Unit Converter
Convert between dozens of units across length, weight, temperature, area, volume, speed, and time. Instant conversion.
Convert Any Unit Instantly
Whether you're converting kilometers to miles for a road trip, Celsius to Fahrenheit for a recipe, or square meters to acres for a property listing, this converter handles it. Seven categories, dozens of units, all in your browser with zero network requests.
Supported Categories
- Length — m, km, cm, mm, mile, yard, foot, inch
- Weight — kg, g, mg, metric ton, pound, ounce
- Temperature — Celsius, Fahrenheit, Kelvin
- Area — m², km², hectare, acre, ft², in²
- Volume — liter, mL, m³, gallon, quart, cup, fl oz
- Speed — m/s, km/h, mph, knot
- Time — second, minute, hour, day, week, month, year
Related: Percentage Calculator, Mortgage Calculator.
FAQ
Is this tool free to use?
Yes. The tool is free to use in your browser and does not require an account.
Do I need to install anything?
No. The workflow runs in a normal modern browser, so you can use it on desktop or mobile without installing extra software.
Is my input uploaded to a server?
No. All processing happens locally in your browser. Your data never leaves your device.
Can I use this for business or client work?
Yes, but you should still verify important results and keep source files when the work affects billing, legal, or operational decisions.
Why does the result look different from another tool?
Different tools may use different defaults, settings, or algorithms. Check the options and compare with your target requirements.
What should I check before using the result?
Review the output for accuracy, formatting, compatibility, and any platform-specific requirements before submitting or publishing.