Read from right to left
The rightmost bit is worth 2⁰, then 2¹, 2², 2³, and so on.
Settings
Tune the conversion
Input format
Result options
Converter Engine
Binary input
Decimal result
Clean binary
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Highest power
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Status
Waiting
Place-value party
Conversion steps
Enter a binary number to see each active bit multiply by its power of two.
Tiny lesson
Why binary becomes decimal
Keep the 1s
A 1 means “add this power of two.” A 0 means “skip it.”
Add the values
For 1011, add 8 + 0 + 2 + 1 to get decimal 11.