Pumps in Series Calculator
Combined head of identical pumps in series at a common flow.
Series = heads add at the same flow. Check the LAST pump's casing rating — it sees suction pressure plus all upstream heads.
Formula
Pumps in Series Calculator is a free pumps in series 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 Pumps in Series Calculator
Combined head of identical pumps in series at a common flow. The calculation implements H_total = n × H_each (at equal Q) (Karassik, Pump Handbook — series/parallel operation). Series = heads add at the same flow. Check the LAST pump's casing rating — it sees suction pressure plus all upstream heads.
How to use Pumps in Series Calculator
- 1Enter Pumps in series.
- 2Enter Head per pump at this flow in m.
- 3Enter Flow (same through all) in m³/h.
- 4Read Combined head, Discharge pressure (water) instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Pumps in Series Calculator?
- ✓Implements the standard formula — H_total = n × H_each (at equal Q)
- ✓Reference cited on-page: Karassik, Pump Handbook — series/parallel operation
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Pumps in Series Calculator use?+
It computes H_total = n × H_each (at equal Q), per Karassik, Pump Handbook — series/parallel operation. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Series = heads add at the same flow. Check the LAST pump's casing rating — it sees suction pressure plus all upstream heads.
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 Pumps in Series 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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