Contoh:
15 km³ = 3.962581e+12 gal (US)
1 km³ = 2.641721e+11 gal (US) | 1 gal (US) = 3.785412e-12 km³
Langkah-langkah konversi:
15 × (1e+9 / 0.003785412) = 3.962581e+12