Work across measurement systems
Convert a length or mass when a specification uses different units from your working notes. Select the measurement type first, then confirm both source and destination units before entering the number.
Unit converter
Convert length, mass, temperature, and data units.
- ✓ Length and mass conversions
- ✓ Temperature with offsets
- ✓ Decimal and binary data units
Processed on your device
Translate a measurement while keeping the units clear
Switch between common units without looking up conversion factors. Select a measurement type, then your starting and target units.
Clarify a data-size figure
Compare decimal storage units with binary units rather than assuming they use the same factors. KB, MB, and GB use powers of 1,000 here; KiB, MiB, and GiB use powers of 1,024.
Get the best result
KB, MB, and GB use decimal factors of 1,000. KiB, MiB, and GiB use binary factors of 1,024. Temperature conversion accounts for offsets.
A practical example
Starting point
1 inch converted to centimeters.
Expected result
2.54 cm.
The source and destination factors are applied within one measurement type. Temperature conversions additionally account for differences in scale offsets.
Troubleshooting and useful checks
The units I need are not listed
Check the selected measurement type. The current page covers the listed length, mass, temperature, and data-size units; it is not a universal converter for area, volume, speed, or every specialized unit.
A temperature is rejected
The tool rejects values below absolute zero after conversion to Celsius. Check whether the selected source scale matches the value you intended.
Frequently asked questions
A little clarity before you get started.
Can I convert negative temperatures?
Yes. Negative values are supported for all temperature scales.
What is the difference between MB and MiB?
An MB is 1,000,000 bytes in this tool. A MiB is 1,048,576 bytes. The different decimal and binary factors explain why those labels should not be used interchangeably.
Can I convert between unrelated measurement types?
No. A length cannot be converted directly to mass or temperature. Choose source and destination units from the same measurement type.
Are displayed results exact?
The calculation uses JavaScript floating-point numbers and displays up to 12 significant digits. Some factors are exact definitions, but displayed values can still be rounded.
Can I enter negative values?
The numeric field accepts negative values. Negative temperatures are supported above absolute zero. Interpret negative lengths or masses according to your own mathematical context rather than treating them as physical quantities.
Do I need an account to use this tool?
No. This tool is free to use without signing in. An account lets you keep a list of favorite tools.
Can I use this on a phone?
Yes, with a current browser. File support, download behavior, and available memory vary by device. For large documents and images, a computer is often more comfortable.