Try http://www.ultracad.com/calc.htm and download "wiregage.exe". Lots of other good calculators on this site. I have a brute-force formula too if you're interested, but the Ultra-Cad calculator is much handier. Roger M. Stoops, C.I.D., PCB Designer [log in to unmask] Trimble Engineering and Construction Division 5475 Kellenburger Rd. Dayton, OH 45424-1099 USA Ph: +01 937.233.8921 or +01 937.233.4574 ext 288 Fax: +01 937.233.7511 Gaetan Fournier To: [log in to unmask] <FournierG@KA cc: NTECH.COM> Subject: [TN] Trace resistance Sent by: TechNet <[log in to unmask] ORG> 12/13/01 12:26 PM Please respond to "TechNet E-Mail Forum." Does anybody knows a good link or freeware for DC resistive calculation in function with the thickness, width and length of a PCB track. I already know about "trace with calculator" http://www.aracnet.com/cgi-usr/gpatrick/trace.pl but this is not exactly what I'm looking for, current and temperature rises aren't the issues for my application. It's more a question of DC equivalent resistive for a coil made with a long PCB trace. Thanks GF --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 --------------------------------------------------------------------------------- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------