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Soaker Hose Run Time Calculator
How long to run a soaker hose to apply a target depth of water to a bed.
Soaker Hose Run Time Calculator
Chlorova · updated for 2026
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Click “Calculate” to see your results.
The output figures are per 100 feet of hose at a typical low line pressure — a shorter hose laid in a bigger bed delivers proportionally less than assumed here, and long runs lose pressure toward the far end so the tail barely weeps. Soil type changes how deep an inch actually soaks, and heavy clay that sheds water needs shorter, repeated cycles rather than one long run the calculator cannot see.
The soaker hose run time calculator answers the one question every soaker owner has — how long do I leave it on? Enter the bed area, the depth of water you want to apply and the type of soaker you own, and it returns the gallons the bed needs, your hose's approximate output, and the run time in minutes to deliver it. It works the same way a sprinkler run-time tool does, but for the slow, low-pressure weeping of a soaker line rather than overhead spray.
How to Use the Soaker Calculator
- Pick the soaker type that matches the hose you laid down.
- Enter the square footage of the bed the hose is watering.
- Set the target water depth — one inch is the standard weekly soak.
- Read the total gallons that depth requires over the area.
- Note the hose output in gallons per hour for your type.
- Run the timer to the minutes the calculator returns.
- Confirm with a coffee-can test on your real soil and pressure.
- Split long run times into cycles on heavy clay that sheds water.
How Soaker Run Time Is Worked Out
An inch of water over a square foot is about 0.623 gallons, so the bed's demand is the area times it times the depth you want. Your soaker's output, in gallons per hour, comes from the hose type — around forty for a standard line, sixty for a heavy weeper and twenty for a slow drip line. Run time is the demand divided by the hourly output in minutes. A one-inch soak over a thirty-two square-foot bed needs about twenty gallons, which a standard soaker delivers in roughly half an hour.
Why the output figure is only a starting point: soaker ratings assume the full hundred feet running at good line pressure, so a shorter hose or low tap pressure means less water than table implies. The honest way to calibrate is the can test — set a few open containers across the bed, run the hose for a fixed time, and measure what landed. That single check turns an estimate into a schedule tuned to your own soil, slope and pressure.
Worked Example: Watering a Raised Bed
- You have a four-by-eight raised bed, so thirty-two square feet.
- The weekly target is one deep inch of water at the roots.
- Demand: 32 × 0.623 × one ≈ twenty gallons in the bed.
- A standard porous soaker is rated near forty gallons an hour.
- Run time: twenty ÷ forty = half an hour at low pressure.
- Set the timer for thirty minutes and let the line crawl slowly on low tap pressure.
- Run the coffee-can test once, then adjust the minutes to your real output.
- On clay, split the soak into two fifteen-minute cycles so the water infiltrates slowly instead of running off the surface before it can sink in.
Soaker Output and Run Time
Approximate gallons per hour and the run time to apply one inch over a forty square-foot bed for common soaker types. Actual output varies with line pressure and hose length, so treat these as a first guess and confirm with a can test in your own garden.
| Soaker type | Gal per hour | Min for 1 in / 40 sq ft |
|---|---|---|
| Standard porous | 40 | 37 |
| Heavy weeper | 60 | 25 |
| Drip line | 20 | 74 |
| Wall-of-water | 30 | 50 |
Key Terms
- Soaker hose
- A porous or perforated hose that weeps water slowly along its length at low pressure.
- Application depth
- The inches of water delivered over an area; one inch per week is the common vegetable target.
- Can test
- Placing open containers in the bed to measure how much water a system actually applies.
- Line pressure
- The tap or hose pressure driving the soaker; low pressure cuts output and evens the weep.
- Infiltration rate
- How fast soil absorbs water — clay is slow, so long soaks should be split into cycles.
What This Means for Watering Well
- Run soakers on low pressure and let them crawl — high pressure wastes water out of the near end and barely reaches the far end, defeating the point of slow irrigation.
- The can test beats any calculator, because real output drifts with pressure, length and age; a few coffee cans across the bed beat a precise-looking catalog figure.
- Bury or mulch over the hose — a soaker under straw or fabric loses far less to evaporation and pushes water down to roots instead of onto the surface.
- Match run time to soil, not just to gallons: sand takes an inch in minutes, while clay will shed a third of it, so clay wants shorter repeated cycles.
- Group plants by thirst on separate lines — one loop for thirsty tomatoes, another for shallow herbs lets each water on its own schedule instead of compromising the whole bed.
Common Mistakes & Fixes
- Sizing run time from the catalog gallons-per-hour and never doing a can test on your own pressure and hose length.
- Running soakers at full tap pressure so the near end floods and the far end stays dry instead of weeping evenly down the line.
- Laying hose on top of mulch where sun and evaporation steal the water before it reaches the root zone.
- Giving a heavy clay bed one long soak the calculator says is needed, then most of it runs off the surface before it ever infiltrates.
- Assuming a short ten-foot hose delivers the full per-hundred-foot rate, and under-watering the bed by a factor of several.
When to Use This (and When Not To)
Use it to set a watering schedule for an established soaker line over a known bed area. For designing how many emitters a drip zone can support or sizing mainline, use the drip-irrigation planner, and for overhead spray use the sprinkler run-time calculator. If you do not yet know how much water is coming out of the tap at all, run the bucket-test flow calculator first, then bring the real pressure into the can test that backs up these minutes.
Soaker Hose Run Time Calculator: Frequently Asked Questions
How long should I run a soaker hose?
Long enough to apply about one inch of water, which for a standard soaker over a typical raised bed is roughly half an hour. The exact figure depends on your bed area and the hose's real output, so do a can test and confirm rather than trusting the catalog rating.
How many gallons does a soaker hose use?
Roughly twenty to sixty gallons per hour depending on type — a slow drip line near twenty, a standard porous hose near forty, and a heavy weeper up to sixty. All are per hundred feet at good pressure, so a shorter hose uses proportionally less.
Is one inch of water a week the right target?
For most vegetables and established beds, yes — about an inch a week sinking to root depth is the standard. Hot, windy or sandy conditions push it higher, while heavy clay that holds water often needs the same volume split into more frequent, shorter soaks.
Should I run a soaker on high pressure?
No. Soakers work best at low pressure so water seeps evenly along the whole line. High pressure blasts out of the first few feet, starves the far end, and wastes the water you were trying to deliver slowly to the roots.
Why does the far end of my soaker stay dry?
Because pressure drops along a long hose, so the tail barely weeps. Keep runs shorter, split into two feed lines from the middle, or accept a longer run time and verify coverage with a can test placed out at the far end.
Do I need to bury the soaker hose?
You do not have to, but covering it with mulch or a light layer of soil pays off. The cover cuts evaporation loss, shields the hose from sun, and moves the water straight down into the root zone instead of pooling on the surface where it only dries out.
Sources & Further Reading
- Watering Schedules and Soaker Hose Irrigation — University of California Statewide Integrated Pest Management
- Soaker Hose and Drip Watering for Home Gardens — Iowa State University Extension
- Irrigation Efficiency and Application Rates — Utah State University Extension
Chlorova Gardening Team
Builds, checks and documents every tool we publish
Chlorova editorial review
Checked against extension-service publications
Formula verified against published references · Updated
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