Siphon Flow Rate Calculator
Flow through a siphon hose from elevation drop, hose bore and length (with friction).
The siphon crest must stay under ~8 m above the source (vapour pressure limit) and the hose must run full โ air pockets kill the flow.
Formula
Note: Assumes f โ 0.025 smooth-hose turbulent friction; rough or kinked hoses flow less.
Siphon Flow Rate Calculator is a free siphon flow rate for process, mechanical and water engineers โ 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 Siphon Flow Rate Calculator
Flow through a siphon hose from elevation drop, hose bore and length (with friction). The calculation implements V = โ( 2gฮz / (1 + fยทL/D) ) (รengel & Cimbala, Fluid Mechanics โ Bernoulli with losses). The siphon crest must stay under ~8 m above the source (vapour pressure limit) and the hose must run full โ air pockets kill the flow.
How to use Siphon Flow Rate Calculator
- 1Enter Height drop (surface โ outlet) in m.
- 2Enter Hose inner diameter in mm.
- 3Enter Hose length in m.
- 4Read Flow rate, Velocity instantly โ no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Siphon Flow Rate Calculator?
- โImplements the standard formula โ V = โ( 2gฮz / (1 + fยทL/D) )
- โReference cited on-page: รengel & Cimbala, Fluid Mechanics โ Bernoulli with losses
- โOne-click SI โ Imperial toggle โ values convert in place, physics stays in SI
- โLive worked example: the substitution recomputes from your numbers
- โRuns entirely in your browser โ nothing uploaded, free forever
Frequently asked questions
What formula does the Siphon Flow Rate Calculator use?+
It computes V = โ( 2gฮz / (1 + fยทL/D) ), per รengel & Cimbala, Fluid Mechanics โ Bernoulli with losses. 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?+
The siphon crest must stay under ~8 m above the source (vapour pressure limit) and the hose must run full โ air pockets kill the flow. Note: Assumes f โ 0.025 smooth-hose turbulent friction; rough or kinked hoses flow less.
Does this work for any fluid?+
Yes โ density and viscosity are inputs (with common fluids suggested in the field hints), so the same physics applies to water, oils, gases and process fluids. Compute always runs in SI internally, so unit mix-ups can't corrupt the result.
Is the Siphon Flow Rate Calculator free to use?+
Yes โ 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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