Binary Decoder
Convert binary to decimal numbers (sign in to earn points)!
Difficulty
Binary to Decimal Conversion
Convert binary numbers (0s and 1s) to decimal numbers. Each position has a value based on powers of 2.
Position Values
| 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 |
| 2⁷ | 2⁶ | 2⁵ | 2⁴ | 2³ | 2² | 2¹ | 2⁰ |
Example: 01001010 = 74
0
1
0
0
1
0
1
0
×128
×64
×32
×16
×8
×4
×2
×1
0
64
0
0
8
0
2
0
64 + 8 + 2 = 74
Quick Reference
00000001 = 1
00000010 = 2
00001010 = 10
00010100 = 20
00110010 = 50
01100100 = 100
10000000 = 128
11111111 = 255
Tip:
Only add the position values where you see a 1. Positions with 0 contribute nothing to the total!
Congratulations!
You've completed all binary challenges!
Check back later for more challenges.
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How to Play
- • Each challenge shows a binary message (groups of 0s and 1s)
- • Convert each 8-digit binary number to its ASCII character
- • Type the decoded message and submit your answer
- • Earn points for each correct answer!
- • Difficulty levels: Easy, Medium, Hard