All-in-One Unit Converter
Converting between units should not require searching for conversion tables or doing mental math. Our free unit converter covers five essential categories — length, weight, temperature, cooking volume, and data size — with instant, accurate results as you type. Whether you are following a recipe written in metric, checking luggage weight limits, or converting file sizes for a tech project, this tool handles it in one place.
Select a category, choose your source and target units, enter a value, and the converted result appears immediately. All conversions use standard internationally recognized factors and run entirely in your browser — no sign-up, no data sent to any server, and completely free to use whenever you need a quick conversion.
How to Use the Unit Converter
Start by selecting a category using the buttons at the top: Length, Weight / Mass, Temperature, Cooking Volume, or Data Size. Choose the unit you are converting from in the "From" dropdown and enter your value. Select the target unit in the "To" dropdown — the converted result appears instantly in the output field below. Switch categories at any time to convert different types of measurements. No button to click — results update in real time as you change values or units.
Who Uses a Unit Converter?
- Home cooks and bakers convert recipe measurements between metric and US customary units.
- Travelers convert distances, temperatures, and weights when visiting countries with different measurement systems.
- Engineers and students switch between metric and imperial units for science, construction, and homework.
- IT professionals convert data sizes between bits, bytes, kilobytes, megabytes, and beyond.
- Fitness enthusiasts track body weight in pounds or kilograms and measure distances in miles or kilometers.
Key Features
- Five categories: length, weight, temperature, cooking volume, and data size
- Length units: mm, cm, m, km, in, ft, yd, mi
- Weight units: mg, g, kg, tonnes, oz, lb
- Temperature: Celsius, Fahrenheit, and Kelvin
- Real-time conversion with up to 10 significant figures — runs entirely in your browser
Tips for Getting the Most From This Tool
When following recipes, note that US and UK cup measurements can differ slightly — this tool uses US customary cooking volumes. For temperature, remember that negative Celsius values are common in cold climates while Fahrenheit is standard in the US. When converting data sizes, be aware that some storage manufacturers use decimal (1 GB = 1,000 MB) while operating systems often use binary (1 GiB = 1,024 MiB) — this converter uses the decimal convention common in networking and storage marketing. Double-check critical measurements like medication dosages or engineering tolerances with a second source.
Frequently Asked Questions
How accurate are the conversions?
All conversions use standard internationally recognized conversion factors. Results are displayed to up to 10 significant figures to minimize rounding errors. For everyday use, cooking, and general reference, the accuracy is more than sufficient.
Why does temperature conversion work differently?
Unlike length or weight, temperature scales have different zero points. Converting between Celsius and Fahrenheit requires both multiplication and an offset — for example, 0°C equals 32°F, not 0°F. The calculator handles these offset conversions automatically.
What cooking volume units are supported?
The cooking category includes milliliters, liters, teaspoons, tablespoons, cups, fluid ounces, pints, quarts, and gallons. These use US customary definitions, which are the standard for most American recipes and cooking websites.
Does the data size converter use binary or decimal?
This converter uses decimal (SI) prefixes where 1 KB = 1,000 bytes, 1 MB = 1,000,000 bytes, and so on. This matches how storage manufacturers and network speeds are typically labeled. Operating systems that show binary sizes (1 KiB = 1,024 bytes) will display slightly different numbers.
Can I convert between different categories?
No. Each category converts within its own unit system — you cannot convert meters to kilograms, for example. Switch categories using the buttons at the top to convert different types of measurements.
Is my data stored anywhere?
No. All conversions run locally in your browser. The values you enter are never uploaded to a server, stored in a database, or shared with any third party.