639.5 mm to AWG

639.5 mm = -37.52 AWG

mmAWG
624.5 mm-37.32
629.5 mm-37.38
634.5 mm-37.45
639.5-37.52
644.5 mm-37.59
649.5 mm-37.65
654.5 mm-37.72

639.5 mm = -37.52 AWG

Formula

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