PRACTICAL GARDENING RESEARCH What to grow. What to buy. How to choose.
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The garden workbench

Drip water-delivery calculator

Calculate rated flow and theoretical runtime for a water target.

Water units

Read the actual emitter label. Flow per 100 feet of tubing is not flow per emitter. The water target is your choice; we do not prescribe a universal watering schedule.

Choose your water target.

Enter a delivery volume to estimate runtime. Check soil moisture and actual emitter output when using your system.

Formula and compatibility checklist

Emitter count × flow per emitter = total flow per hour. Target volume ÷ total flow × 60 = minutes. Manufacturer flow ratings assume appropriate operating conditions.

Confirm backflow protection, filter, regulator, fitting dimensions, maximum run length and water supply before purchasing components.

Utah State University Extension: backyard drip irrigation

Put your plan into practice

Use these guides to check the growing decisions behind your inputs.

Check drip tubing, flow and pressure compatibility →