Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Fluid Mechanics
Weir Flow Discharge Calculator
Estimate volumetric flow rate (discharge) over a weir structure given its width, head height, and discharge coefficient. Used by hydraulic engineers designing spillways, irrigation channels, and stormwater outlets.
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
| Weir Flow Discharge 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 | Estimate volumetric flow rate (discharge) over a weir structure given its width, head height, and discharge coefficient. Used by hydraulic engineers designing spillways, irrigation channels, and stormwater outlets. | 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. |