Number Base Converter

Convert numbers between any base (2-36). Enter a number in one base and convert to another.

Value

From Base

To Base

Tab to move between fields

Converted Value

11111111

Decimal Value255

Digit Count8

How to Use This Calculator

Enter Value, From Base, and To Base.
Review the Converted Value result.
Use Decimal Value and Digit Count to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

What each input means

Value: The number to convert (enter digits as if in the source base, using 0-9 only)
From Base: Source number base (2=binary, 8=octal, 10=decimal, 16=hex)
To Base: Target number base

Engine last updated August 5, 2026. Checked against 5 independently-derived tests — how we verify calculators.

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Check if one number divides another. Shows remainder, quotient, and total factor pair count.

Perform modular addition, multiplication, and exponentiation. Calculate (a op b) mod m with equivalence classes.

Convert between binary, octal, decimal, and hexadecimal number systems. Includes bit count, byte size, and ASCII character lookup.

Convert binary, hex, decimal, colors, ASCII, and signed integers.

Convert decimal numbers to binary, hexadecimal, and octal. Essential tool for programming and computer science.