Millisecond to Sidereal Day Converter

Time Converter

21 units available

Decimals:

From

To

1.160576e-8

1 ms = 1.160576e-8 sid day

Formula:

sid day = ms × 1.160576e-8

With your value: 1 ms = 1.160576e-8 sid day

How big is that?

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

Your value1.00 ms

Blink of an eye (3.0e+2× your value)300 ms

Minute (6.0e+4× your value)6.00e+4 ms

Working day (2.9e+7× your value)2.88e+7 ms

Day (8.6e+7× your value)8.64e+7 ms

Week (6.0e+8× your value)6.05e+8 ms

Other Millisecond to Sidereal Day conversions

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

Millisecond to Sidereal Day Conversion Table

Millisecond (ms)	Sidereal Day (sid day)
0.5	5.802881e-9
1	1.160576e-8
2	2.321153e-8
5	5.802881e-8
10	1.160576e-7
15	1.740864e-7
20	2.321153e-7
25	2.901441e-7
50	5.802881e-7
100	1.160576e-6
250	2.901441e-6
500	5.802881e-6
1000	1.160576e-5

Sidereal Day to Millisecond Conversion Table

Sidereal Day (sid day)	Millisecond (ms)
0.5	43,082,045.25
1	86,164,090.5
2	172,328,181
5	430,820,452.5
10	861,640,905
15	1,292,461,357.5
20	1,723,281,810
25	2,154,102,262.5
50	4,308,204,525
100	8,616,409,050
250	21,541,022,625
500	43,082,045,250
1000	86,164,090,500

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.

Millisecond (ms)

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

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

How to Convert Millisecond to Sidereal Day

To convert from Millisecond (ms) to Sidereal Day (sid day), multiply the value by 1.160576e-8.

Formula: sid day = ms × 1.160576e-8

Reverse: ms = sid day × 86,164,090.5

Step-by-Step Example

Start with your value in Millisecond. For example: 5 ms
Multiply by the conversion factor: 5 x 1.160576e-8
The result is: 5.802881e-8 sid day

About Millisecond

The millisecond (ms) is a unit of time. One millisecond equals 0.001 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 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.

Frequently Asked Questions

How many Sidereal Day are in 1 Millisecond?

There are exactly 1.160576e-8 Sidereal Day in 1 Millisecond. This means the conversion factor from Millisecond to Sidereal Day is 1.160576e-8.

What is the formula to convert Millisecond to Sidereal Day?

The formula to convert Millisecond to Sidereal Day is: sid day = ms × 1.160576e-8. For example, to convert 10 Millisecond to Sidereal Day, you would multiply 10 by 1.160576e-8.

What is a Millisecond?