Will My Well Keep Up With My House? Free Well Yield Calculator

Free Tool

Will my well keep up with my house?

Enter your well's flow rate and your household, and see whether your well can keep up — with a clear green, amber, or red verdict and the storage it would take to bridge a low-yield well.

Your Well & Home

Tell us your numbers

Your well's flow rate (yield) In gallons per minute (GPM), from a flow/well test or your pump invoice. Not sure? A driller's flow test is the only exact way — this gives you a feel for it.

6 GPM

Bathrooms Full bathrooms in the home — a standard way to gauge peak water demand.

People in the household Drives your daily use and your busiest-stretch demand.

Your result

Keeps up

—

Your home wants (busiest 2 hrs)~300 gal

Your well delivers in 2 hrs~720 gal

Your well still makes, per day ~8,640 gal

Your household uses, per day ~300 gal

Lender floor (FHA/HUD) clears it

Estimate only. A licensed driller's flow test is the only way to know your well's real sustained yield.

Why your real yield needs a flow test

A well that pours fast for five minutes can still run thin over a long morning. The number that decides whether your well keeps up is its sustained yield — the gallons per minute it holds over a multi-hour draw — and the only way to measure that is a flow test by a licensed driller or pump pro. Use this estimate to know what to ask. If it comes back amber or red, a pro can tell you whether a storage tank, a deeper well, or a hydrofrac is the right fix.

The Math

How this verdict works

Your busiest two hours

Showers, laundry, and dishes pile up in a morning or evening rush. We estimate that heavy 2-hour demand from your household size and bathrooms — the moment a well actually gets tested, not the daily total.

What your well delivers

Your flow rate over those two hours (GPM × 120 minutes) is what the well itself can supply. A 1 GPM well makes 1,440 gallons a day — plenty — but only 120 in a 2-hour rush, which is where low-yield wells fall short.

The verdict & the fix

We check your yield against the busy-hour need and the FHA/HUD floor (3 GPM existing, 5 GPM new build). If it's short, a storage tank sized to the gap — filled slowly, delivered by a booster — bridges it.

Sources: FHA/HUD Handbook 4000.1 (3 GPM existing / 5 GPM new-construction well yield over a 4-hour period); Penn State Extension, Using Low-Yielding Wells & Estimating Water Needs (2-hour peak method, 100 gal/person storage); University of Nebraska Extension G2149 (household peak-demand method); US EPA WaterSense (per-person daily use). Estimates for planning — a licensed driller's flow test confirms your well's real yield.

Get your well's real yield from a licensed pro

A flow test settles it — and if your well needs storage, a deeper bore, or a hydrofrac, the right pro will tell you which. Get up to 3 free quotes from licensed well & pump pros near you. Direct contact, no referral fees.

Get 3 free quotes →