Convert Synodic Months to Months
Convert Synodic Months (syn.mo) to Months (mo) instantly and accurately.
Conversion Formula
mo = syn.mo × 0.9702240737
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.
About Months
A mean Gregorian calendar month = 365.2425 ÷ 12 = 30.436875 days = 2,629,746 s exactly (averaged over the 400-year cycle with exactly 97 leap years). Individual months have 28-31 days. Loan schedules, subscriptions, and mobile billing reference 'per month', requiring explicit agreement on meaning. ISO 8601 uses 'P1M'. 1 mo = 30.436875 d = 2,629,746 s.
Quick Reference Table
| Synodic Months (syn.mo) | Months (mo) |
|---|---|
| 1 syn.mo | 0.970224 mo |
| 2 syn.mo | 1.94045 mo |
| 5 syn.mo | 4.85112 mo |
| 10 syn.mo | 9.70224 mo |
| 25 syn.mo | 24.2556 mo |
| 50 syn.mo | 48.5112 mo |
| 100 syn.mo | 97.0224 mo |