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About Metric and Imperial Systems
The metric system (International System of Units, or SI) is used by 95% of the world's population for everyday measurements. Based on powers of 10, it provides elegant simplicity for conversion: 1 kilometer = 1,000 meters = 100,000 centimeters. The imperial system (and its close cousin, US customary units) is primarily used in the United States, with partial use in the UK, Canada, and a few other countries.
Our metric to imperial converter handles the most common conversion pairs across length, weight, and temperature — the three categories where metric-imperial conversion is most frequently needed. Each converter below provides instant, accurate results with detailed explanations and conversion tables.
Most Common Conversions
| Metric | Imperial |
|---|---|
| 1 meter | 3.28084 feet |
| 1 cm | 0.393701 inches |
| 1 km | 0.621371 miles |
| 1 kg | 2.20462 pounds |
| 1 gram | 0.035274 ounces |
| 0°C | 32°F |
| 100°C | 212°F |
Metric System Worldwide Usage
The metric system has been adopted by almost every country in the world. As of 2026, only three countries have not officially adopted the metric system: the United States, Liberia, and Myanmar. Even in these countries, metric is used in science, medicine, and international trade. The global standardization of metric units facilitates international commerce, scientific collaboration, and cultural exchange. Understanding both systems and being able to convert between them remains an essential skill in our interconnected world.
Popular Conversions
Official Sources & References
Our conversion data is based on internationally recognized standards:
- NIST Official Conversions
- BIPM — SI Units
- Wikipedia — Metric System
- Wikipedia — Imperial Units
- Metric Conversions Reference
This converter is for informational and educational purposes only. Always verify critical measurements with official standards.