Age of Earth
The age of Earth is the time that has passed since the planet formed from the solar nebula.
How big is it?
4.54 Gyr
Time · reference interval
A little perspective
About the same scale as Earth.
Earth: Earth is the rocky planet on which we live and the third planet from the Sun.
Measurements, assumptions & sources +
Age of Earth
A rounded 4.54 billion-year geological age.
Defined examples — our methodology
The marked time is calibrated. Unmeasured illustration details are representative.
Earth
Mean-radius spherical model for Earth; actual shape is not perfectly spherical.
Defined examples — our methodology
The marked age is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 4.54 Gyr
For comparison, this page uses time. This is labelled reference interval: an explicit comparison model rather than a claim that every example has the same value.
A rounded 4.54 billion-year geological age.
The identifying illustration and the numerical comparison remain separate. How calibrated comparisons work →
Recorded properties
Age of Earth dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 4.54 Gyr | Not recorded | reference interval |
Around this scale
Go smaller. Go bigger.
These links use compatible time records, ordered around the selected value.
Nearest lower value · TimeSince the non-avian dinosaurs66 MyrThe interval since the non-avian dinosaurs marks the time since these dinosaurs disappeared from Earth.
Around the same scale · SpaceEarth4.54 GyrEarth is the rocky planet on which we live and the third planet from the Sun.Nearest higher value · TimeAge of the universe13.8 GyrThe age of the universe is the time since the Big Bang, marking the beginning of cosmic expansion.Sources and method
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The source records and measurement method remain available for inspection.
More ways to see it
Curated comparisons
There’s always another scale
Follow your curiosity.
TimeBlink of an eye150 msA blink of an eye is the quick closing and opening of the eyelid, usually happening involuntarily.TimeHuman lifetime80 yearsA human lifetime is the span from a person's birth to their death.TimeAge of the universe13.8 GyrThe age of the universe is the time since the Big Bang, marking the beginning of cosmic expansion.SpaceEarth12,740 kmEarth is the rocky planet on which we live and the third planet from the Sun.
SpaceObservable universe28.21 GpcThe observable universe is the region from which light or other signals have had time to reach us since the early universe.TimeSince the non-avian dinosaurs66 MyrThe interval since the non-avian dinosaurs marks the time since these dinosaurs disappeared from Earth.TimeRecorded-history interval5 kyrThe recorded-history interval is the span for which humans have kept written or documented records.TimeA century100 yearsA century is a period of one hundred years.