Spray Nozzle Flow Calculator (K-factor)
Flow from any K-factor nozzle (sprinkler, spray, wash-down) at a given pressure.
K-factor bakes the orifice size and discharge coefficient into one number. A K80 sprinkler at 1.5 bar flows 98 L/min — the hydraulic-calc starting point.
Formula
Spray Nozzle Flow Calculator (K-factor) is a free k factor nozzle for process, mechanical and water engineers — 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 Spray Nozzle Flow Calculator (K-factor)
Flow from any K-factor nozzle (sprinkler, spray, wash-down) at a given pressure. The calculation implements Q = K·√P (EN 12259-1 / NFPA 13 — sprinkler K-factors). K-factor bakes the orifice size and discharge coefficient into one number. A K80 sprinkler at 1.5 bar flows 98 L/min — the hydraulic-calc starting point.
How to use Spray Nozzle Flow Calculator (K-factor)
- 1Enter Nozzle K-factor in L/min·bar^0.5 (Standard sprinkler K80 (K5.6 US)).
- 2Enter Pressure at nozzle in bar.
- 3Read Flow rate instantly — no submit button needed.
- 4Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Spray Nozzle Flow Calculator (K-factor)?
- ✓Implements the standard formula — Q = K·√P
- ✓Reference cited on-page: EN 12259-1 / NFPA 13 — sprinkler K-factors
- ✓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 Spray Nozzle Flow Calculator (K-factor) use?+
It computes Q = K·√P, per EN 12259-1 / NFPA 13 — sprinkler K-factors. 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?+
K-factor bakes the orifice size and discharge coefficient into one number. A K80 sprinkler at 1.5 bar flows 98 L/min — the hydraulic-calc starting point.
Does this work for any fluid?+
Yes — 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 Spray Nozzle Flow Calculator (K-factor) 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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