Earth is estimated to be 4.54 billion years old, plus or minus about 50 million years. Scientists have scoured the Earth searching for the oldest rocks to radiometrically date. In northwestern Canada, they discovered rocks about 4.03 billion years old.
How old is the earth today?
4.543 billion years Earth/Age
What was used to accurately date the Earth?
The best estimate for Earths age is based on radiometric dating of fragments from the Canyon Diablo iron meteorite. From the fragments, scientists calculated the relative abundances of elements that formed as radioactive uranium decayed over billions of years.
What is the date of earth born?
October 23, 4004 B.C.: Happy Birthday Earth! - Scientific American Blog Network.