Inches to Metric Converter (mm, cm, m)
The ultimate Swiss Army Knife for inch conversions. Supports decimal and fractional inputs (e.g., "5 1/2"). Outputs mm, cm, and meters simultaneously.
Examples: "10.5", "4 3/4", "15/16"
About
In construction, machining, and international trade, the divide between Imperial and Metric systems creates constant friction. The challenge is not just converting numbers, but handling the format of the inputs. Inches are rarely clean decimals; they are often mixed fractions (e.g., 5 1/2") or complex fractions (e.g., 27/64") found on drill bits and fasteners. Converting these manually requires two steps: fraction-to-decimal, then decimal-to-metric.
This tool automates the entire workflow. It acts as a universal parser, accepting integers, decimals, and mixed fractions. By outputting Millimeters, Centimeters, and Meters simultaneously, it eliminates the need for multiple searches. Whether you are a carpenter framing a wall or a machinist selecting a drill bit, this tool ensures the conversion is precise to industry standards ($1 \text{ inch} = 25.4 \text{ mm}$).
Formulas
The core standard defined in 1959 establishes the exact value of the inch.
To handle fractions, the tool first computes the decimal sum:
Reference Data
| Fractional Inch | Decimal Inch | Millimeters (mm) |
|---|---|---|
| 1/64" | 0.0156 | 0.3969 |
| 1/32" | 0.0313 | 0.7938 |
| 1/16" | 0.0625 | 1.5875 |
| 1/8" | 0.1250 | 3.1750 |
| 1/4" | 0.2500 | 6.3500 |
| 3/8" | 0.3750 | 9.5250 |
| 1/2" | 0.5000 | 12.7000 |
| 5/8" | 0.6250 | 15.8750 |
| 3/4" | 0.7500 | 19.0500 |
| 7/8" | 0.8750 | 22.2250 |
| 1" | 1.0000 | 25.4000 |