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Flexible Pavement Design Calculator

Calculate the required asphalt pavement layer thickness based on traffic loading (ESALs), subgrade strength (CBR), design reliability, and climate zone using the AASHTO flexible pavement method. Used by highway and airport pavement engineers.

Design ESAL (millions) (million)

Subgrade CBR (%)

Design Reliability

Climate Zone

Terminal Serviceability Index

Fill in the required fields to see your result.

Civil

Water Supply Pipe Sizing Calculator

Determine the minimum pipe diameter needed to deliver a required flow rate under specified pressure and elevation conditions. Used by hydraulic engineers designing water mains, irrigation systems, and building reticulation.

Required Flow Rate (L/s)

Pipe Length (m)

Elevation Difference (m)

Minimum Pressure Required (kPa)

Pipe Material

Fill in the required fields to see your result.

Key differences

	Flexible Pavement Design Calculator	Water Supply Pipe Sizing Calculator
Category	Civil	Civil
Inputs required	5	5
Result	Total Pavement Thickness (mm)	Required Pipe Diameter (mm)
What it does	Calculate the required asphalt pavement layer thickness based on traffic loading (ESALs), subgrade strength (CBR), design reliability, and climate zone using the AASHTO flexible pavement method. Used by highway and airport pavement engineers.	Determine the minimum pipe diameter needed to deliver a required flow rate under specified pressure and elevation conditions. Used by hydraulic engineers designing water mains, irrigation systems, and building reticulation.