What is the size of the sun's diameter in km? Astronomy Our Solar System The Sun 1 Answer chandramohanPanakkal Feb 12, 2016 Equatorial diameter 1392530 kilometers. Answer link Related questions How does the sun affect our tides? What made the sun? Where did the materials come from? What is the winter solstice? What will our sun become at the end of its life cycle? What is the circumference of the sun? What is the circumference of the Earth's orbit around the Sun? How do you measure the circumference of the earth using sun angles? Does the sun circle around the earth? What is the radius of sun and earth? If the radius of the Earth's orbit around the Sun is 150 million km, what is the speed of the Earth? See all questions in The Sun Impact of this question 6626 views around the world You can reuse this answer Creative Commons License