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Pipe Flow Calculator (Hazen-Williams)

Determine water flow rate and velocity in pressurized pipes using the Hazen-Williams empirical equation. Ideal for civil engineers sizing water mains, irrigation lines, or fire-suppression systems.

Pipe Diameter (mm)

Pipe Length (m)

Head Loss (m)

Hazen-Williams Coefficient

Fill in the required fields to see your result.

Civil

Pavement Thickness Design Calculator

Estimate the required pavement thickness for roads or parking lots based on traffic volume, subgrade strength, and design life. Essential during roadway design to prevent premature structural failure.

Daily Traffic (ADT) (vehicles/day)

Design Life (years)

Subgrade CBR (%)

Pavement Type

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Key differences

	Pipe Flow Calculator (Hazen-Williams)	Pavement Thickness Design Calculator
Category	Civil	Civil
Inputs required	4	4
Result	Flow Rate (L/s)	Required Thickness (inches)
What it does	Determine water flow rate and velocity in pressurized pipes using the Hazen-Williams empirical equation. Ideal for civil engineers sizing water mains, irrigation lines, or fire-suppression systems.	Estimate the required pavement thickness for roads or parking lots based on traffic volume, subgrade strength, and design life. Essential during roadway design to prevent premature structural failure.