Unit Converter
Convert common units in the browser: length, weight, temperature, area, volume, speed, data size and time. Pick a category, choose the units and get the result immediately.
Free Runs locally No signup
From
To
0.393701in
in = cm × 0.393701How to use it
1
Pick a category
Choose length, weight, temperature, area, volume, speed, data size or time.
2
Choose the units
Select the source and target units, then type the value to convert.
3
Read or copy the result
The result and formula update instantly and can be copied with one click.
Why use this tool
Eight unit categories
Length, weight, temperature, area, volume, speed, data size and time in one tool.
Formula included
Every result shows the exact multiplication factor and offset used.
Dedicated conversion pages
Popular pairs such as cm to inch have their own page with a table and examples.
Frequently asked questions
How accurate is the converter?
It uses standard international conversion factors and displays up to six significant digits. For legal or scientific work, confirm the required precision.
What is the difference between KB and KiB?
KB is 1000 bytes and KiB is 1024 bytes. The converter includes both so you can match the convention your tool uses.
Why does temperature need an offset?
Celsius, Fahrenheit and Kelvin have different zero points, so the conversion multiplies and then adds an offset.
Can I convert the other way?
Yes. Use the swap button, or open the dedicated reverse page linked below the converter.
Are the conversions done locally?
Yes. Everything runs in your browser; no value is sent to a server.
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