Unit Converter - Length Weight Data Size Conversion

Unit conversion is the process of converting a numerical value from one unit of measurement to another. Because different countries and industries use different standards, the same physical quantity can be expressed in many ways. For example, length can be expressed in meters, feet or inches; weight in kilograms, pounds or ounces; data size in KB, MB or GiB.

The core of unit conversion is the conversion factor. For most units, conversion only requires multiplying by a fixed factor, such as 1 inch = 2.54 cm and 1 pound ≈ 0.4536 kg. Some conversions, however, also require an additive offset. Temperature is the most typical example: 0℃ = 32℉, so converting between ℃ and ℉ requires both multiplication and addition/subtraction.

Our unit converter integrates common engineering, daily-life and IT units into one interface. Enter a value once and automatically get the target result plus all related unit results, saving you from repeatedly looking up conversion tables.

Different categories of units follow different conversion rules. Understanding these rules helps you quickly judge whether a result is reasonable.

Length and weight: these usually follow metric or imperial systems and only involve multiplication. For example, 1 km = 1000 m, 1 kg = 1000 g, 1 foot = 12 inches. Pay attention to whether units are metric or imperial.

Data size: this is the most confusing area. In computing, b means bit and B means byte, with 1 B = 8 b. In addition, disk manufacturers usually use decimal 1 KB = 1000 B, while operating systems usually use binary 1 KiB = 1024 B. This tool displays both KB/MB/GB/TB and KiB/MiB/GiB/TiB to avoid misunderstandings.

Temperature: conversions between Celsius, Fahrenheit and Kelvin are not pure proportional relationships. The formulas are ℉ = ℃ × 9/5 + 32 and K = ℃ + 273.15. This tool handles these offsets automatically.

Area and volume: area units are squares of length units, and volume units are cubes of length units. For example, 1 m² = 10,000 cm² and 1 m³ = 1,000,000 cm³. When converting from a large unit to a small unit, the result grows rapidly, so scientific notation or appropriate decimal precision is recommended.

Our unit converter uses a 100% pure frontend local calculation architecture: all input values and conversion results are processed in the browser, never uploaded to any server, and no records are kept. After refreshing the page, all inputs and results are cleared.

This means you can use the tool normally even without an internet connection. For users who need to work offline or in privacy-sensitive scenarios, this local processing approach is more reassuring.