MEASURE · PLAN · MAKE IT COUNT
Watering time calculator
Relate a water target, useful rain and measured flow.
Metric units as labelled. Prices, where used, are in EUR.
Method and limits
Area × max(0, target depth − useful rain) ÷ efficiency gives litres; divide by total zone flow for minutes. One mm over one m² is one litre. Zero watering is returned if rain covers the target. This is not a climate-specific watering schedule.
Worked example
With the editable starting values: 26.0417 watering minutes. 312.5 litres for the zone · 6.25 l/m² supplied at the entered efficiency
- Area (m²): 50
- Target water depth per session (mm): 5
- Useful rainfall (mm): 0
- Estimated efficiency (%): 80
- Total zone flow (l/min): 12
Frequently asked questions
Are these starting values recommendations?
No. They are editable examples. Use your own measurements and the product label or quoted specification.
What should I check before using the result?
Area × max(0, target depth − useful rain) ÷ efficiency gives litres; divide by total zone flow for minutes. One mm over one m² is one litre. Zero watering is returned if rain covers the target. This is not a climate-specific watering schedule.
Are units and prices converted automatically?
No. These tools use the metric units shown next to each field. Monetary inputs and results are in EUR; enter the relevant EUR tariff or quote. No currency conversion or live prices are applied.
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