# day (sidereal) to year (mean tropical) conversion

Conversion number between day (sidereal) [d (sidereal)] and year (mean tropical) [a, y, or yr] is 0.0027304336479623. This means, that day (sidereal) is smaller unit than year (mean tropical).

### Contents [show][hide]

Switch to reverse conversion:
from year (mean tropical) to day (sidereal) conversion

### Enter the number in day (sidereal):

Decimal Fraction Exponential Expression
 [d (sidereal)]
eg.: 10.12345 or 1.123e5

Result in year (mean tropical)

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

### Calculation process of conversion value

• 1 day (sidereal) = (86164.09053083288) / (31556925.2507328) = 0.0027304336479623 year (mean tropical)
• 1 year (mean tropical) = (31556925.2507328) / (86164.09053083288) = 366.24219041041 day (sidereal)
• ? day (sidereal) × (86164.09053083288  ("s"/"day (sidereal)")) / (31556925.2507328  ("s"/"year (mean tropical)")) = ? year (mean tropical)

### High precision conversion

If conversion between day (sidereal) to second and second to year (mean tropical) is exactly definied, high precision conversion from day (sidereal) to year (mean tropical) 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!

### day (sidereal) to year (mean tropical) conversion chart

 Start value: [day (sidereal)] Step size [day (sidereal)] How many lines? (max 100)

visual:
day (sidereal)year (mean tropical)
00
100.027304336479623
200.054608672959247
300.08191300943887
400.10921734591849
500.13652168239812
600.16382601887774
700.19113035535736
800.21843469183699
900.24573902831661
1000.27304336479623
1100.30034770127586
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## Multiple conversion

Enter numbers in day (sidereal) and click convert button.
One number per line.

Converted numbers in year (mean tropical):
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## Details about day (sidereal) and year (mean tropical) units:

Convert Day (sidereal) to other unit:

### day (sidereal)

Definition of day (sidereal) unit: ≈ 23 h, 56 min, 4.0916 sec. A sidereal day is the time needed for the Earth to rotate once around its axis so that the distant stars appear in the same position in the sky. This is ~4 minutes shorter than the solar day.

Convert Year (mean tropical) to other unit:

### year (mean tropical)

Definition of year (mean tropical) unit: ≈ 365.242190402 d. Tropical year is the length of time it takes for the Sun to return to the same position in the cycle of seasons, approximately 365.24219 days

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