1 inches to mm
1 inches = 25.4 millimeters
Need a different number? Type into either field below — it converts as you type.
By Numerly · Updated
How 1 inches to mm is calculated
Multiply by 25.4: 1 × 25.4 = 25.4. (1 in = 25.4 mm.)
Going the other way, 1 millimeter = 0.03937 inches.
Values near 1 in
| inches | millimeters |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 4 in | 101.6 mm |
| 5 in | 127 mm |
Frequently asked
- What is 1 inches to mm?
- 1 inches equals 25.4 millimeters.
- How do you convert 1 inches to millimeters?
- Multiply by 25.4: 1 × 25.4 = 25.4. (1 in = 25.4 mm.)
- Is 1 in more or less than 25.4 mm?
- They are equal — 1 inches is exactly 25.4 millimeters.