Contoh:
15 Btu (IT), Btu = 15825837.7893 mJ
1 Btu (IT), Btu = 1055055.85262 mJ | 1 mJ = 9.478171e-7 Btu (IT), Btu
Langkah-langkah konversi:
15 × (1055.05585262 / 0.001) = 15825837.7893