Contoh:
15 hg/L = 1.5e-9 Tg/L
1 hg/L = 1e-10 Tg/L | 1 Tg/L = 1e+10 hg/L
Langkah-langkah konversi:
15 × (100 / 1e+12) = 1.5e-9