Most modern English translations of the Bible relied on the Masoretic Text (MT) as their main source when translating the Old Testament.
If we were to compare the generations of patriarchs in Genesis (5:1-32 & 11:10-32, eg from the creation of Adam to birth of Abraham) the numbers of years in MT differed to the other sources, such as Greek Septuagint (eg Codex Vaticanus) and the Samaritan Pentateuch.
sources | numbers of years (age of patriarch when son was born) |
Masoretic Text | 1948 |
Septuagint (Codex Vaticanus) | 3314 |
Samaritan Pentateuch | 2249 |
I have noticed that the Latin source - the Vulgate Bible - match the years with the Masoretic Text.
Anyway, calculating the age of earth based on the Bible, will vary widely, depending on the source being used.