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Numbers Converter

Convert arbitrarily large integer numbers between binary, octal, decimal, hexadecimal, and every base from 2 through 36.

Convert instantly
Enter a value and choose the units. Your answer updates as you type.

Result

1 base 16

Quick reference
  • Binary (base 2)base 2
  • Octal (base 8)base 8
  • Decimal (base 10)base 10
  • Hexadecimal (base 16)base 16
  • Base 36base 36

About the Numbers Converter

Number-base conversion rewrites the same integer using a different set of digits. This tool uses JavaScript BigInt, so it handles integers far beyond ordinary floating-point precision and supports every base from 2 through 36, using 0–9 and A–Z as digits. The arithmetic is exact for whole numbers.

Use binary for bit-level work, hexadecimal for colors and addresses, octal for legacy permissions, or a custom base for encoding exercises—for example, decimal 255 becomes hexadecimal FF. For measurements use a physical unit converter such as Length Converter; for storage quantities use Data Storage Converter, which explicitly handles SI and IEC prefixes.

Frequently asked questions

Which bases are supported?

Any integer base from 2 through 36, including binary, octal, decimal, hexadecimal, and custom bases.

Can it convert very large numbers?

Yes. Whole-number conversion uses BigInt rather than floating-point arithmetic, preserving arbitrary-size integer values.

Are fractional values supported?

No. This converter intentionally handles exact integers; fractional base conversion needs a separate precision policy.

Take this calculation further

Browse the converters calculators collection for more tools in this subject.

For a related calculation, use Data Storage Converter to convert data sizes between bits, bytes, decimal SI kilobytes, and binary IEC KiB, MiB, GiB, TiB, and PiB. Alternatively, use Currency Converter to compare 20 currencies including USD, EUR, GBP, INR, PKR, AED and SAR with static illustrative rates. Not a live exchange-rate quote.

For the underlying method, read Understanding Data Storage Units: Why Your Drive Shows Less Space.