12 Notes

The 7 Solfa Syllables:

Carnatic	Western	Hindustani
Sa	Do	Sa
Ri	Re	Re
Ga	Mi	Ga
Ma	Fa	Ma
Pa	So	Pa
Dha	La	Dha
Ni	Ti	Ni

Names and equivalents of the 12 basic notes of Indian music:

Carnatic					Western			Hindustani
Full Name		Short forms		Alt¹	Interval	Cents²	Note³	Full Name	Short forms
1	Shadjam	Sa	S		P1	0	C	Shadj	S	S
2	Suddha Rishabham	Ri1	R1		m2	100	Db	Komal Rishab	kR	R1
3	Chatusruthi Rishabham	Ri2	R2		M2	200	D	Suddh Rishab	R	R2
3	Suddha Gantharam⁴	Ga1	G1	G0	M2	200	Ebb	Suddh Rishab	R	R2
4	Shatsruthi Rishabham⁴	Ri3	R3		m3	300	D#	Komal Gandhar	kG	G1
4	Saadarana Gantharam	Ga2	G2	G1	m3	300	Eb	Komal Gandhar	kG	G1
5	Antara Gantharam	Ga3	G3	G2	M3	400	E	Suddh Gandhar	G	G2
6	Suddha Madhyamam	Ma1	M1		P4	500	F	Suddh Madhyam	M	M1
7	Prati Madhyamam	Ma2	M2		+4	600	F#	Tivra Madhyam	tM	M2
8	Panchamam	Pa	P		P5	700	G	Pancham	P	P
9	Suddha Dhaivatham	Da1	D1		m6	800	Ab	Komal Dhaivat	kD	D1
10	Chatusruthi Dhaivatham	Da2	D2		M6	900	A	Suddh Dhaivat	D	D2
10	Suddha Nishadham⁴	Ni1	N1	N0	M6	900	Bbb	Suddh Dhaivat	D	D2
11	Shatsruthi Dhaivatham⁴	Da3	D3		m7	1000	A#	Komal Nishad	kN	N1
11	Kaisiki Nishadham	Ni2	N2	N1	m7	1000	Bb	Komal Nishad	kN	N1
12	Kaakali Nishadham	Ni3	N3	N2	M7	1100	B	Suddh Nishad	N	N2

¹ Instead of labeling the 3 Ga-s and the 3 Ni-s using {1,2,3}, some authors have used {0,1,2} instead. This alternate numbering scheme also makes comparison to the Western and Hindustani notes easier. Both conventions are present in the literature, sometimes causing unnecessary confusion to novices! Note also that in this alternate scheme, all "vivadhi notes" are labeled by 0 or 3, and all notes labeled with a 0 or 3 are vivadhi.
² Western Equal Temperament tuning.
³ Note names if and only if "C" is chosen as the tonic. If another note, say F#, is chosen as the tonic, then this column would have to be modified. The point is that the Indian notes correspond to the intervals - P1, m2, M2 , ..., M7 - rather than to absolute pitches/frequencies. The artist can choose Sa/the tonic to be any frequency he or she desires at the beginning of a performance.
⁴ Vivadhi notes. These are are not new intervals/swarasthanams, but are enharmonic to 4 other "normal" notes. Ie, out of the sixteen Carnatic notes listed, there are only twelve unique intervals.

Some points to keep in mind:

Ignoring the vivadhi notes, the 12 notes of the 3 systems are similar. Except for the tonic and the fifth, there are two versions of each of the other swarams.
The nomenclature of Carnatic and Hindustani music is different. For example, Suddha Ri in Carnatic music is different from the Suddh Re of Hindustani music. There are other examples too in the table above.
The "Suddh" scale of Hindustani music - rag Bilawal - is analogous to the major scale of Western music. Carnatic students however are taught a different scale first when they start music lessons - ragam Maayamaalavagaulai: S R1 G3 M1 P D1 N3 S.

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the original was here https://ccrma.stanford.edu/~arvindh/cmt/the_12_notes.html posted here just in case it disappears.