Flood Calculation

And Noah was six hundred years old when the flood of waters was upon the earth.

Genesis 7:6

 

Event/Person	Passage	Total Time from Creation (years)
God created everything.	Genesis 1–2	0
Adam became the father of Seth at 130.	Genesis 5:3	0 + 130 = 130
Seth became the father of Enosh at 105.	Genesis 5:6	130 + 105 = 235
Enosh became the father of Kenan at 90.	Genesis 5:9	235 + 90 = 325
Cainan became the father of Mahalalel at 70.	Genesis 5:12	325 + 70 = 395
Mahalalel became the father of Jared at 65.	Genesis 5:15	395 + 65 = 460
Jared became the father of Enoch at 162.	Genesis 5:18	460 + 162 = 622
Enoch became the father of Methuselah at 65.	Genesis 5:21	622 + 65 = 687
Methuselah became the father of Lamech at 187.	Genesis 5:25	687 + 187 = 874
Lamech became the father of Noah at 182.	Genesis 5:28	874 + 182 = 1056
The Flood started when Noah was 600.	Genesis 7:6	1056 + 600 = 1656

"Since the Bible does not provide the number of months in the age of each patriarch listed from Adam to Noah, then we could add about five more years to this number. For example, Adam may have been 130 years and 10 months old when Seth was born, and Seth may have been 105 years and four months. On average, there would likely be an additional six months for each generation. The same would be true for the genealogy in Genesis 10." AIG