1-7/8 inch in decimal and mm
Decimal inches
1.875 in
Millimetres
47.625 mm
From the standard, the international inch, 25.4 mm exactly
The math
- A fraction is its top number divided by its bottom number: 1-7/8 in = 1 + 7 ÷ 8 = 1.875 in.
- An inch is exactly 25.4 mm, so 1.875 × 25.4 = 47.625 mm.
- In feet, divide by 12: 1.875 ÷ 12 = 0.15625 ft. In centimetres, divide the mm by 10: 4.7625 cm.
- The same size in finer steps: 1-7/8 = 1-14/16 = 1-28/32 = 1-56/64. A tape marked in 16ths, 32nds or 64ths shows it at those marks.
Drills, plywood and lumber at 1-7/8 in
No drill, plywood or lumber on our charts is exactly 1-7/8 in. The nearest drills are below.
| Drill | Size | Off by |
|---|---|---|
| 1 in | 1 in | −0.875 in |
| 25 mm | 0.9843 in | −22.625 mm |
Every drill is on the drill bit size chart.
Bits of this size
Sizes either side
| Fraction | Decimal | mm |
|---|---|---|
| 1-13/16 in | 1.8125 in | 46.038 mm |
| 1-15/16 in | 1.9375 in | 49.213 mm |
Every size is on the fraction to decimal chart; any other size goes in the fraction to decimal calculator.