Unit Converter
Convert between different units of measurement including length, weight, temperature, area, volume, and more.
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Measurement Systems
Metric System
Used worldwide, based on meters, grams, and liters. Uses decimal multiples (kilo, centi, milli).
Imperial System
Used in the United States, based on feet, pounds, and gallons. Uses fractions and specific conversion factors.
US Customary
Similar to imperial but with some differences in volume measurements. Used in the United States.
Common Conversion Factors
Length
Weight
Temperature
Unit Converter FAQs
What's the difference between metric and imperial systems?
The metric system is decimal-based and used worldwide, while the imperial system uses specific conversion factors and is primarily used in the United States. Metric units are generally easier to convert because they use powers of 10.
How accurate are the conversions?
Our conversions use standard conversion factors and are accurate for most practical purposes. For scientific or engineering applications, always verify with official standards as some conversions may have very small rounding differences.
Why are there different measurement systems?
Different measurement systems developed independently in various cultures and regions. The metric system was developed during the French Revolution for standardization, while imperial units evolved from older English measurement systems.
What's the most commonly converted unit?
Length conversions (especially between inches/centimeters and miles/kilometers) and temperature conversions (between Celsius and Fahrenheit) are among the most commonly used unit conversions worldwide.
Are there any units that don't convert directly?
Yes, temperature requires special formulas rather than simple multiplication. Some units also have different definitions in different contexts (like fluid ounces vs. weight ounces), so it's important to select the correct unit type.