Unit Converter
Convert length, weight, temperature and data size instantly.
About this tool
This unit converter translates everyday units — length, weight, temperature, and data size — between one another within each category. Answer questions like how many kilometers a mile is, how many grams a pound weighs, what Fahrenheit is in Celsius, or how many megabytes make up a gigabyte, simply by typing a number. All calculation happens in your browser, so the values you enter are never sent to a server.
Unit conversion looks like a matter of multiplying by a factor, but it is easy to slip a digit or misremember a coefficient. Foreign recipes, spec sheets, and papers often use units unfamiliar in your region, and looking each one up is tedious. Here, you just pick a category and enter a number to see the related units at once.
Because results update as you type, you can nudge the value up and down to build intuition. Conversions that are not a simple proportion — like temperature, where Celsius and Fahrenheit have different zero points — are handled with the correct formulas, so you avoid the sign and offset mistakes that creep into hand calculations.
Things like currency, whose rates fluctuate daily, are different in nature from unit conversion with fixed factors. This tool covers units that have a physically defined (or conventionally fixed) conversion ratio. Choose the category that fits your task.
How to use
- Choose a category (length, weight, temperature or data size).
- Pick a value and the from/to units to see the result instantly.
- Use “Copy” to copy the result.
FAQ
Are the numbers I enter sent to a server?
No. All conversion is calculated in your browser, so the values you enter never leave your device.
What kinds of units are supported?
Common everyday and work categories such as length, weight, temperature, and data size. Switch categories and convert freely among the units within each.
Is the Celsius–Fahrenheit conversion correct?
Yes. Temperature is not a simple proportion because each unit has a different zero point and scale, but it is computed with the correct formulas.
For data size, is 1 KB 1000 or 1024?
Depending on context there are two systems: decimal (1 KB = 1000 bytes) and binary (1 KiB = 1024 bytes). Check the unit label shown and pick the one that fits your purpose.
Can it convert currency (dollars, yen)?
Currency rates change daily, so they fall outside this tool, which assumes fixed conversion ratios. Use it for physical units like length, weight, temperature, and data size.
Is it accurate with very large numbers?
It is precise enough for typical use. Because of how computers handle floating-point math, extremely large or small values may show a tiny rounding difference.