Unit Converter
Convert between length, weight, temperature, area, volume, speed, and data storage units instantly.
All Conversions
About Unit Converter
Units of measurement are essential in science, engineering, cooking, fitness, travel, and everyday life. The metric system (SI) is used globally in science and by most countries, while the imperial system (US customary) remains common in the United States for daily measurements. Converting between these systems — and within them — is a frequent need for professionals and everyday users alike.
This unit converter covers seven major categories: length, weight (mass), temperature, area, volume, speed, and data storage. Each category includes both metric and imperial units, plus specialized units for specific fields. All conversions are calculated with high precision using standard conversion factors, and the results are displayed in a scientific notation format when numbers are very large or very small.
Supported Categories
Length: millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, nautical miles. Weight: milligrams, grams, kilograms, metric tons, ounces, pounds, stones. Temperature: Celsius, Fahrenheit, Kelvin. Area: square meters, square kilometers, square feet, square yards, acres, hectares, square miles. Volume: milliliters, liters, cubic meters, teaspoons, tablespoons, fluid ounces, cups, pints, quarts, gallons. Speed: meters per second, kilometers per hour, miles per hour, knots, feet per second. Data: bits, bytes, kilobytes, megabytes, gigabytes, terabytes, petabytes (both decimal and binary).
FAQ
Q: Are the conversions accurate?
A: Yes. All conversions use internationally recognized conversion factors. Results are calculated with JavaScript floating-point precision and displayed with up to 10 significant digits. For temperature, the exact formulas are used (not approximations).
Q: What is the difference between a US gallon and an Imperial gallon?
A: A US gallon equals approximately 3.785 liters, while an Imperial gallon (UK) equals approximately 4.546 liters. This converter uses US customary units by default, which is the standard for most online tools.
Q: How do data storage units work?
A: In decimal (SI) notation, 1 KB = 1,000 bytes, 1 MB = 1,000 KB, etc. In binary (IEC) notation, 1 KiB = 1,024 bytes, 1 MiB = 1,024 KiB, etc. This tool uses decimal (SI) units by default, which is the convention used by storage manufacturers and most operating systems.
Q: Is my data safe?
A: Yes. All calculations happen locally in your browser. No data is sent to any server.