Inch to Millimeter Conversion Charts

Need to know what inch sizes your metric sockets or wrenches match up with? Or which metric sizes correspond with your standard inch tools? You might find that it's helpful to have these size conversions handy.

Download PDF | Also available for sale as a Magnet or Waterproof Card

Download PDF | Also available for sale as a Magnet or Waterproof Card

Featured Tools

Combination Wrench Set with Rack, 34-Piece (1/4-1 in., 6-24 mm)

Combination Wrench Set with Holder, 25-Piece (1/4-3/4 in., 6-19 mm)

Combination Wrench Set with Pouch, 25-Piece (1/4-3/4 in., 6-19 mm)

1/4 Inch Drive 6-Point Socket & Ratchet Set, 56-Piece (5/32-9/16 in., 4-15 mm)

3/8 Inch Drive 6-Point Socket & Ratchet Set, 73-Piece (1/4-1 in., 6-24 mm)

1/2 Inch Drive 6-Point Socket & Ratchet Set, 57-Piece (3/8-1 in., 10-24 mm)