Conversions et unités · Glossaire
What is Metric vs. Imperial?
Définition rapide
Metric (SI) and Imperial (US customary) are the two main measurement systems. They differ in base units and conversion factors.
Explication complète
The metric system (SI) is the international standard, used by all countries except the US, Liberia, and Myanmar. It is decimal-based: 1 km = 1,000 m, 1 kg = 1,000 g. Imperial (or US Customary) uses older English units: inches, feet, pounds, gallons. Common conversions: 1 inch = 2.54 cm, 1 foot = 0.3048 m, 1 pound = 0.4536 kg, 1 gallon = 3.785 L. Within the US, fluid ounces, cups, pints, quarts, and gallons differ from their UK counterparts. The UK officially uses metric for most things but pints and miles persist culturally. Conversions are critical in science, engineering, cooking, and international trade.
Calculatrices liées
Calculators that use or explain Metric vs. Imperial.
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Last reviewed: June 15, 2026 • Category: Conversions et unités