21.5 mm to AWG

21.5 mm = -8.26 AWG

mmAWG
15.5 mm-5.44
17.5 mm-6.48
19.5 mm-7.42
21.5-8.26
23.5 mm-9.03
25.5 mm-9.73
27.5 mm-10.38

21.5 mm = -8.26 AWG

Formula

d(mm) = 0.127 × 92^((36 − AWG) / 39) — the American Wire Gauge geometric progression