Convert Tropical Years to Centuries
Convert Tropical Years (a_trop) to Centuries (cent) instantly and accurately.
Conversion Formula
cent = a_trop × 0.009999991512
About Tropical Years
The tropical year = time from March equinox to the next = 365.24219 days = 31,556,925.2 s - the year that governs the seasons. The Gregorian 97/400 leap rule approximates it as 365.2425 days, leaving a residual drift of only ~26.8 s/year. The tropical year shortens ~0.53 s per century due to tidal deceleration. Persian Solar Hijri and Mayan Haab' calendars also approximate it. 1 a_trop ≈ 365.24219 d.
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
| Tropical Years (a_trop) | Centuries (cent) |
|---|---|
| 1 a_trop | 0.00999999 cent |
| 2 a_trop | 0.02 cent |
| 5 a_trop | 0.05 cent |
| 10 a_trop | 0.0999999 cent |
| 25 a_trop | 0.25 cent |
| 50 a_trop | 0.5 cent |
| 100 a_trop | 0.999999 cent |