Sidereal Year to Year (Leap) Converter

Time Converter

21 units available

Decimals:

From

To

0.997968

1 sid yr = 0.997968 yr

Formula:

yr = sid yr × 0.9979681967

With your value: 1 sid yr = 0.9979682 yr

How big is that?

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

Minute (1/5.3e+5 your value)0.00000190 sid yr

Working day (1/1.1e+3 your value)0.000913 sid yr

Day (1/3.7e+2 your value)0.00274 sid yr

Week (1/52 your value)0.0192 sid yr

Year (1/1.0 your value)1.00 sid yr

Your value1.00 sid yr

Other Sidereal Year to Year (Leap) conversions

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

Sidereal Year to Year (Leap) Conversion Table

Sidereal Year (sid yr)	Year (Leap) (yr)
0.5	0.498984
1	0.997968
2	1.995936
5	4.989841
10	9.979682
15	14.969523
20	19.959364
25	24.949205
50	49.89841
100	99.79682
250	249.492049
500	498.984098
1000	997.968197

Year (Leap) to Sidereal Year Conversion Table

Year (Leap) (yr)	Sidereal Year (sid yr)
0.5	0.501018
1	1.002036
2	2.004072
5	5.01018
10	10.020359
15	15.030539
20	20.040719
25	25.050898
50	50.101797
100	100.203594
250	250.508985
500	501.01797
1000	1,002.03594

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 Year (sid 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

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 Year to Year (Leap)

To convert from Sidereal Year (sid yr) to Year (Leap) (yr), multiply the value by 0.9979681967.

Formula: yr = sid yr × 0.9979681967

Reverse: sid yr = yr × 1.0020359399

Step-by-Step Example

Start with your value in Sidereal Year. For example: 5 sid yr
Multiply by the conversion factor: 5 x 0.9979681967
The result is: 4.989841 yr

About Sidereal Year

The sidereal year (sid yr) is a unit of time. One sidereal year equals 3.155815 × 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.

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 Year?

There are exactly 0.9979681967 Year (Leap) in 1 Sidereal Year. This means the conversion factor from Sidereal Year to Year (Leap) is 0.9979681967.

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

The formula to convert Sidereal Year to Year (Leap) is: yr = sid yr × 0.9979681967. For example, to convert 10 Sidereal Year to Year (Leap), you would multiply 10 by 0.9979681967.

What is a Sidereal Year?