Well Water Yield Calculator
Calculate daily water availability from your well. Determine if your well can sustain your household usage and if storage is needed.
Inputs
ft
ft
GPM
GPM
gal/day
Results
Daily Yield
4,320 gal
Surplus/Deficit
4,020 gal/day
Storage Buffer Needed0 gal
Pump Run Time1 hrs/day
Sustainable Rate3 GPM
Water Column Feet$150
How to Use This Calculator
- Enter Well Depth (ft) and Static Water Level (ft below surface) from your well driller's report or well tag.
- Input Pump Rate (GPM) from the pump nameplate and Recovery Rate (GPM) from your well yield test.
- Set Daily Usage (gallons) based on household consumption (80–100 gal/person/day plus livestock and irrigation).
- Review Daily Yield (gal) — if less than Daily Usage, you need a storage buffer or demand reduction.
- Check Storage Buffer Needed (gal) to size a holding tank that bridges the pump recovery gap during peak demand.
- Use Sustainable Rate (GPM) and Surplus/Deficit (gal/day) to decide whether the well is adequate or requires deepening.
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