The NTIA Electromagnetic Field Strength Unit Converter is a spreadsheet developed from Frank Sander's technical memorandum "Derivations of Relationships Among Field Strength, Power in Transmitter-Receiver Circuits and Radiation Hazard Limits" (NTIA Technical Memorandum TM-10-469, U.S. Dept. of Commerce, June 2010).
To download the software, read through the disclaimer below and click the download link at the end. Note that by downloading the spreadsheet, you acknowledge that you have read and understood the disclaimer.
Disclaimer: The commercial software program Microsoft Excel® was used to create this spreadsheet for the convenience of the author; such use does not imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the software used is necessarily the best available for the particular application or uses.
This spreadsheet contains formulae developed by NTIA. NTIA does not make any warranty of any kind, express, implied or statutory, including, without limitation, the implied warranty of merchantability, fitness for a particular purpose, non-infringement and data accuracy. NTIA does not warrant or make any representations regarding the use of the spreadsheet or the results thereof, including but not limited to the correctness, accuracy, reliability or usefulness of the spreadsheet or the results. You can use, copy, modify, and redistribute the NTIA-developed spreadsheet upon your acceptance of these terms and conditions and upon your express agreement to provide appropriate acknowledgments of NTIA's ownership of and development of the spreadsheet by keeping this exact text present in any copied or derivative works.