Unit Converter
Fast, accurate unit conversions across common categories
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Universal Unit Converter
Convert between thousands of units across Metric (SI), Imperial, and US Customary systems. Whether you're an engineer, student, or chef, this tool handles everything from femtoseconds to light-years with up to 12 decimal places of precision.
Supported Categories
Advanced Features
- Custom Units: Define your own units! e.g., "1 Widget = 0.5 Meters". Useful for project-specific measurements.
- Precision: Adjust decimal places from 0 to 12. Use "Floor" or "Ceil" rounding for safety margins.
- Portability: Export your settings, history, and custom units to a JSON file to transfer between devices.
Understanding Unit Systems
| System | Description | Examples |
|---|---|---|
| SI (Metric) | The international standard. Base-10 scaling. Used by science and most of the world. | Meter, Kilogram, Pascal |
| Imperial | Traditional British system. distinct from US Customary in volumes. | Stone, Imperial Gallon |
| US Customary | Based on British units but standardized differently. | Inch, US Gallon, Pound |