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Woodworking Math

35/64 inch in decimal and mm

Decimal inches

0.546875 in

0.5469 in to four places

Millimetres

13.890625 mm

From the standard, the international inch, 25.4 mm exactly

The math

  1. A fraction is its top number divided by its bottom number: 35/64 in = 35 ÷ 64 = 0.546875 in.
  2. An inch is exactly 25.4 mm, so 0.546875 × 25.4 = 13.890625 mm, or 13.891 mm to three places.
  3. In feet, divide by 12: 0.546875 ÷ 12 = 0.045573 ft. In centimetres, divide the mm by 10: 1.3890625 cm.

35/64 to the nearest 1/8, 1/16, 1/32

A tape or rule marked more coarsely than 64ths can’t show 35/64 exactly. The nearest marks, and how far off each is (plus means the mark is bigger; a size exactly halfway goes to the bigger mark):

NearestMarkOff by (in)Off by (mm)
1/81/2 in−0.046875−1.191
1/169/16 in+0.015625+0.397
1/329/16 in+0.015625+0.397

Drills, plywood and lumber at 35/64 in

Drills either side of 35/64 in
DrillSizeOff by
13.5 mm0.5315 in−0.3906 mm
14 mm0.5512 in+0.1094 mm

Every drill is on the drill bit size chart.

Bits of this size

Sizes either side

FractionDecimalmm
17/32 in0.53125 in13.494 mm
9/16 in0.5625 in14.288 mm

Every size is on the fraction to decimal chart; any other size goes in the fraction to decimal calculator.