BINARY to DECIMAL Converter

Convert binary to decimal instantly. Enter a value and get the exact decimal representation.

BINARY value

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Binary to Decimal Chart (8-bit)

Each bit position in an 8-bit binary number has a fixed place value. Add up the place values of every bit set to 1 to get the decimal number:

Bit position	Place value	Decimal value
7	128	128
6	64	64
5	32	32
4	16	16
3	8	8
2	4	4
1	2	2
0	1	1
—	—	—
0	00000000	0
5	00000101	5
10	00001010	10
15	00001111	15
32	00100000	32
64	01000000	64
100	01100100	100
127	01111111	127
128	10000000	128
200	11001000	200
255	11111111	255

Common 8-bit values, an 8-bit binary number can represent 0 to 255 (2⁸ − 1):

Binary	Decimal
00000000	0
00000101	5
00001010	10
00001111	15
00100000	32
01000000	64
01100100	100
01111111	127
10000000	128
11001000	200
11111111	255

How to convert binary to decimal step by step

Example: 101010 → decimal
1. Write the place values above each bit, right to left: 32, 16, 8, 4, 2, 1.
2. Multiply each bit by its place value: 1×32, 0×16, 1×8, 0×4, 1×2, 0×1.
3. Add the results: 32 + 8 + 2 = 42.
So binary 101010 = decimal 42.

Popular binary values converted

Step-by-step decimal conversions for the most searched binary numbers:

101 1111 1010 11010 100 11011

How it works

Value in binary is parsed, then re-expressed in base 10 (decimal).

Examples

Input	Output
1010	255

Frequently Asked Questions

How do I convert binary to decimal?

Repeatedly divide by 10 collecting remainders, or just use this tool, parsing and conversion happen instantly in your browser.

Are lowercase digits accepted?

Yes, both upper and lower case digits are parsed correctly.

Is any data uploaded?

No. Conversion runs entirely in your browser.