Irrigation Run Time
Calculator
Results
- Run time (h)
- 11.111111
- Run time (min)
- 666.666666
Farming results
| Run time (h) | 11.111111 |
| Run time (min) | 666.666666 |
formula-map diagram
- Run time (h)
- 11.111111
- Run time (min)
- 666.666666
Formula map
Formula
Run time = water volume ÷ flow rate= 11.111111111111
Note
Simplified agronomic model: results use the rates, grades and coefficients you enter and ignore soil type, weather, variety and local regulations. Confirm with a soil test, the product label and an agronomist before applying anything.
More in Farming and crops
See all →Frequently asked questions
How is run time different from the total water volume needed?+
Volume tells you how much water the crop needs; run time tells you how long to operate the system, at a known flow rate, to deliver that volume. The two are linked, but run time also depends on your specific equipment's output.
Why does my sprinkler system need a longer run time than a drip system for the same water depth?+
Drip irrigation applies water directly to the root zone with very little loss to evaporation or wind drift, so it typically needs less run time or a lower total volume to deliver an equivalent effective depth compared to overhead sprinklers.
Does flow rate stay constant throughout an irrigation set?+
It can drop if system pressure falls — for instance, when multiple zones run simultaneously or a pump is undersized for the demand. Run-time calculations assume a stable flow rate, so a pressure check periodically keeps the estimate accurate.
How do I avoid runoff when the calculated run time is long?+
If a single continuous run would exceed your soil's infiltration rate, split the calculated run time into two or more shorter cycles with a soak period between them, known as cycle-and-soak irrigation. This lets the same total volume infiltrate without ponding or runoff.
Should I adjust run time for wind or high temperatures?+
Yes — sprinkler systems lose more water to evaporation and drift under hot, windy conditions, so run time may need to increase by 10-20% to deliver the same effective depth compared to calm, cool conditions.