Drip Irrigation Zone Calculator
Emitter count, zone flow and run time to deliver a target water depth.
1 mm over 1 m² = 1 litre exactly — the identity that makes irrigation math easy. Pressure-compensating emitters keep q_e honest on slopes.
Formula
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Drip Irrigation Zone Calculator is a free drip irrigation design for pump engineers, plumbers and plant designers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Drip Irrigation Zone Calculator
Emitter count, zone flow and run time to deliver a target water depth. The calculation implements Q_zone = n×q_e; t = area(m²)×depth(mm) / Q(L/h) (FAO Irrigation & Drainage Paper 36). 1 mm over 1 m² = 1 litre exactly — the identity that makes irrigation math easy. Pressure-compensating emitters keep q_e honest on slopes.
How to use Drip Irrigation Zone Calculator
- 1Enter Number of emitters.
- 2Enter Emitter rating in L/h.
- 3Enter Irrigated area in m².
- 4Enter Target application in mm depth.
- 5Read Zone flow, Run time for target instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Drip Irrigation Zone Calculator?
- ✓Implements the standard formula — Q_zone = n×q_e; t = area(m²)×depth(mm) / Q(L/h)
- ✓Reference cited on-page: FAO Irrigation & Drainage Paper 36
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Drip Irrigation Zone Calculator use?+
It computes Q_zone = n×q_e; t = area(m²)×depth(mm) / Q(L/h), per FAO Irrigation & Drainage Paper 36. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
1 mm over 1 m² = 1 litre exactly — the identity that makes irrigation math easy. Pressure-compensating emitters keep q_e honest on slopes.
Can I use this for pump selection?+
Use it to establish the duty (flow, head, NPSH, power) and then pick a pump whose curve passes through that point near best efficiency. The tool gives you the engineering numbers a supplier will ask for.
Is the Drip Irrigation Zone Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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