Well Specific Capacity Calculator
Specific capacity (flow per metre of drawdown) — the health metric of any production well.
Track SC yearly: a 20%+ decline signals screen incrustation or aquifer depletion. Set the pump intake well below the worst expected pumping level.
Formula
Well Specific Capacity Calculator is a free specific capacity well for pump engineers, plumbers and plant designers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Well Specific Capacity Calculator
Specific capacity (flow per metre of drawdown) — the health metric of any production well. The calculation implements SC = Q / (PWL − SWL) (Driscoll, Groundwater and Wells). Track SC yearly: a 20%+ decline signals screen incrustation or aquifer depletion. Set the pump intake well below the worst expected pumping level.
How to use Well Specific Capacity Calculator
- 1Enter Stabilised pumping rate in L/s.
- 2Enter Static water level in m.
- 3Enter Pumping water level in m.
- 4Read Drawdown, Specific capacity instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Well Specific Capacity Calculator?
- ✓Implements the standard formula — SC = Q / (PWL − SWL)
- ✓Reference cited on-page: Driscoll, Groundwater and Wells
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Well Specific Capacity Calculator use?+
It computes SC = Q / (PWL − SWL), per Driscoll, Groundwater and Wells. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Track SC yearly: a 20%+ decline signals screen incrustation or aquifer depletion. Set the pump intake well below the worst expected pumping level.
Can I use this for pump selection?+
Use it to establish the duty (flow, head, NPSH, power) and then pick a pump whose curve passes through that point near best efficiency. The tool gives you the engineering numbers a supplier will ask for.
Is the Well Specific Capacity Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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