All of those websites are wrong, and I say this from first-hand experience.
Don’t try to convert your GPA. Unless a college wants you to convert, and few do, just use the 100 point scale.
Additionally, be aware that grading is often stricter at non-US schools, and every AO knows this. Whether or not you get admitted to your choices is another question. Grades are important, but they are just one part of the application. But each of those schools is extremely hard to get into for international students. Good luck.