Chézy Velocity Calculator
Open-channel velocity by the Chézy formula with Bazin or direct C.
Chézy (1769) predates Manning; the two agree when C = R^1/6/n. Old irrigation departments and many Indian textbooks still spec C directly.
Formula
Chézy Velocity Calculator is a free chezy formula 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 Chézy Velocity Calculator
Open-channel velocity by the Chézy formula with Bazin or direct C. The calculation implements V = C·√(R·S) (Chow, Open-Channel Hydraulics, ch. 5). Chézy (1769) predates Manning; the two agree when C = R^1/6/n. Old irrigation departments and many Indian textbooks still spec C directly.
How to use Chézy Velocity Calculator
- 1Enter Chézy C in m^½/s (Smooth concrete 60–70; earth 35–45).
- 2Enter Hydraulic radius R in m.
- 3Enter Slope.
- 4Read Velocity instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Chézy Velocity Calculator?
- ✓Implements the standard formula — V = C·√(R·S)
- ✓Reference cited on-page: Chow, Open-Channel Hydraulics, ch. 5
- ✓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 Chézy Velocity Calculator use?+
It computes V = C·√(R·S), per Chow, Open-Channel Hydraulics, ch. 5. 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?+
Chézy (1769) predates Manning; the two agree when C = R^1/6/n. Old irrigation departments and many Indian textbooks still spec C directly.
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 Chézy 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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