WaterCalcLabDrip Irrigation Calculator
Calculate nominal zone flow and delivered volume from emitter count, measured emitter flow and runtime.
Your result
Bars compare only results in the same unit group. They are normalized, not a time-series forecast.
Planning result based on your inputs.
How this tool works
Calculate nominal zone flow and delivered volume from emitter count, measured emitter flow and runtime.
Q = N × q; V = Q × timeExample calculation
The prefilled form is a worked example. Its base-unit inputs and expected outputs are shown below; use the reset button to restore it.
| Input | Example |
|---|---|
| Emitter count | 40 |
| Flow per emitter | 0.033333333333333 |
| Runtime | 60 |
| System efficiency (separate losses) | 0.9 |
Frequently asked questions
How should I choose the inputs?
Use measurements and local records for the stated period. All preset values are illustrative examples, not recommendations.
What does this result leave out?
Pressure variation, clogging and unequal distribution affect actual flow. The retained fraction is a user assumption; plant needs are not inferred.
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Method version 1.0 · Last reviewed: 2026-10-10