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Hamming Code Calculator

Find the parity bits needed for a Hamming code.

Calculated Output

Parity bits (r) 3

Total code length 7

Formula: Smallest r with 2^r >= m + r + 1

Step-by-Step Breakdown

1. Values used:

2. Data bits (m) = 4

4. Parity bits (r) = 3

5. Total code length = 7

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The math behind it

You need the smallest r where 2^r >= m + r + 1, giving m + r total bits.

4 data bits need 3 parity bits (a 7-bit code, the classic Hamming(7,4)).

What can it correct?

Any single-bit error, and it can detect (not fix) some double-bit errors.