Dataset and scripts supporting the article "D-to-A_eff converter", a proceeding presented at the NCSLI Workshop & Symposium 2022, Grapevine TX.The dataset consists of two main parts: dimensional measurements and conversion scripts. The dataset and scripts produce an estimate for the effective area and distortion coefficient of the piston-cylinder assembly PCA2062 based on the 2020 dimensional characterization.The dimensional measurements of straightness, roundness, and two-point diameter for the piston and cylinder are in the text files: "straightnessPis.txt", "straightnessCyl.txt", "roundnessPis.txt", "roundnessCyl.txt", "radiusPis.txt", "radiusCyl.txt"The main conversion script is: "CalcAeff2062.py"This calls two other scripts to find the generatrixes of the piston and cylinder: "findGcyl2062.py" and "findGpis2062.py"The conversion also relies on finite-element calculation. These scripts are in the directory /fea. All scripts and data from the /fea directory are controlled by the main conversion script CalcAeff2062.py. To run the finite-element software will require a software license.