Imperial to Metric Conversion

Nominal
 Actual – Imperial Actual – Metric
 1×2   3/4″ x 1-1/2″  19 x 38 mm
 1×3   3/4″ x 2-1/2″  19 x 64 mm
 1×4   3/4″ x 3-1/2″  19 x 89 mm
 1×6   3/4″ x 5-1/2″  19 x 140 mm
 1×8   3/4″ x 7-1/4″  19 x 184 mm
 1×10   3/4″ x 9-1/4″  19 x 235 mm
 1×12   3/4″ x 11-1/4″  19 x 286 mm
 2×2   1-1/2″ x 1-1/2″  38 x 38 mm
 2×4   1-1/2″ x 3-1/2″  38 x 89 mm
 2×6   1-1/2″ x 5-1/2″  38 x 140 mm
 2×8   1-1/2″ x 7-1/4″  38 x 184 mm
 2×10   1-1/2″ x 9-1/4″  38 x 235 mm
 2×12   1-1/2″ x 11-1/4″  38 x 286 mm
 4×4   3-1/2″ x 3-1/2″  89 x 89 mm