Unit Converter

Unit conversion uses mathematical relationships between measurement systems. Each unit category (length, weight, temperature, volume, speed, area) has a set of conversion factors relative to a base unit. For example, in the length category, meters serve as the base unit, and all other units (kilometers, miles, feet, inches) have a known multiplication factor to convert to/from meters. The conversion process follows three steps: (1) Convert the input value from the source unit to the base unit, (2) Convert from the base unit to the target unit. This two-step approach ensures accuracy and allows any-to-any conversion within a category using only N factors instead of N-squared direct conversion pairs. Temperature is handled differently because the relationship between Celsius, Fahrenheit, and Kelvin is not a simple ratio — it involves both multiplication and addition (F = C * 9/5 + 32). The tool uses specific formulas for each temperature conversion pair. All conversion factors are hardcoded with high precision to avoid floating-point drift.

1. Select a category (Length, Weight, Temperature, Volume, Speed, Area). 2. Choose the source unit from the "From" dropdown. 3. Choose the target unit from the "To" dropdown. 4. Enter the value to convert. 5. The result appears instantly. 6. Click the swap button to reverse the conversion direction.

Length: Kilometer, Meter, Centimeter, Millimeter, Mile, Yard, Foot, Inch Weight: Kilogram, Gram, Milligram, Pound, Ounce, Ton (metric) Temperature: Celsius, Fahrenheit, Kelvin Volume: Liter, Milliliter, Gallon (US), Quart, Cup, Fluid Ounce Speed: km/h, m/s, mph, knot Area: Square meter, Square kilometer, Square foot, Square mile, Hectare, Acre