Two kinds of software tools for conversion between raw FEV1 and percentiles of FEV1 among patients with cystic fibrosis are available for download from this page:
Both also handle CF height percentiles.
Neither height nor FEV1 equations have been implemented in Excel or SAS as yet.
These programs are free software; you can redistribute them and/or modify them under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
These programs are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
This is the program that works behind the web conversion tool. It converts FEV1 and height into percentiles and vice versa, for a single patient at a time.
This is a collection of functions written in R, which convert FEV1 and height into percentiles and vice versa for a whole data set. It requires an installation of R on your computer (available for download here). Datasets can be exported from almost any other software in the comma separated format, imported into R to calculate the percentiles and exported again through the same format.