Presenting numbers in surd form is quite common in science and engineering especially where a calculator is either not allowed or unavailable, and the calculations to be undertaken involve irrational values. The objective of Peter Chew Quadratic Surd Diagram is to provide complete information for the knowledge of Quadratic Surd. Peter Chew Quadratic Surd Diagram lets us know the final answer after convert any Quadratic Surd, either the sum or difference of two real numbers or the sum or difference of two complex or complex numbers. Application of Peter Chew Quadratic Surd Diagram and Peter Chew Theorem in Peter Chew Quadratic Surd Diagram (PCQSD) calculator allows PCQSD calculator to convert all Quadratic Surd, including decimal value Quadratic Surd to sum or difference of two real numbers or sum or sum of two real numbers Complex numbers that cannot be converted by current online calculators, such as Wolfram Alfa, Symbolab, Mathphoto, and Geogebra [Calculation on 2-9-2022]. Peter Chew Quadratic Surd Diagram (PCQSD) Calculator can help convert all Quadratic Surd will effectively help math teaching and learning especially when similar COVID-19 problems arise in the future. Peter Chew Theorem and Application(preprint) is share at World Health Organization(WHO,  ID: ppcovidwho-308371).because objective Peter Chew Theorem is to help the  teaching  of  mathematics, especially when  similar  covid-19 problems arise in the  future. Author i) Program Chairs for The 11th International Conference on Engineering Mathematics and Physics in Saint-Etienne, France on July 7-9, 2022 . http://www.icemp.org/committee.html ii)Keynote Speaker [AI age Calculator, PCET Calculator] of the 8th International Conference on Computer Engineering and Mathematical sciences (ICCEMS 2019). https://www.iccems.com/2019/WB/v1/index.html@id=0.html. iii) Keynote Speaker [AI age Calculator, PCET Calculator] of the International Conference on Applications of Physics , Chemistry & Engineering Sciences, ICPCE 2020. , in University Malaya, Malaysia. https://www.facebook.com/imrf.in/photos/a.354300178063577/1433507146809536/?type=3&theater. For anyone who buys this book ,e.g. from lulu.com ( https://www.lulu.com/shop ) if you send proof of purchase to [email protected], you can get free AI Age Calculator, Peter Chew Quadratic Surd Diagram Calculator App.