Convert Inches to Millimeters — Woodworking
Formula
mm = inches × 25.4
Why this matters in woodworking
One inch is defined as exactly 25.4 mm. This is the base conversion behind almost every shop measurement.
Inches to Millimeters reference table
| Inches (in) | Millimeters (mm) |
|---|---|
| 0.25 | 6.35 |
| 0.5 | 12.7 |
| 0.75 | 19.05 |
| 1 | 25.4 |
| 2 | 50.8 |
| 4 | 101.6 |
| 6 | 152.4 |
| 12 | 304.8 |
| 24 | 609.6 |
| 48 | 1,219.2 |
More woodworking converters
- Board feet → Cubic meters m³ = board feet × 0.002359737216 (1 bf = 144 in³)
- Board feet → Cubic feet ft³ = board feet ÷ 12
- Fractional inches → Millimeters mm = (fraction as decimal inches) × 25.4 e.g. 3/4" = 19.05 mm
- Feet → Meters m = feet × 0.3048