Welcome to HCM Calculator! This site is the third-party web site to support calculation along with Highway Capacity Manual (HCM).

The HCM Calculator is to provide quick solutions for all of the calculations in HCM.

It also illustrates the simple figures for full complement of the understandings.

This site is launched in November 2022 by Rei Tamaru, a PhD student at the University of Wisconsin-Madison.

HCM 7th edition
+ See

The latest HCM (7th Edition) can be found here (National Academics).
Or you can find it on Amazon.

For the website inquires, please email to me.