Water & irrigation.
Measured clearly.
Water-volume, runtime, drip-flow and rain-catchment calculators for efficient irrigation.
Turn a physical garden into checkable quantities.
Watering advice becomes useful when depth, area and flow are connected. These calculators convert those measurements into gallons and minutes so rainfall can be subtracted and systems can be scheduled from observed output.
Choose a calculator
4 focused tools
Garden water
Convert inches of weekly water over a garden area into gallons.
Sprinkler runtime
Calculate sprinkler runtime from target water depth and measured application rate.
Drip irrigation
Estimate drip-zone flow and total gallons from emitters, flow rate and runtime.
Rainwater harvest
Estimate gallons captured from roof area, rainfall and system efficiency.
A practical sequence
- Measure the irrigated area or emitter count.
- Test the real application or emitter rate.
- Set a target that reflects crop, soil and weather.
- Watch for runoff and adjust frequency.
Common planning mistakes
- Scheduling only by minutes without measuring output.
- Ignoring useful rainfall.
- Assuming every emitter has equal pressure.
- Applying water faster than soil can absorb it.
Water & irrigation FAQ
How much water is one inch over a garden?
One inch over one square foot is about 0.623 gallons, so 100 square feet requires about 62.3 gallons.
Should irrigation run every day?
Not automatically. Frequency depends on rooting depth, soil, crop stage and weather; measure moisture rather than relying only on a timer.