Pouce
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://unitfyi.com/iframe/glossary/inch-def/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://unitfyi.com/glossary/inch-def/Add a dynamic SVG badge to your README or docs.
[](https://unitfyi.com/glossary/inch-def/)Use the native HTML custom element.
Définition
Une unité de longueur impériale définie comme exactement 2,54 centimètres ou 1/12 de pied.
Explication
The inch was historically defined as three barleycorns placed end to end. Since 1959, it has been fixed at exactly 2.54 cm by international agreement. Screen sizes (phones, TVs, monitors) are universally measured in diagonal inches: a 15-inch laptop screen measures 38.1 cm diagonally. Tire width and pipe diameter are also typically expressed in inches.
RELATED CONVERSIONS
RELATED ARTICLES
From milligrams to metric tons, this guide covers every major weight and mass unit with exact conversion factors, real-world examples, and a clear explanation of why weight and mass are not the same thing.
Volume Units Guide: Liters, Gallons, Cups, and MoreA thorough reference for every major volume unit—metric, US customary, imperial, and culinary—including exact conversion factors, US vs UK differences, and practical cooking and industrial examples.
Complete Guide to Length Units: From Nanometers to Light-YearsA comprehensive reference covering every major length unit—metric, imperial, nautical, and astronomical—with exact conversion factors and real-world scale examples.
RELATED TERMS
Système impérial
Un système de mesure utilisé principalement aux États-Unis, fondé sur les unités anglaises historiques.
Système troy
Un système de poids utilisé pour les métaux précieux et les pierres gemmes.
Avoirdupois
Le système de poids standard basé sur la livre de 16 onces, utilisé pour les marchandises courantes.
Cheval-vapeur
Une unité de puissance. Le cheval-vapeur mécanique est égal à environ 745,7 watts.
BTU (Unité thermique britannique)
La quantité de chaleur nécessaire pour élever la température d'une livre d'eau d'un degré Fahrenheit.