Month (30 days) to Sidereal Day Converter

Time Converter

21 units available

Decimals:

From

To

30.082137

1 mo = 30.082137 sid day

Formula:

sid day = mo × 30.0821372913

With your value: 1 mo = 30.08213729 sid day

How big is that?

Everyday references on a logarithmic scale, all expressed in month (30 days) so you can sanity-check the result.

Minute (1/4.3e+4 your value)0.0000231 mo

Working day (1/90 your value)0.0111 mo

Day (1/30 your value)0.0333 mo

Week (1/4.3 your value)0.233 mo

Your value1.00 mo

Year (12× your value)12.2 mo

Other Month (30 days) to Sidereal Day conversions

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

Month (30 days) to Sidereal Day Conversion Table

Month (30 days) (mo)	Sidereal Day (sid day)
0.5	15.041069
1	30.082137
2	60.164275
5	150.410686
10	300.821373
15	451.232059
20	601.642746
25	752.053432
50	1,504.106865
100	3,008.213729
250	7,520.534323
500	15,041.068646
1000	30,082.137291

Sidereal Day to Month (30 days) Conversion Table

Sidereal Day (sid day)	Month (30 days) (mo)
0.5	0.016621
1	0.033242
2	0.066485
5	0.166212
10	0.332423
15	0.498635
20	0.664846
25	0.831058
50	1.662116
100	3.324232
250	8.31058
500	16.621159
1000	33.242319

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.

Month (30 days) (mo)

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 Month (30 days) to Sidereal Day

To convert from Month (30 days) (mo) to Sidereal Day (sid day), multiply the value by 30.0821372913.

Formula: sid day = mo × 30.0821372913

Reverse: mo = sid day × 0.0332423189

Step-by-Step Example

Start with your value in Month (30 days). For example: 5 mo
Multiply by the conversion factor: 5 x 30.0821372913
The result is: 150.410686 sid day

About Month (30 days)

The month (30 days) (mo) is a unit of time. One month (30 days) equals 2.592000 × 10^+6 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 Month (30 days)?

There are exactly 30.0821372913 Sidereal Day in 1 Month (30 days). This means the conversion factor from Month (30 days) to Sidereal Day is 30.0821372913.

What is the formula to convert Month (30 days) to Sidereal Day?

The formula to convert Month (30 days) to Sidereal Day is: sid day = mo × 30.0821372913. For example, to convert 10 Month (30 days) to Sidereal Day, you would multiply 10 by 30.0821372913.

What is a Month (30 days)?