Math

One's Complement Calculator

Bitwise NOT (flip all bits).

Calculated Output

One's complement (decimal) 213

Binary 11010101

Step-by-Step Breakdown

1. Values used:

2. Decimal = 42

3. Bits = 8

4. One's complement (decimal) = 213

5. Binary = 11010101

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Frequently Asked Questions

Two's complement?

One's + 1 = two's complement.