Design efficient drip lines with smart garden inputs. Adjust rows, loops, fittings, and waste percent. Download a summary, share plans, and irrigate confidently now.
| # | Layout | Bed (L × W) | Row spacing | Lead mode | Waste | Estimated dripline | Estimated rolls |
|---|---|---|---|---|---|---|---|
| 1 | Parallel rows | 6.0 × 1.2 m | 0.30 m | Once | 8% | ~30–36 m | 2 rolls (30 m) |
| 2 | Serpentine | 4.0 × 1.0 m | 0.25 m | Once | 10% | ~20–26 m | 1 roll (30 m) |
| 3 | Perimeter loop | 3.0 × 2.0 m | — | Per bed | 12% | ~18–24 m | 1 roll (30 m) |
Parallel rows suit rectangular beds and make troubleshooting easier, but they add end turns on every run. A serpentine weave reduces separate end connections by keeping one continuous path, yet it needs cross-overs between runs. Perimeter loops work well for shrubs or borders, providing even edge wetting with fewer passes.
The calculator estimates runs from usable width: bed width minus two edge margins. Typical row spacing ranges from 0.25–0.40 m (10–16 in) for vegetables and tighter plantings, while wider spacing fits larger perennials. Edge margins of 0.05–0.15 m help keep tubing off paths and reduce damage from tools.
Turn allowance covers bends, connectors, and slack at the end of each run. Many installs use 0.10–0.20 m per turn, depending on fitting style and how tightly you route the line. The fittings allowance adds a small extra length per tee, elbow, coupler, or valve so you do not underbuy after cutting and inserting barbs.
A practical waste factor is 5–15%. Use the lower end for simple, straight runs and the higher end for complex beds or first-time builds. The roll count is calculated by dividing total length (with waste) by your roll length, such as 30 m or 100 ft. Buying one additional roll can prevent delays when you expand later.
Estimated emitters come from total length divided by emitter spacing, then total flow equals emitters times emitter flow (L/h). Common inline emitters are 1–4 L/h, and spacing often matches plant distance. If total flow is high, split beds into zones to keep pressure balanced and distribution uniform.
Choose parallel rows for easy isolation and maintenance. Choose serpentine if you want one continuous line and fewer separate end connections. Compare totals in the calculator and pick the layout that fits your routing.
Many beds use 0.25–0.40 m spacing depending on crop density and soil texture. Sandy soils may benefit from closer spacing, while heavier soils can often use wider spacing. Adjust based on wetting pattern.
Use 5–10% for straight layouts with few fittings. Use 10–15% when you have many turns, obstacles, or uncertain routing. Extra tubing is useful for repairs, future expansions, and replacing damaged sections.
Turn allowance covers slack at the end of runs and the extra length needed to bend cleanly without kinking. Fittings allowance covers cut-and-insert losses per fitting. Using both reduces the chance of underestimating.
The calculator multiplies estimated emitters by emitter flow rate to give total L/h. Compare that value to your water source capacity and regulator limits. If the value is too high, split the design into zones.
No. It estimates tubing length, roll count, emitters, and total flow. For long runs, slopes, or small-diameter tubing, pressure loss can affect uniformity. Use manufacturer charts and consider shorter zones for stability.
Tip: For long runs, confirm pressure loss and split into zones.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.