Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Fluid Mechanics
Orifice Flow Discharge Calculator
Calculates the volumetric flow rate through an orifice plate or opening given the upstream-to-downstream pressure difference. Used in flow metering, tank drainage design, and hydraulic control systems.
Fill in the required fields to see your result.
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.
Key differences
| Orifice Flow Discharge Calculator | Weir Flow Discharge Calculator | |
|---|---|---|
| Category | Fluid Mechanics | Fluid Mechanics |
| Inputs required | 4 | 3 |
| Result | Flow Rate (m³/s) | Flow Rate (m³/s) |
| What it does | Calculates the volumetric flow rate through an orifice plate or opening given the upstream-to-downstream pressure difference. Used in flow metering, tank drainage design, and hydraulic control systems. | 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. |