Unit Converter
Convert length, weight, area, volume, speed, data and temperature instantly.
Knowledge Base & Educational Companion: Measurement Systems
Converting between units means expressing the same physical quantity in a different scale. Every conversion here works by mapping a value through a common base unit.
1. Base Units
Each category has a base unit (metre, kilogram, litre…). A value is scaled to the base, then out to the target unit — keeping conversions consistent and reversible.
2. Metric vs Imperial
Metric units scale by powers of ten; imperial units use historical ratios (12 inches per foot, 16 ounces per pound). Both map cleanly to SI bases.
3. Temperature Is Special
Temperature scales are affine, not just multiplicative — Celsius, Fahrenheit and Kelvin have different zero points, so conversions add an offset as well as a factor.
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