Unit Converter — Free Online Tool
Convert length, weight, temperature and more
How to use this tool
- [01]Choose a measurement category — length, weight, temperature, volume, area, speed, or digital storage.
- [02]Select your starting unit and enter the value you want to convert.
- [03]Pick the target unit to see the converted value instantly, or switch categories without losing your place.
About this Unit Converter
The Unit Converter handles length, weight, temperature, volume, area, speed, and digital storage, converting between metric and imperial systems (and between units within the same system, like feet to miles) using exact conversion factors rather than rounded approximations. Temperature is the one category that needs a formula rather than a multiplier — the tool applies the correct Celsius/Fahrenheit/Kelvin conversion rather than treating it like a linear unit.
Because everyday unit mix-ups — a recipe in cups when your measuring set is metric, a car's fuel economy in mpg when you're used to L/100km, a package weight in kg for a form that wants pounds — span so many different categories, having length, weight, volume, and the rest in one tool avoids bouncing between separate single-purpose converters for each type of measurement.
Precision is preserved to several decimal places rather than rounding aggressively, which matters for categories like digital storage where the difference between a decimal gigabyte (1000³ bytes) and a binary gibibyte (1024³ bytes) is large enough to matter for anyone checking a drive's actual capacity against its advertised size.
All conversion happens instantly as you type, entirely in your browser, with no data sent anywhere.
Our Unit Converter is completely free to use with no signup required. For this tool, processing runs in your browser — your files and data stay on your device and are not uploaded to our servers.
Whether you are a developer, designer, student, or business owner, this tool is designed to save you time and make your workflow more efficient. Bookmark this page to access it whenever you need it — it will always be free.
Frequently asked questions
Is the Unit Converter completely free?
Yes, the Unit Converter is 100% free to use with no hidden charges, no subscription, and no signup required. Simply visit the page and start using it immediately.
Does this tool upload my files to a server?
No. Everything runs entirely in your browser using JavaScript. Your files, text, and data never leave your device and are never sent to our servers. This makes it completely private and secure.
Does the Unit Converter work on mobile?
Yes, the Unit Converter is fully responsive and works on all devices including smartphones, tablets, and desktop computers. It works on Chrome, Firefox, Safari, and Edge browsers.
How accurate is this tool?
Our Unit Converter uses industry-standard algorithms to ensure accurate results every time. It has been tested extensively across different browsers and devices to ensure consistent and reliable output.
Why does digital storage show two slightly different answers for the same conversion?
Storage can be measured in decimal units (1 GB = 1000³ bytes, used by manufacturers) or binary units (1 GiB = 1024³ bytes, used by operating systems) — the two aren’t the same number, which is why an advertised drive size and what your OS reports don’t match exactly.
Is temperature conversion just a simple multiplier like the other units?
No — Celsius, Fahrenheit, and Kelvin require an offset as well as a scale factor, so the tool applies the actual conversion formula rather than a flat multiplier used for units like length or weight.
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