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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
Pipe Flow Velocity Calculator
Find the average velocity of fluid flowing inside a circular pipe from the volumetric flow rate and pipe diameter. Essential for checking whether flow falls within recommended velocity limits to avoid erosion or excessive head loss.
Fill in the required fields to see your result.
Key differences
| Orifice Flow Rate Calculator | Pipe Flow Velocity Calculator | |
|---|---|---|
| Category | Fluid Mechanics | Fluid Mechanics |
| Inputs required | 3 | 2 |
| Result | Flow Rate (m³/s) | Flow Velocity (m/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. | Find the average velocity of fluid flowing inside a circular pipe from the volumetric flow rate and pipe diameter. Essential for checking whether flow falls within recommended velocity limits to avoid erosion or excessive head loss. |