Convert between units of length, weight, temperature, area, volume, speed, time, data, and energy — instantly.
Unit conversion is essential in everyday life — from cooking and fitness to engineering and science. Different countries use different measurement systems (metric vs. imperial), and having a reliable converter saves time and prevents costly mistakes. CalcDen's unit converter handles all major categories in one place.
The metric system (SI units) is used by most of the world and is based on powers of 10, making conversions straightforward. The imperial system, used primarily in the United States, uses units like inches, pounds, and Fahrenheit. Converting between these systems is one of the most common everyday needs — for example, knowing that 1 mile = 1.60934 km or that 1 kg = 2.20462 lbs.
1 inch = 2.54 centimeters exactly. This is the defined conversion factor between the two systems.
Multiply the Celsius value by 9/5, then add 32. For example, 100°C × 9/5 + 32 = 212°F (boiling point of water).
1 pound = 0.453592 kilograms. Conversely, 1 kilogram = 2.20462 pounds.
1 gigabyte (GB) = 1,024 megabytes (MB) = 1,073,741,824 bytes. Note that storage manufacturers sometimes use 1 GB = 1,000 MB (decimal), while operating systems use the binary definition.