Unit converter
Convert between common units of length, weight, temperature, volume, area, speed, data and time. See all conversions at once.
Free Unit Converter: Length, Weight, Temperature, Volume, Speed and More
Recipes in cups, road signs in miles, packages in pounds and files in gigabytes: everyday life is full of units that don’t match. A unit converter gives instant answers without math. This free unit converter handles length, weight, temperature, volume, area, speed, digital storage and time.
Why you need a unit converter
- You’re cooking, traveling or shopping and the units don’t match.
- Mental math leads to mistakes, especially with temperature.
- Search engines show one answer but not a full table.
- You need several conversions at once.
Common problems when looking for a unit converter
- Many converter sites are cluttered with ads and slow to load.
- Some only support a few categories.
- Results are rounded or unclear.
- Temperature conversions need formulas, not just ratios.
- Data units such as MB and MiB cause confusion.
How this free unit converter solves the problem
- Convert eight categories in one tool.
- See your value in every unit at once, in a table.
- Swap units with one tap.
- Handles Celsius, Fahrenheit and Kelvin correctly.
- Shows both 1,000-based and 1,024-based data units.
- Fast, free and runs in your browser.
Do’s and don’ts of using a unit converter
Do
- Check you’ve selected the right category before converting.
- Use the table to compare several units at once.
- Note that cups, gallons and ounces here follow US sizes.
- Double-check when precision matters, such as in medicine or construction.
Don’t
- Don’t confuse weight ounces with fluid ounces.
- Don’t mix US and UK gallons or pints.
- Don’t assume KB, KiB, MB and MiB are the same size.
- Don’t round too early in multi-step calculations.
Tips for converting everyday units
- For cooking, a kitchen scale in grams is more accurate than cups.
- Remember that 0 °C is 32 °F and 100 °C is 212 °F.
- To estimate kilometers from miles, multiply by about 1.6.
- Storage makers use 1,000-based units while operating systems often show 1,024-based ones.
- Bookmark the tool for travel and recipe days.
Frequently asked questions
Which gallon and cup sizes are used?
Volume units follow US customary sizes. A US gallon is about 3.785 liters.
Why are there two kinds of KB and MB?
KB, MB and GB use 1,000-based units, while KiB, MiB and GiB use 1,024-based units. Both are included so you can pick the one you need.
How accurate is it?
Conversions use exact or standard factors and show up to ten significant digits.
How to use the unit converter
- Pick a category, such as length or weight.
- Type the value you want to convert.
- Choose the unit you are converting from and to.
- Use the table below to see the value in every unit at once.