Unit Conversion Calculator
Convert between different units of measurement for length, mass, temperature, speed, and more.
Why & What
Units of measurement are the standardized quantities we use to describe the physical world. Different regions and fields use different systems—metric (SI), imperial, and various specialized units.
Understanding unit conversion is essential for science, engineering, cooking, travel, and everyday life. A mistake in unit conversion can lead to costly errors (like the Mars Climate Orbiter mission failure!).
Length Conversion
Educational Purpose Only: This calculator is provided for learning and educational purposes. For critical applications or professional use, please verify results with appropriate professional tools and expertise.
Mass Conversion
Temperature Conversion
Speed Conversion
Quick Reference
Length
- 1 inch = 2.54 cm
- 1 foot = 0.3048 m
- 1 mile = 1.609 km
Mass
- 1 pound = 0.4536 kg
- 1 ounce = 28.35 g
- 1 ton = 1000 kg
Temperature
- °F = (°C × 9/5) + 32
- K = °C + 273.15
- 0°C = 32°F = 273.15K
Limitations & Disclaimer
Important Limitations
- Conversion factors are rounded; very precise applications should use official standards.
- Temperature conversions are exact within floating-point precision.
- Does not include all possible units—only common ones.
- For educational purposes only.