https://www.pcblibraries.com/Forum/ipc7351-smd-pth-reference-calculators_topic785.html https://www.jlab.org/accel/eecad/pdf/022pulliam.pdf https://electronics.stackexchange.com/questions/244475/ipc-specification-for-pad-width-vs-pin-width-smd IPC-7351 There is an electronic one in www.IPC.org Just search for "pad calculator" from their home page. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Ahmad, Syed Sent: Thursday, August 23, 2018 1:26 PM To: [log in to unmask] Subject: [TN] SMT related calculator site Is there a site that has calculators for solder/SMT related calculations? Syed Sajid Ahmad, Research Staff, ECE, NDSU Cell 701-200-1674