What gives the oldest radiometric age date?

Measuring the uranium-to-lead ratios in the oldest rocks on Earth gave scientists an estimated age of the planet of 4.6 billion years. Segment from A Science Odyssey: Origins. Radiometric Dating: Geologists have calculated the age of Earth at 4.6 billion years.

How old is radiometric dating?

4.5 billion years ago Radiometric dating, which relies on the predictable decay of radioactive isotopes of carbon, uranium, potassium, and other elements, provides accurate age estimates for events back to the formation of Earth more than 4.5 billion years ago.