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🏞️ Manning Equation
Full-pipe flow by Manning's formula: Q = (1/n)·A·R^⅔·S^½ (SI).
The Mixadù Manning Equation is a free online calculator that full-pipe flow by Manning's formula: Q = (1/n)·A·R^⅔·S^½ (SI). It runs entirely in your browser — no sign-up, no uploads, and your inputs never leave your device. Supported units include IN, MM, FT, M.
- Instant results as you type
- Free — no login or sign-up
- Private: runs entirely in your browser
- Part of the 91-tool Engineering Toolkit
Frequently asked questions
Is the Manning Equation free?
Yes. The Manning Equation is completely free, with no login or sign-up.
Are my inputs uploaded anywhere?
No. The Manning Equation runs entirely in your browser; your inputs never leave your device.
Which units does the Manning Equation support?
It supports IN, MM, FT, M.
Does the Manning Equation work on mobile?
Yes. It is fully responsive and works on phones and tablets.