Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Civil
Culvert Sizing Calculator
Calculate the required culvert diameter to safely pass design stormwater flows under roads, driveways, or embankments. Helps engineers and contractors avoid undersized culverts that cause flooding or washouts.
Fill in the required fields to see your result.
Civil
Pipe Flow Rate Calculator
Determine the flow rate of water through a pipe using the Hazen-Williams equation. Use this when designing or analyzing water distribution systems, irrigation lines, or municipal supply networks.
Fill in the required fields to see your result.
Key differences
| Culvert Sizing Calculator | Pipe Flow Rate Calculator | |
|---|---|---|
| Category | Civil | Civil |
| Inputs required | 4 | 4 |
| Result | Required Culvert Diameter (inches) | Flow Rate (gpm) |
| What it does | Calculate the required culvert diameter to safely pass design stormwater flows under roads, driveways, or embankments. Helps engineers and contractors avoid undersized culverts that cause flooding or washouts. | Determine the flow rate of water through a pipe using the Hazen-Williams equation. Use this when designing or analyzing water distribution systems, irrigation lines, or municipal supply networks. |