Pitot Tube Velocity Calculator
Fluid velocity from pitot–static differential pressure for liquids or gases.
The duct-traverse workhorse: 250 Pa (≈1 in w.g.) of velocity pressure in 20 °C air is 20.4 m/s. Always traverse — centreline velocity overstates the average.
Formula
Pitot Tube Velocity Calculator is a free pitot tube 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 Pitot Tube Velocity Calculator
Fluid velocity from pitot–static differential pressure for liquids or gases. The calculation implements V = √(2·ΔP / ρ) (ISO 3966 — velocity-area method with pitot static tubes; ASHRAE Handbook — Fundamentals, ch. 37). The duct-traverse workhorse: 250 Pa (≈1 in w.g.) of velocity pressure in 20 °C air is 20.4 m/s. Always traverse — centreline velocity overstates the average.
How to use Pitot Tube Velocity Calculator
- 1Enter Differential (dynamic) pressure in Pa.
- 2Enter Fluid density in kg/m³ (Air 20 °C = 1.204; water = 998).
- 3Read Velocity instantly — no submit button needed.
- 4Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Pitot Tube Velocity Calculator?
- ✓Implements the standard formula — V = √(2·ΔP / ρ)
- ✓Reference cited on-page: ISO 3966 — velocity-area method with pitot static tubes; ASHRAE Handbook — Fundamentals, ch. 37
- ✓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 Pitot Tube Velocity Calculator use?+
It computes V = √(2·ΔP / ρ), per ISO 3966 — velocity-area method with pitot static tubes; ASHRAE Handbook — Fundamentals, ch. 37. 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 duct-traverse workhorse: 250 Pa (≈1 in w.g.) of velocity pressure in 20 °C air is 20.4 m/s. Always traverse — centreline velocity overstates the average.
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 Pitot Tube Velocity 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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