http://www.arrl.org/rf-exposure-calculator
https://www.arrl.org/rf-exposure-calc-instructions
From the Technical Coordinator -- New FCC exposure requirements
Calculators
http://hintlink.com/power_density.htm
http://www.lakewashingtonhamclub.org/resources/rf-exposure-calculator/
https://hamradioschool.com/wp-content/uploads/2016/03/RF-Exposure-Calculator.xlsx
https://www.qsl.net/co8tw/Coax_Calculator.htm
Additional Information
http://www.arrl.org/rf-exposure
http://www.arrl.org/files/file/Technology/RFsafetyCommittee/RF+Exposure+and+You.pdf
https://transition.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65b.pdf
https://www.fcc.gov/sites/default/files/lms-radiofrequency-exposure-compliance-worksheets-radio-broadcast-stations.pdf
https://www.youtube.com/watch?v=h13h6RpJ2Yo
https://www.youtube.com/watch?v=7dSieKF3rm0