Sidereal Day to Year (Leap) Converter

Time Converter

21 units available

Decimals:

From

To

0.002725

1 sid day = 0.002725 yr

Formula:

yr = sid day × 0.0027247802

With your value: 1 sid day = 0.00272478 yr

How big is that?

Everyday references on a logarithmic scale, all expressed in sidereal day so you can sanity-check the result.

Minute (1/1.4e+3 your value)0.000696 sid day

Working day (1/3.0 your value)0.334 sid day

Your value1.00 sid day

Day (1.0× your value)1.00 sid day

Week (7.0× your value)7.02 sid day

Year (3.7e+2× your value)366 sid day

Other Sidereal Day to Year (Leap) conversions

2 sid day to yr 3 sid day to yr 4 sid day to yr 5 sid day to yr 6 sid day to yr 7 sid day to yr 8 sid day to yr

Sidereal Day to Year (Leap) Conversion Table

Sidereal Day (sid day)	Year (Leap) (yr)
0.5	0.001362
1	0.002725
2	0.00545
5	0.013624
10	0.027248
15	0.040872
20	0.054496
25	0.06812
50	0.136239
100	0.272478
250	0.681195
500	1.36239
1000	2.72478

Year (Leap) to Sidereal Day Conversion Table

Year (Leap) (yr)	Sidereal Day (sid day)
0.5	183.501037
1	367.002075
2	734.00415
5	1,835.010375
10	3,670.02075
15	5,505.031124
20	7,340.041499
25	9,175.051874
50	18,350.103748
100	36,700.207495
250	91,750.518738
500	183,501.037477
1000	367,002.074954

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Sidereal Day (sid day)

Time

SI definition

Traceable to the second, defined by fixing the caesium-133 hyperfine transition frequency at 9 192 631 770 Hz.

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

Year (Leap) (yr)

Time

SI definition

Traceable to the second, defined by fixing the caesium-133 hyperfine transition frequency at 9 192 631 770 Hz.

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

How to Convert Sidereal Day to Year (Leap)

To convert from Sidereal Day (sid day) to Year (Leap) (yr), multiply the value by 0.0027247802.

Formula: yr = sid day × 0.0027247802

Reverse: sid day = yr × 367.0020749537

Step-by-Step Example

Start with your value in Sidereal Day. For example: 5 sid day
Multiply by the conversion factor: 5 x 0.0027247802
The result is: 0.013624 yr

About Sidereal Day

The sidereal day (sid day) is a unit of time. One sidereal day equals 86164.0905 seconds. UnitConvertLab converts it against every other time unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: time calculations, engineering and science, education.

About Year (Leap)

The year (leap) (yr) is a unit of time. One year (leap) equals 3.162240 × 10^+7 seconds. UnitConvertLab converts it against every other time unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: time calculations, engineering and science, education.

Frequently Asked Questions

How many Year (Leap) are in 1 Sidereal Day?

There are exactly 0.0027247802 Year (Leap) in 1 Sidereal Day. This means the conversion factor from Sidereal Day to Year (Leap) is 0.0027247802.

What is the formula to convert Sidereal Day to Year (Leap)?

The formula to convert Sidereal Day to Year (Leap) is: yr = sid day × 0.0027247802. For example, to convert 10 Sidereal Day to Year (Leap), you would multiply 10 by 0.0027247802.

What is a Sidereal Day?