Unit Converter
Convert length, weight, temperature, volume, area, speed and data. 100% free, no signup. Everything runs in your browser.
This free unit converter handles the seven kinds of conversion people actually need: length, weight, temperature, volume, area, speed and digital storage. Pick a category, type a number, choose your units, and the answer appears instantly along with the same value in every other unit in that category. That last part saves a lot of time, because you often do not know which unit you want until you see the options. Metric and imperial sit side by side, and the area section includes marla and kanal, which matter for property in South Asia and its diaspora and are missing from most international converters. Everything runs in your browser, so it works offline once the page has loaded.
How to use
- Choose what you are converting from the first dropdown, such as length or weight.
- Type your number into the From box and choose its unit underneath.
- Choose the unit you want in the To box. The answer appears immediately.
- Look at the grid below for the same value in every other unit, which is handy when you are comparing options.
- Press Swap to flip the two units around without retyping anything.
- Press Copy result to take the converted number.
Why use our unit converter?
Showing every unit at once is the part that changes how the tool feels. Most converters give you one answer and make you change the dropdown to see another. Here you type 5 kilometers and immediately see it in meters, miles, feet and yards, which is usually what you wanted anyway when you are comparing or sanity checking a figure.
Temperature is handled correctly rather than as a simple multiplication, which is where quick converters get it wrong. Celsius to Fahrenheit needs an offset as well as a scale factor, and Kelvin needs a different offset again. The area section includes marla and kanal alongside acres and hectares, because plenty of people need to convert a property listing and end up doing it by hand. Everything is local and instant. When your figures are settled, the percentage calculator handles any proportion work on top of them, and the date difference calculator covers the calendar side of a project.
Who is this tool for?
Anyone cooking from a foreign recipe converts between cups, milliliters, ounces and grams, which is the single most common everyday use. Travellers convert temperatures, distances and speed limits, because a road sign in miles means very little to someone who thinks in kilometers.
Property buyers and agents in South Asia work in marla and kanal while listings and documents often use square feet or square meters, and getting that wrong is expensive. Students convert units in physics and chemistry homework. Online shoppers check whether a product listed in inches will actually fit a space they measured in centimeters. Developers and IT staff convert data sizes when planning storage or reading a bandwidth quota. Fitness trackers report in one system while gym equipment uses another. Anyone working across two measurement systems reaches for a converter several times a week without thinking about it.
Frequently asked questions
Multiply by 9, divide by 5, then add 32. So 25 Celsius is 25 times 1.8 plus 32, which is 77 Fahrenheit. Temperature is the one category that needs an offset as well as a factor, which is why simple multiplication gives the wrong answer.
It depends on the region, which is exactly why it causes confusion. This converter uses the common standard of 272.25 square feet per marla, with 20 marla to a kanal. Some areas use a 225 square foot marla, so check which one your local documents use.
This converter uses 1024, the binary convention that operating systems and most software use. Storage manufacturers use 1000, which is why a drive sold as 1 TB shows as roughly 931 GB on your computer. Neither is wrong, they are just different definitions.
They are genuinely different measures. A US gallon is about 3.79 liters and a UK gallon is about 4.55 liters, a difference of around 20 percent. Both are listed separately here, and recipes and fuel figures often do not say which one they mean.
Exact conversion factors are used, and results are shown to eight decimal places before rounding. Very large and very small results switch to scientific notation so no precision is lost.
Yes. All the conversion factors are part of the page, so once it has loaded you can turn off your connection and it keeps working. Nothing you type is sent anywhere.