Number Base Calculator

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Introduction

Number Base Calculator — Convert numbers between different number bases. Enter Number, From base, To base to get an instant, accurate result.

Formula

Converts a number between any two bases from 2 to 36 by first parsing it in the source base to a decimal integer, then re-expressing that decimal value in the target base.

Step-by-step

Enter the Number.
Enter the From base.
Enter the To base.
Click Calculate to see your result instantly.

Real-world example

Example: With Number = FF, From base = 16, To base = 10, the Number Base Calculator gives Decimal: 255, Converted: 255.

Frequently Asked Questions

What bases are supported?

Any base from 2 (binary) to 36, which uses digits 0–9 and letters A–Z.

Is the output case-sensitive?

Letter digits in the result are shown in uppercase.

What inputs does the Number Base Calculator need?

You'll need to provide: Number, From base, To base. All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.

How accurate is the Number Base Calculator?

The Number Base Calculator applies the formula exactly as calculated — Converts a number between any two bases from 2 to 36 by first parsing it in the source base to a decimal integer, then re-expressing that decimal value in the target base. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the Number Base Calculator free to use?

Yes, the Number Base Calculator is completely free, requires no signup, and runs instantly in your browser.

About the Number Base Calculator

The Number Base Calculator uses a real, verifiable formula — Converts a number between any two bases from 2 to 36 by first parsing it in the source base to a decimal integer, then re-expressing that decimal value in the target base. — so results are accurate every time, not an approximation.

Amortization schedule

Growth over time