How to Convert Units (Length, Weight, Temperature & More)
A good unit converter saves you from second-guessing recipes, luggage limits, and download sizes. Kitolity’s Unit Converter handles the everyday categories — length, mass (weight), temperature, data, time, speed, area and volume — and it runs entirely in your browser, so the numbers you type never leave your device.
The tool
Unit Converter
Step by step
- Pick a categoryChoose what you’re converting — length, mass, temperature, data, time, speed, area or volume. Each category shows only the units that belong to it, so you won’t accidentally mix kilograms with kilometres.
- Choose your From and To unitsSet the unit you’re starting with (From) and the unit you want (To). For example, pick centimetres → inches, or kilograms → pounds. A Swap button flips the two whenever you need to go the other way.
- Enter your valueType the number you want to convert. The result updates as you type — there’s no separate “Convert” button to hunt for.
- Copy the resultWhen the converted value looks right, copy it with one tap and paste it into your recipe, spreadsheet, or booking form.
Which conversions it covers
The converter spans the categories most people actually need day to day: length (mm, cm, m, km, inches, feet, miles), mass or weight (grams, kilograms, ounces, pounds), temperature (Celsius, Fahrenheit, Kelvin), data (KB, MB, GB, TB), time, speed, area and volume.
Because each category keeps its own list of units, you always compare like with like — you can move between metric and imperial within a category without picking an option that doesn’t make sense.
Why temperature is special
Most conversions are just multiplication — a mile is always a fixed number of kilometres. Temperature isn’t, because the Celsius, Fahrenheit and Kelvin scales don’t share the same zero point. Multiplying by a single factor would give you the wrong answer.
That’s why the tool uses the real formulas instead. They line up exactly where they should: 100°C equals 212°F equals 373.15K, and 0°C equals 32°F. Whether you’re reading an oven dial or a weather app abroad, the conversion stays accurate across the whole range.
Why data sizes use 1024
For data, the converter steps in multiples of 1024 rather than 1000 — so 1 GB is 1024 MB, and 1 MB is 1024 KB. This matches how most operating systems report file and drive sizes on screen.
Using 1024 means the numbers you see here line up with what your computer or phone shows, which is what you usually want when you’re checking whether a download will fit or how much space a folder takes.
Everyday things it’s good for
Reach for it when a recipe is in grams and your scale is in ounces, when you’re packing to a strict luggage weight, or when a package’s dimensions are listed in inches but the courier wants centimetres.
It’s just as handy for travel and tech: reading speed limits in km/h when you drive in miles, sizing up a download in MB versus GB, or converting square metres to square feet when you’re comparing apartments.
Private by design
The whole conversion happens locally in your browser. Nothing you type is uploaded, stored, or sent to a server — the math runs on your device and the result appears instantly.
That makes it quick and safe to use for anything, from casual kitchen maths to numbers you’d rather not paste into a random website.
Frequently asked questions
Is anything I type uploaded?
No. The converter runs entirely in your browser, so the values you enter never leave your device — nothing is uploaded or stored.
How does it convert temperature?
It uses the proper Celsius, Fahrenheit and Kelvin formulas, not a single multiplier. That’s why 100°C correctly equals 212°F and 373.15K, and 0°C equals 32°F.
Why is 1 GB shown as 1024 MB instead of 1000?
Data sizes step in multiples of 1024 (KB, MB, GB, TB) to match how most operating systems report file and drive sizes, so the numbers line up with what your device shows.
Can I quickly convert the other way?
Yes. Use the Swap button to flip your From and To units — for example, switching kg → lb into lb → kg — without re-selecting anything.