Unit Converter

Basic Usage

1. Select the type of conversion from the "Conversion Type" dropdown (Length, Weight/Mass, etc.).
2. Enter the numerical value you want to convert in the "Value" field.
3. Select the source unit from the "From" dropdown menu.
4. Select the target unit from the "To" dropdown menu.
5. The conversion result will be displayed automatically.

Supported Unit Categories

• Length: Meters, feet, inches, kilometers, miles, etc.
• Weight/Mass: Kilograms, pounds, grams, ounces, etc.
• Volume: Liters, gallons, cubic meters, fluid ounces, etc.
• Area: Square meters, square feet, acres, hectares, etc.
• Speed: Miles per hour, kilometers per hour, meters per second, etc.
• Pressure: Pascal, PSI, bar, atmospheres, etc.
• Temperature: Celsius, Fahrenheit, Kelvin, etc.
• Time: Seconds, minutes, hours, days, weeks, etc.
• Digital Storage: Bytes, kilobytes, megabytes, gigabytes, etc.
• Data Transfer Rate: Bits per second, bytes per second, etc.
• Energy: Joules, calories, kilowatt-hours, BTUs, etc.
• Frequency: Hertz, kilohertz, megahertz, gigahertz, etc.
• Fuel Economy: Miles per gallon, kilometers per liter, etc.
• Plane Angle: Degrees, radians, gradians, etc.
• Power: Watts, kilowatts, horsepower, etc.
• Torque: Newton meters, pound-feet, etc.
• Electric Current: Amperes, milliamperes, etc.
• Illuminance: Lux, foot-candles, etc.
• Angle (Solid): Steradians, square degrees, etc.
• Data Size Rate: Megabytes per hour, gigabytes per day, etc.
• Dynamic Viscosity: Pascal second, poise, etc.
• Radioactivity: Becquerels, curies, etc.
• Resolution: Pixels per inch, dots per inch, etc.

Input Field

The "Value" field accepts any positive number. For convenience, there are quick value buttons (1, 5, 10, 100) that you can click to quickly set common values.

Unit Selection

The unit dropdowns contain a comprehensive list of units organized by system (Metric, Imperial/US, and others depending on the category). Simply scroll through the list or type to search for the unit you need.

Why are there different unit systems?

Different unit systems evolved independently across cultures and regions. The metric system (SI) was developed in the late 18th century to create a standardized, decimal-based system. The imperial system evolved from traditional English units. Today, the United States is one of the few countries that still primarily uses imperial units, while most of the world has adopted the metric system.

How accurate are the conversions?

The conversions are based on standard, internationally recognized conversion factors and are calculated with high precision. However, displayed results may be rounded for readability. For scientific or highly precise work, always verify the conversion factors being used.

What's the difference between mass and weight?

Mass is a measure of the amount of matter in an object and remains constant regardless of location. Weight is a force that results from gravity acting on mass and varies depending on the gravitational field. On Earth, we often use the terms interchangeably in everyday language, but they are different physical quantities. The converter uses standard Earth gravity for converting between mass and weight units.

Why do some results show in scientific notation?

Very large numbers (like astronomical distances) or very small numbers (like microscopic measurements) are displayed in scientific notation for clarity. For example, 2,500,000,000 meters would be displayed as 2.5 × 10^9 meters.

How do I convert between units not listed in the calculator?

You can perform multi-step conversions using common intermediate units. For example, to convert from a unit A to unit C, you might first convert from A to B, then from B to C. The calculator supports a comprehensive list of units, so this shouldn't be necessary for most standard conversions.