Convert Tropical Years to Seconds
Convert Tropical Years (a_trop) to Seconds (s) instantly and accurately.
Conversion Formula
s = a_trop × 31556925.22
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 Seconds
The second (s) is the SI base unit of time, defined since 1967 as exactly 9,192,631,770 periods of the caesium-133 ground-state hyperfine transition at 0 K. Caesium fountain clocks realise this to ~10⁻¹⁶ (1 s lost per ~300 million years); optical lattice clocks (Sr, Yb) reach ~10⁻¹⁸. The second links to the metre via the defined speed of light c = 299,792,458 m/s exactly. 1 s = 1,000 ms = 1/60 min.
Quick Reference Table
| Tropical Years (a_trop) | Seconds (s) |
|---|---|
| 1 a_trop | 31556900 s |
| 2 a_trop | 63113900 s |
| 5 a_trop | 157785000 s |
| 10 a_trop | 315569000 s |
| 25 a_trop | 788923000 s |
| 50 a_trop | 1.578 × 109 s |
| 100 a_trop | 3.156 × 109 s |