> For the complete documentation index, see [llms.txt](https://dante-solutions-inc.gitbook.io/dante-6.3-help-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dante-solutions-inc.gitbook.io/dante-6.3-help-documentation/introduction-2/htc-fit.md).

# HTC Fit

<figure><img src="https://3062023715-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0UQEr9tolIKQwZXdPc9a%2Fuploads%2Ft27DlGETYHPkGUb6Ib2X%2FHTCFit_256.png?alt=media&amp;token=0dc529f6-18d1-4a63-8d51-8051c2c6163d" alt=""><figcaption></figcaption></figure>

The HTC Fit utility is used to fit the heat transfer coefficients. The heat transfer coefficients are the boundary conditions used to define the heat transfer for a specific piece of equipment. The HTC's can be fit as a constant, a function of part surface temperature, or as a function of time in the case of gas quenching. To use the HTC Fit utility, the user would need to provide experimental data, a .DAN file to define the geometry and part surface, then use the utility to generate an input file.