How old is the earth according to the Bible?

It surprises many readers to learn that no verse in the Bible simply says, 'the earth is such-and-such years old.' Any figure given for the earth's age is the product of calculation and interpretation applied to the biblical text, not a direct statement lifted straight from a single verse. This is exactly why sincere, Bible-believing Christians have arrived at very different numbers, sometimes differing by billions of years, while agreeing completely that Scripture is true and that God alone created the earth (Genesis 1:1).

Understanding how each side arrives at its number helps explain why this remains a respectful, ongoing conversation among believers rather than a simple case of someone ignoring what the text plainly says.

Young earth creationists typically add together the ages recorded in the genealogies of Genesis 5 and Genesis 11, which trace an unbroken line from Adam to Abraham, along with later biblical chronological data, to arrive at a total. The most famous such calculation, by Archbishop James Ussher in the seventeenth century, placed creation around 4004 BC. This method assumes the genealogies are complete, tightly sequential king lists with no gaps, and that Genesis 1's days are ordinary 24-hour days, yielding an earth roughly six to ten thousand years old.

Proponents of this approach argue that treating the genealogies as tightly sequential is the most natural reading of the text, since each entry follows a consistent formula recording a father's age at his son's birth, his remaining years, and his death, a level of specific numerical detail that reads far more like careful historical record-keeping than a loose literary summary. They also note that Luke's genealogy of Jesus traces the same line back through Adam (Luke 3:23-38), treating these figures as real historical persons in a real chronological sequence, which young earth advocates take as further confirmation that the New Testament itself assumes a fairly straightforward reading of the numbers in Genesis 5 and 11.

Other scholars point out that biblical genealogies elsewhere sometimes skip generations for stylistic or theological reasons rather than functioning as tight, complete chronologies; Matthew's genealogy of Jesus, for example, deliberately compresses generations into three sets of fourteen (Matthew 1:17). They also note that the Greek Septuagint's version of Genesis 11 includes an additional generation, Cainan, not found in the standard Hebrew text used in most modern translations, showing that even ancient copyists handled these genealogies somewhat differently.

If the genealogies allow for gaps, as some Hebrew genealogies elsewhere in Scripture demonstrably do, calculating a precise total age from them becomes considerably less certain than a simple addition might suggest.

Old earth creationists weigh the genealogical uncertainty alongside converging evidence from astronomy, such as light from galaxies measured at millions of light years away, and from geology, such as the layered depth of sedimentary rock and the consistency of multiple independent radiometric dating methods. They argue that since God authored both Scripture and the natural world (Psalm 19:1, Romans 1:20), and since Scripture itself notes that God's sense of time differs radically from ours (2 Peter 3:8, echoing Psalm 90:4), a Genesis text silent on exact age leaves room to take this evidence seriously without compromising biblical authority.

Astronomers point out, for example, that we observe the light of supernovae in galaxies millions of light years away, meaning that light left its source long before any six-thousand-year timeline would allow, unless one appeals to God creating light already in transit, a proposal even many old earth creationists find theologically uncomfortable since it would mean some of what we observe in the night sky did not correspond to events that actually happened. Geologists similarly point to ice cores, coral growth bands, and layered sediment deposits that each independently suggest depositional histories far longer than a few thousand years, a convergence of unrelated methods that old earth creationists find more persuasive than any single dating method taken alone.

It is worth stepping back to notice what this debate does not touch: it does not touch whether God created everything that exists, whether Scripture is true and authoritative, or whether the gospel of Jesus Christ is the only way of salvation. Those foundations remain untouched no matter which number a believer accepts.

Study this question if it interests you, form a conviction, and hold it with confidence, but do not let a debate over calculation techniques and geological interpretation shake your confidence in the God who, in either six days or six billion years, spoke this universe into being for his glory and your good.