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Both calculators run independently — change the inputs on either side to compare results.
Fluid Mechanics
Orifice Flow Rate Calculator
Compute the volumetric flow rate of a liquid discharging through a circular orifice under a given hydraulic head. Ideal for hydraulic engineers sizing outlet structures, tanks, and culverts.
Fill in the required fields to see your result.
Fluid Mechanics
Open Channel Flow Calculator
Compute flow rate and velocity in open channels — rivers, ditches, and culverts — using Manning's equation. Use it for drainage design, irrigation channel sizing, and flood capacity analysis.
Fill in the required fields to see your result.
Key differences
| Orifice Flow Rate Calculator | Open Channel Flow Calculator | |
|---|---|---|
| Category | Fluid Mechanics | Fluid Mechanics |
| Inputs required | 3 | 5 |
| Result | Flow Rate (m³/s) | Flow Rate (m³/s) |
| What it does | Compute the volumetric flow rate of a liquid discharging through a circular orifice under a given hydraulic head. Ideal for hydraulic engineers sizing outlet structures, tanks, and culverts. | Compute flow rate and velocity in open channels — rivers, ditches, and culverts — using Manning's equation. Use it for drainage design, irrigation channel sizing, and flood capacity analysis. |