Unit Converter
Convert between different units of measurement with our easy-to-use calculator. Length, weight, volume, temperature, and more with instant results.
Unit Converter
Select Conversion Type
Conversion Formula
1 meter (m) = 100 centimeters (cm)
Therefore: 1 × 100 = 100 centimeters
Common Conversions
Understanding Unit Conversion
Unit conversion is the process of converting a measurement from one unit to another. It's an essential skill in science, engineering, cooking, construction, and many other fields.
Metric vs. Imperial Systems
The two most common measurement systems are the metric system (used in most of the world) and the imperial system (primarily used in the United States).
Metric System
- Based on powers of 10
- Standard prefixes (kilo-, centi-, milli-, etc.)
- Examples: meter, gram, liter
- Used in most countries worldwide
Imperial System
- Based on historical measurements
- More complex conversion factors
- Examples: inch, pound, gallon
- Primarily used in the United States
How to Convert Units
To convert units, you need to know the conversion factor between them. Then, you multiply the original measurement by this factor. For example, to convert from meters to feet:
- The conversion factor is 1 meter = 3.28084 feet
- Multiply your measurement in meters by 3.28084
- The result is your measurement in feet
Tip for Scientists and Engineers
When performing calculations, it's often easiest to convert all measurements to a single system (usually SI units) before beginning your calculations, then convert the final result if needed.
Frequently Asked Questions
Why are there different measurement systems?
Different measurement systems developed independently across cultures and throughout history. The imperial system evolved from various European systems, with units often based on body parts (feet, inches) or common objects. The metric system was developed during the French Revolution as a standardized, decimal-based system. Today, the metric system (officially known as the International System of Units or SI) is the global standard for scientific and most commercial use. However, the imperial system persists in the United States for everyday measurements and some specific industries worldwide, such as aviation.
How accurate are the conversions?
Our converter uses standard conversion factors that are accurate to multiple decimal places. For most everyday purposes, this precision is more than sufficient. However, for scientific or highly technical applications, you should be aware of the specific conversion standards applicable to your field. Some conversions, particularly between temperature scales, involve formulas rather than simple multiplication and may be rounded for display purposes. If you need extreme precision, consider using specialized scientific tools or reference materials.
Why do temperature conversions work differently?
Unlike other unit conversions, temperature conversions often involve both multiplication/division and addition/subtraction because different temperature scales have different zero points. For example, 0°C is the freezing point of water, while 0°F was originally defined as the freezing temperature of brine. To convert from Celsius to Fahrenheit, you use the formula F = (C × 9/5) + 32. For Kelvin conversions, you simply add or subtract 273.15 to/from Celsius (K = C + 273.15) because Kelvin and Celsius use the same size degree but different zero points.
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