Devanagari Transliteration Methods

I give below the details of various methods adopted for transliterating Devanagari Script.

( Source - https://en.wikipedia.org/wiki/Transliteration)

Transliteration comparison

The following is a comparison of the major transliteration methods used for Devanāgarī.

Vowels

Devanāgarī	IAST	Harvard-Kyoto	ITRANS	Velthuis	SLP1
अ	a	a	a	a	a
आ	ā	A	A/aa	aa	A
इ	i	i	i	i	i
ई	ī	I	I/ii	ii	I
उ	u	u	u	u	u
ऊ	ū	U	U/uu	uu	U
ए	e	e	e	e	e
ऐ	ai	ai	ai	ai	E
ओ	o	o	o	o	o
औ	au	au	au	au	O
ऋ	ṛ	R	RRi/R^i	.r	f
ॠ	ṝ	RR	RRI/R^I	.rr	F
ऌ	ḷ	lR	LLi/L^i	.l	x
ॡ	ḹ	lRR	LLI/L^I	.ll	X
अं	ṃ	M	M/.n/.m	.m	M
अः	ḥ	H	H	.h	H
अँ			.N		~

Consonants

The Devanāgarī consonant letters include an implicit 'a' sound. In all of the transliteration systems, that 'a' sound must be represented explicitly.

Devanāgarī	IAST	Harvard-Kyoto	ITRANS	Velthuis	SLP1
क	ka	ka	ka	ka	ka
ख	kha	kha	kha	kha	Ka
ग	ga	ga	ga	ga	ga
घ	gha	gha	gha	gha	Ga
ङ	ṅa	Ga	~Na	"na	Na
च	ca	ca	cha	ca	ca
छ	cha	cha	Cha	cha	Ca
ज	ja	ja	ja	ja	ja
झ	jha	jha	jha	jha	Ja
ञ	ña	Ja	~na	~na	Ya
ट	ṭa	Ta	Ta	.ta	wa
ठ	ṭha	Tha	Tha	.tha	Wa
ड	ḍa	Da	Da	.da	qa
ढ	ḍha	Dha	Dha	.dha	Qa
ण	ṇa	Na	Na	.na	Ra
त	ta	ta	ta	ta	ta
थ	tha	tha	tha	tha	Ta
द	da	da	da	da	da
ध	dha	dha	dha	dha	Da
न	na	na	na	na	na
प	pa	pa	pa	pa	pa
फ	pha	pha	pha	pha	Pa
ब	ba	ba	ba	ba	ba
भ	bha	bha	bha	bha	Ba
म	ma	ma	ma	ma	ma
य	ya	ya	ya	ya	ya
र	ra	ra	ra	ra	ra
ल	la	la	la	la	la
व	va	va	va/wa	va	va
श	śa	za	sha	"sa	Sa
ष	ṣa	Sa	Sha	.sa	za
स	sa	sa	sa	sa	sa
ह	ha	ha	ha	ha	ha

Irregular consonant clusters

Devanāgarī	ISO 15919	Harvard-Kyoto	ITRANS	Velthuis	SLP1
क्ष	kṣa	kSa	kSa/kSha/xa	k.sa	kza
त्र	tra	tra	tra	tra	tra
ज्ञ	jña	jJa	GYa/j~na	j~na	jYa
श्र	śra	zra	shra	"sra	Sra