MjṎ @ 6pt / 0.5em → 8px

MjṎ @ 9pt / 0.75em → 12px

MjṎ @ 12pt / 1em → 16px

MjṎ @ 18pt / 1.5em → 24px

MjṎ @ 24pt / 2em → 32px

MjṎ @ 36pt / 3em → 48px

6pt ⇅ 8px
12pt ⇅ 16px
24pt ⇅ 32px
36pt ⇅ 48px
48pt ⇅ 64px
60pt ⇅ 80px
72pt ⇅ 96px