Hexadecimal to Decimal
Turn Hexadecimal numbers into Decimal in your browser. Every digit is converted exactly, even for very long values, and nothing is sent to a server.
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Binary
1001010101Octal
1125Decimal
597Hexadecimal
255Spaces and underscores are ignored; 0b, 0o and 0x prefixes are supported.
Common conversions
| Hexadecimal | Decimal |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 4 | 4 |
| 8 | 8 |
| A | 10 |
| 10 | 16 |
| FF | 255 |
Leading zeros are dropped; longer values follow the same digit weights.
Frequently asked questions
How do I convert Hexadecimal to Decimal?
Each Hexadecimal digit is multiplied by its place value, then the total is written using Decimal digits. The table above shows the pattern for small values.
Can I convert fractions?
No. This converter works with unsigned integers only. Convert the integer part first and handle the fraction separately.
How large can the numbers be?
Up to 200 characters, which covers values far beyond 64-bit range. Precision stays exact because the conversion uses big integers.
Related conversions
Decimal to Hexadecimal Hexadecimal to Binary Hexadecimal to Octal Binary to Decimal Decimal to Binary Decimal to Octal
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