | 540 gph |
| 5/8-inch, 50 ft, mid pressure | 12 gpm | 720 gph |
| 5/8-inch, 100 ft, higher pressure | 14 gpm | 840 gph |
| 3/4-inch, 25 ft, mid pressure | 16 gpm | 960 gph |
| 3/4-inch, 50 ft, higher pressure | 20 gpm | 1,200 gph |
| 3/4-inch, 100 ft, strong supply | 25 gpm | 1,500 gph |
These are sensible estimating numbers, not lab figures. A bent connector, a cheap shutoff, mineral buildup, or a half-closed spigot can pull them down. A short, wide hose on a high-pressure bib can beat them.
How To Measure Your Own Hose In Under A Minute
If you want the real number for your house, don’t guess. Test it. The easiest method is the bucket test.
- Grab a bucket with a known size, such as 5 gallons.
- Turn the hose on the way you’d normally use it.
- Time how many seconds it takes to fill the bucket.
- Use this formula: gallons in bucket ÷ seconds × 60 = gallons per minute.
- Then multiply that result by 60 to get gallons per hour.
Say your 5-gallon bucket fills in 25 seconds. That works out to 12 gallons per minute, or 720 gallons per hour. The math is simple, and it beats using a rough average when you’re trying to plan watering time.
The University of New Hampshire Extension lays out the same 5-gallon bucket method for measuring water flow. It’s the fastest way to turn your hose from a guess into a real number.
Test the way you actually water
If you water with a nozzle, test with the nozzle on. If you use a sprinkler, test the sprinkler setup. Free-flow numbers help with a raw hose. Watering plans work better when the test matches real use.
What Those Numbers Mean For Watering
Once you know the hourly flow, everyday jobs get easier to judge. You stop eyeballing and start timing.
Hand watering beds and pots
A hose that runs 600 gallons per hour is sending 10 gallons each minute. If you water a bed for six minutes, that is about 60 gallons total. Spread over a big planting area, that may be fine. Dumped into one spot, it can be too much in a hurry.
Filling cans, bins, and kiddie pools
This is where hourly flow becomes handy. A hose at 720 gallons per hour fills a 30-gallon container in about two and a half minutes. A slower hose at 360 gallons per hour takes about five minutes.
Running a sprinkler
Sprinklers don’t always pass the full hose flow. They trade raw volume for pattern and coverage. So if your hose can move 12 gpm, your sprinkler may deliver less than that across the lawn. That’s normal. The hose is the supply line. The sprinkler is a restriction point.
| Job | Water used | Time at 720 gph |
|---|---|---|
| Fill a 2-gallon watering can | 2 gallons | 10 seconds |
| Fill a 5-gallon bucket | 5 gallons | 25 seconds |
| Fill a 30-gallon tote | 30 gallons | 2.5 minutes |
| Run water for 15 minutes | 180 gallons | 15 minutes |
| Run water for 1 hour | 720 gallons | 1 hour |
Ways To Get More Flow Or Waste Less
If your hose feels weak, the fix is often simple.
- Use a wider hose if you’re still on 1/2-inch.
- Shorten the hose run when you can.
- Open the spigot fully.
- Check for kinks, crushed spots, and clogged washers.
- Swap out nozzles that choke the stream too much.
If the flow feels strong but your water bill does too, the hourly number can be a wake-up call. A hose at 720 gallons per hour can burn through water fast during casual watering or a forgotten fill. The EPA’s Fix a Leak Week page is a good reminder that even small water losses add up over time. A garden hose left running is on a whole different scale.
When The Usual Estimate Misses
There are times when the standard “about 540 to 1,020 gallons per hour” answer won’t fit. If you’re on a well system, use a pressure regulator, share the line with other fixtures, or have a long uphill run, your number can sit lower. If you have stout pressure and a short 3/4-inch hose, it can sit higher.
That’s why the best plain-English answer is this: most garden hoses deliver a few hundred to around 1,000 gallons per hour, and the only way to pin down your own setup is to test it. Once you do, watering times stop being guesswork.
References & Sources
- Washington State University.“Garden Hose Flow and Time Calculator.”Shows how hose diameter, length, and supply pressure change free-flow garden hose output.
- University of New Hampshire Extension.“Irrigation Systems for the Garden.”Explains the bucket-fill method for measuring actual gallons per minute from a hose or irrigation line.
- U.S. Environmental Protection Agency.“Fix a Leak Week.”Provides official water-waste figures that help frame how quickly outdoor water use can add up.