Convert Hours to Synodic Months
Convert Hours (h) to Synodic Months (syn.mo) instantly and accurately.
Conversion Formula
syn.mo = h × 0.001410966333
About Hours
An hour (h) = exactly 3,600 s. The 24-hour day traces to ancient Egypt (10 daylight hours + 2 twilight + 12 night star-rise periods). Time zones are integer or half-hour UTC offsets (exceptions: India +5:30, Nepal +5:45). The kilowatt-hour = 3,600,000 J; Tc-99m half-life = 6.0067 h. Drug dosing and pharmacokinetics are expressed in hours. 1 h = 3,600 s = 60 min = 1/24 day.
About Synodic Months
A synodic (lunar) month = new moon to new moon = 29.5306 days = 2,551,442.9 s. Longer than the sidereal month (27.32 d) because Earth advances ~27° in its orbit during that time; the Moon must travel further to realign with the Sun. Islamic Hijri, Hebrew lunisolar, and Chinese calendars are built on synodic months. Eclipses repeat via the Saros cycle (18 yr 11 d = 223 synodic months). 1 syn.mo ≈ 29.5306 d.
Quick Reference Table
| Hours (h) | Synodic Months (syn.mo) |
|---|---|
| 1 h | 0.00141097 syn.mo |
| 2 h | 0.00282193 syn.mo |
| 5 h | 0.00705483 syn.mo |
| 10 h | 0.0141097 syn.mo |
| 25 h | 0.0352742 syn.mo |
| 50 h | 0.0705483 syn.mo |
| 100 h | 0.141097 syn.mo |