You can quickly calculate losses for multiple fittings in a single sheet.

The database contains loss coefficients ($C$-values) for hundreds of specific fittings—from round elbows to rectangular transitions, fire dampers, and junctions. The core formula it relies on is:

Here are a few options for the post, depending on where you intend to post it (e.g., LinkedIn, a blog, or a forum).

is the total pressure loss (in inches of water column or Pascals) Ctcap C sub t is the non-dimensional total pressure loss coefficient Pvcap P sub v is the velocity pressure, defined as (in IP units) or (in SI units) The provides empirical Ctcap C sub t