Short vowel (अ इ उ ऋ) = 1 mātrā (laghu)
Long vowel (आ ई ऊ ए ओ ऐ औ) = 2 mātrās (guru)
Consonant cluster makes preceding syllable heavy
Anusvāra (ं) or Visarga (ः) = adds 1 mātrā (guru)
How many total mātrās does this have?
नमः
namaḥ
Salutation / bow
Break it down: न(1) + म(1) + ः(1) — count each unit