# month (synodic) to year (sidereal) conversion

Conversion number between month (synodic) [mo] and year (sidereal) [a, y, or yr] is 0.08084893788505. This means, that month (synodic) is smaller unit than year (sidereal).

### Contents [show][hide]

Switch to reverse conversion:
from year (sidereal) to month (synodic) conversion

### Enter the number in month (synodic):

Decimal Fraction Exponential Expression
 [mo]
eg.: 10.12345 or 1.123e5

Result in year (sidereal)

?
 precision 0 1 2 3 4 5 6 7 8 9 [info] Decimal: Exponential:

### Calculation process of conversion value

• 1 month (synodic) = (2551442.890) / (31558149.7635456) = 0.08084893788505 year (sidereal)
• 1 year (sidereal) = (31558149.7635456) / (2551442.890) = 12.368746283616 month (synodic)
• ? month (synodic) × (2551442.890  ("s"/"month (synodic)")) / (31558149.7635456  ("s"/"year (sidereal)")) = ? year (sidereal)

### High precision conversion

If conversion between month (synodic) to second and second to year (sidereal) is exactly definied, high precision conversion from month (synodic) to year (sidereal) is enabled.

Since definition contain rounded number(s) too, there is no sense for high precision calculation, but if you want, you can enable it. Keep in mind, that converted number will be inaccurate due this rounding error!

### month (synodic) to year (sidereal) conversion chart

 Start value: [month (synodic)] Step size [month (synodic)] How many lines? (max 100)

visual:
month (synodic)year (sidereal)
00
100.8084893788505
201.616978757701
302.4254681365515
403.233957515402
504.0424468942525
604.850936273103
705.6594256519535
806.467915030804
907.2764044096545
1008.084893788505
1108.8933831673555
Copy to Excel

## Multiple conversion

Enter numbers in month (synodic) and click convert button.
One number per line.

Converted numbers in year (sidereal):
Click to select all

## Details about month (synodic) and year (sidereal) units:

Convert Month (synodic) to other unit:

### month (synodic)

Definition of month (synodic) unit: ≈ 29.530589 days. Synodic month = Cycle time of moon phases (example, from fool moon to next fool moon). This period is not constant and it is longer than moon rotation around Earth (sidereal month), because moon and Earth moves together around the Sun.

Convert Year (sidereal) to other unit:

### year (sidereal)

Definition of year (sidereal) unit: ≈ 365.256363004 d. Sidereal year is a time taken for Sun to return to the same position with respect to the stars of the celestial sphere, approximately 365.256363 days.

← Back to Time units