Convert Gigayears to Centuries
Convert Gigayears (Ga) to Centuries (cent) instantly and accurately.
Conversion Formula
cent = Ga × 10000000
About Gigayears
A gigayear (1 Ga) = 10⁹ yr ≈ 3.156 × 10¹⁶ s - the timescale of stellar evolution and cosmology. Universe age: 13.787 ± 0.020 Ga (Planck CMB). Sun: 4.603 Ga old; red giant in ~5 Ga. A 0.1 M☉ red dwarf lives ~10,000 Ga. Uranium-238 half-life = 4.468 Ga (used in radiometric dating). Proton decay (GUT prediction): ~10³⁴ yr = ~10²⁵ Ga. 1 Ga = 10⁹ yr.
About Centuries
A century = exactly 100 Gregorian years ≈ 3.156 × 10⁹ s. Standard unit of historical periodisation (the 20th century, the 18th-century Enlightenment). IPCC projects warming and sea-level rise on century timescales. Precession of the equinoxes advances ~1.39°/century, so zodiac constellations no longer match their named seasons. Ice-core and radiocarbon records are commonly displayed at century resolution. 1 century = 100 yr.
Quick Reference Table
| Gigayears (Ga) | Centuries (cent) |
|---|---|
| 1 Ga | 10000000 cent |
| 2 Ga | 20000000 cent |
| 5 Ga | 50000000 cent |
| 10 Ga | 100000000 cent |
| 25 Ga | 250000000 cent |
| 50 Ga | 500000000 cent |
| 100 Ga | 1000000000 cent |