Measure leak waste for irrigation lines without guesswork. Track daily losses and costs by scenario. Stop unnoticed leaks and protect your plants today.
These examples show how leak size, pressure, and runtime change waste.
| Scenario | Pressure | Hole (mm) | Leaks | Hours/day | Days |
|---|---|---|---|---|---|
| Drip line pinhole | 1.5 bar | 1.0 | 2 | 1.5 | 30 |
| Micro-tube split | 2.0 bar | 2.0 | 1 | 2.0 | 30 |
| Spray riser crack | 35 psi | 3.0 | 1 | 0.75 | 7 |
When you choose pressure and hole size, the calculator treats the leak like a small orifice.
Where Q is flow, Cd is discharge coefficient, d is hole diameter, g is gravity, h is pressure head, and ρ is water density.
For energy estimation (optional), pressure-based method uses hydraulic power P = Δp × Q and scales by pump efficiency.
Irrigation systems often run unattended, so a pinhole or cracked riser can discharge for weeks. Even moderate pressure pushes steady flow through small openings, turning invisible seepage into measurable daily loss. Tracking leak flow, runtime, and number of leak points helps prioritize repairs and prevents overwatering that can stress roots and invite disease.
Pressure and opening diameter drive the flow estimate. Runtime defines how long the leak is active, and leak count scales totals. For cost, the most reliable parameter is your billed water price. If you pump from a tank or bore, adding energy helps reveal the full operating impact rather than just water consumption.
When possible, use known-flow mode by catching discharge in a container and timing it. For example, if one leak fills a 5‑liter bucket in 2 minutes, that equals 2.5 L/min per leak. Use this method for irregular cracks, fittings, or split micro‑tubes where geometry is uncertain.
Example: pressure 2.0 bar, hole 2.0 mm, 1 leak, runtime 2 hours/day, period 30 days, water price 0.90 per m³. The calculator estimates total flow, then converts to liters per day and liters per period. Multiply period volume by your tariff to estimate avoidable cost. If energy is included, the tool adds kWh and energy cost for the same period.
Compare scenarios: one large leak versus multiple small leaks, or shorter runtime after timer adjustments. If the daily loss is high, treat it as a priority repair and confirm pressure regulation, filter condition, and emitter integrity. Recalculate after fixes to document savings and keep irrigation performance consistent across seasons.
Use known-flow when you can measure the discharge with a container and timer. Use pressure mode for quick estimates when leak size is roughly known and pressure is reasonably stable.
A value around 0.60–0.65 is common for sharp-edged openings. If the leak is a smooth nozzle-like opening, Cd may be higher. When unsure, use 0.62 and validate using a measured-flow check.
Flow depends on opening area, and area grows with the square of diameter. Doubling diameter increases area roughly four times, which can multiply water loss quickly.
Use the daily period when the line is pressurized, not just scheduled watering. Include manual watering, maintenance flushes, or any automatic cycles. If pressure stays on between cycles, include that time.
Include energy when you use an electric pump and want a fuller operating cost. If water is gravity-fed or supplied without a pump under your control, energy may be negligible or outside your cost scope.
Yes. Enter the relevant pressure, leak size, and runtime. For higher-pressure spray systems, verify pressure units and consider measuring a representative leak flow for best accuracy.
Add pressure regulation, filter maintenance, and routine line inspections. Protect tubing from UV and abrasion, secure fittings, and winterize where freezing occurs. A short monthly audit often prevents large losses.
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.