Length
Welcome to YounitConverter
YounitConverter handles unit conversions across science, engineering, and everyday life. It covers more than 80 categories and thousands of units, from basic length and weight to specialized physics and chemistry units. Need a quick kitchen measurement or a precise engineering figure? Both take the same couple of clicks.
The world runs on more than one measurement system. The metric system (SI units) dominates science and most countries. The imperial system stays common in the United States, the United Kingdom, and a handful of other nations. Converting between them matters for international trade, scientific research, manufacturing, and everyday tasks like cooking or travel.
Students check homework, engineers size specifications, scientists analyze data, chefs scale recipes, and travelers make sense of unfamiliar units. YounitConverter gives all of them fast, accurate answers. Every conversion factor comes from an authoritative standards body, so the numbers hold up.
Popular Conversions
| From | To | Factor |
|---|---|---|
| 1 mile | kilometers | 1.609 |
| 1 kg | pounds | 2.205 |
| 1 inch | centimeters | 2.540 |
| 1 gallon (US) | liters | 3.785 |
| 1 foot | meters | 0.3048 |
| 1 ounce | grams | 28.35 |
| 1 cup (US) | milliliters | 236.6 |
| 1 horsepower | watts | 745.7 |
| 1 psi | kilopascals | 6.895 |
| 1 acre | hectares | 0.4047 |
Popular Conversion Categories
Our most-used converters cover everyday measurement needs:
- Length – meters, feet, inches, miles, kilometers, and more
- Weight/Mass – kilograms, pounds, ounces, grams, tons
- Temperature – Celsius, Fahrenheit, Kelvin conversions
- Volume – liters, gallons, cups, fluid ounces, cubic meters
- Area – square meters, acres, hectares, square feet
- Speed – km/h, mph, m/s, knots
- Time – seconds, minutes, hours, days, weeks, years
Scientific & Engineering Categories
For technical professionals and students, we offer specialized converters covering advanced physics, chemistry, and engineering disciplines:
- Thermodynamics – entropy, thermal conductivity, heat capacity, thermal resistance, specific heat
- Fluid Mechanics – dynamic and kinematic viscosity, flow rate, pressure, permeability, surface tension
- Electromagnetics – electric charge, capacitance, inductance, magnetic flux, field strength, conductivity
- Optics & Photometry – luminance, illumination, luminous flux, wavelength, luminous intensity
- Nuclear & Radiation – activity (Bq/Ci), absorbed dose (Gy/rad), dose equivalent (Sv/rem), exposure
- Chemistry – molar concentration, molar mass, catalytic activity, solution concentration
Each converter covers a full range of units, from SI base units to specialized industry units. Our scientific converters maintain the precision required for laboratory calculations, research papers, and engineering specifications.
Explore & Learn
Go beyond conversions with our educational resources:
- Learning Center – In-depth articles about measurement history, science, and applications
- About YounitConverter – Learn about our accuracy standards and data sources