Unit Converter Online Free
Convert km to miles, kg to lbs, °C to °F, MB to GB & more — free, no signup.
How to Use This Free Unit Converter
Pick a category
Length, weight, temperature, area, volume, data, speed, or time.
Enter a value
Type a number and choose From / To units. Results update live.
Copy or swap
Copy the result, or swap units for the reverse conversion (e.g. miles to km).
Popular conversions
Length converter
km to miles, miles to km, metres to feet, inches to cm, yards, nautical miles.
Weight converter
kg to lbs, lbs to kg, grams, ounces, stone, metric tons.
Temperature converter
Celsius to Fahrenheit, °F to °C, and Kelvin for science use.
Data size converter
MB to GB, GB to TB, plus binary KiB/MiB/GiB for memory-style sizes.
Frequently Asked Questions
Is this unit converter free?
Yes. The Site95 free unit converter online needs no signup, has no watermarks, and has no conversion limits.
How do I convert km to miles?
Open Length, enter a value, set From to Kilometre (km) and To to Mile (mi). The result updates as you type. Swap units to convert miles to km.
How do I convert kg to lbs?
Open Weight, enter kilograms, choose Kilogram (kg) as From and Pound (lb) as To. Use swap for lbs to kg.
How do I convert Celsius to Fahrenheit?
Open Temperature, enter the value, choose Celsius (°C) as From and Fahrenheit (°F) as To. Kelvin is also available.
What units can I convert?
Length, weight/mass, temperature, area, volume, digital data size (MB/GB and MiB/GiB), speed, and time — metric and common US/imperial units.
Is MB to GB using 1000 or 1024?
Both. Use KB/MB/GB/TB for decimal (1000-based) sizes and KiB/MiB/GiB for binary (1024-based) memory-style sizes.
Does my data leave my device?
No. Unit conversion runs entirely in your browser. Site95 never receives the numbers you enter.
Does the unit converter work on mobile?
Yes. It is mobile-friendly for phones and tablets in any modern browser.
Free Online Unit Converter & Unit Conversion Calculator
Use this free unit converter when you need fast, accurate unit conversion without installing an app. Convert km to miles for travel, kg to pounds for recipes or fitness, Celsius to Fahrenheit for weather, and MB to GB for file sizes. Every calculation runs in your browser on Site95.
Length unit converter
Switch between metric and imperial length: millimetres, centimetres, metres, kilometres, inches, feet, yards, miles, and nautical miles. Ideal for maps, construction, sports, and everyday “how many miles is that?” questions.
Weight & mass converter
Convert kilograms, grams, milligrams, metric tons, pounds, ounces, and stone. Useful for shipping estimates, gym logs, and cooking when recipes mix metric and US units.
Temperature converter (°C / °F / K)
Convert between Celsius, Fahrenheit, and Kelvin with live results. Handy for weather, cooking ovens, science homework, and travel.
Volume, area, speed & time
Convert litres and gallons, square metres and acres, km/h and mph, and time from milliseconds to years. One tool covers the conversions people search for most.
Why use Site95
No account, no upload, works on phone and desktop. Pair this converter with our free EMI calculator, percentage calculator, and online calculators.