Number Systems Converter
Convert number representation in one place. Select the units or formats, then enter a value in either box.
This converter includes 16 number representation units or formats. The selectors keep both directions on this page, and the unit descriptions explain definitions and assumptions.
How to use this tool
- Choose the source and destination from the selectors.
- Enter a value in either box. The other box updates automatically.
- Use Swap to reverse the selected systems, or Load example for a valid starting value.
Frequently asked questions
Can I reverse the conversion?
Yes. Edit either value or swap the selectors. Both directions use the same reviewed definitions.
Why can a value show an error?
Each format has its own syntax and range. For example, arbitrary Unicode text cannot always be represented as ASCII. Load example gives a compatible starting input.
How precise is the result?
The selected formats determine what can be represented. Conversion errors are shown separately from the output, so they are not mistaken for encoded text.
Last updated: 2026-10-30