Number System Converters

Number System Converters

15 free tools for Binary, Decimal, Hex, Octal, and more conversions

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Binary to Decimal
Binary to Hex
Binary to Octal
Decimal to Binary
Decimal to Hex
Decimal to Octal
Hex to Binary
Hex to Decimal
Octal to Binary
Octal to Decimal
Roman Numerals
Radians to Degrees
PPM Converter
Fraction Converter
Base Converter
15 Free Tools 100% Private No Signup

Whether you're a CS student learning number systems or a developer working with binary data and hex color codes — CodBolt's 15 free converters have you covered. Convert between Binary, Decimal, Hex, and Octal in one click, decode Roman Numerals, convert Radians to Degrees, work with fractions, PPM values, and any custom base. Fast, accurate, and always free.

Frequently Asked Questions

Use CodBolt's free Binary to Decimal converter. Enter your binary number and instantly get the decimal equivalent. No signup required.
Hexadecimal (base-16) uses digits 0-9 and letters A-F. It is widely used in programming, color codes (#FF5733), memory addresses, and low-level computing.
Use the Decimal to Binary tool. Enter any decimal number and instantly get the binary representation. The tool also shows the step-by-step conversion process.
Yes, all 15 number system converter tools are completely free — no account, no limits. Enter your number and get the result instantly.