1-3/4 inch in decimal and mm
Decimal inches
1.75 in
Millimetres
44.45 mm
From the standard, the international inch, 25.4 mm exactly
The math
- A fraction is its top number divided by its bottom number: 1-3/4 in = 1 + 3 ÷ 4 = 1.75 in.
- An inch is exactly 25.4 mm, so 1.75 × 25.4 = 44.45 mm, or 44.450 mm to three places.
- In feet, divide by 12: 1.75 ÷ 12 = 0.145833 ft. In centimetres, divide the mm by 10: 4.445 cm.
- The same size in finer steps: 1-3/4 = 1-6/8 = 1-12/16 = 1-24/32 = 1-48/64. A tape marked in 16ths, 32nds or 64ths shows it at those marks.
Drills, plywood and lumber at 1-3/4 in
| Drill | Size | Off by |
|---|---|---|
| 1 in | 1 in | −0.75 in |
| 25 mm | 0.9843 in | −19.45 mm |
Every drill is on the drill bit size chart.
Bits of this size
Sizes either side
| Fraction | Decimal | mm |
|---|---|---|
| 1-11/16 in | 1.6875 in | 42.863 mm |
| 1-13/16 in | 1.8125 in | 46.038 mm |
Every size is on the fraction to decimal chart; any other size goes in the fraction to decimal calculator.