Algebra and number tools

Number-base converter calculator

Supports bases 2–36 and signed integers using exact BigInt arithmetic.

Your numbers

Use the units shown. Results update as you change valid inputs.

YOUR RESULT

Supports bases 2–36 and signed integers using exact BigInt arithmetic.

THE NUMBERS, EXPLAINED

How to use this calculator.

Supports bases 2–36 and signed integers using exact BigInt arithmetic.

Start with your inputs

Enter integer text, source base, target base. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.

InputExample value
Integer textFF
Source base16
Target base10

A worked example

With the example inputs above, converted integer is 255. Change the inputs to explore your own scenario.

All results for the example inputs above
ResultExample answer
Converted integer255

How this is calculated

Converted integer

convertBase(a,b,c)

Symbols and units
a
Integer text
b
Source base
c
Target base

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Calculation steps and notation

Read the source digits from left to right: value = previous value × source base + next digit. Use exact integer arithmetic, then express that integer in the target base, preserving its sign.

Assumptions and limits

Supports bases 2–36 and signed integers using exact BigInt arithmetic.

Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.

Questions about this tool

What does the result tell me?

Converted integer. The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.

Why might another calculator differ?

Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Supports bases 2–36 and signed integers using exact BigInt arithmetic.

Are my inputs stored or sent to AI?

Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.

Further reading

OpenStax: College Algebra ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

Review status

Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.

Read the quality report →