Convert number base values with clear unit labels, full-precision calculations, and a practical reference table.
Use the Number Base Converter
Enter a value, choose the units, and calculate. Your input stays in this browser.
Number Base Converter result
Open the dedicated converter for this measurement
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How to use the Number Base Converter
- Enter the source value.
- Choose the source and destination measurement units or systems.
- Select Calculate and review the result, formula, and reference values.
- Use Swap where available to reverse the selected units.
Worked example
FF in base 16 equals 255 in base 10.
Assumptions and limitations
- Integer input only; fractional base conversion is not included.
- Inputs are limited to 512 digits and bases 2–36.
Frequently asked questions
How accurate is the Number Base Converter?
The calculator uses documented conversion constants and keeps normal browser numeric precision until display rounding.
Are my values stored?
No. The conversion runs in your browser and entered values are not saved.
Why can a converted value be approximate?
Some units depend on a convention or physical conditions. Any such assumption is stated beside the result.