Technology & Computing
Hamming Code SECDED Parity Bits Calculator
Calculate the number of parity bits and total codeword size needed to add single-error-correction, double-error-detection to a data block.
Your inputs
Change any value to update the result instantly.
Parity bits required (SECDED)
8
Total codeword size
72 bits
Overhead
12.5%
Hamming-only parity bits
7
SECDED adds one extra overall parity bit to plain Hamming code, enabling detection (not correction) of double-bit errors.
Formula and working
Find minimum r such that 2^r ≥ dataBits + r + 1; total bits = dataBits + r + 1 (extra bit for SECDED)
- 1
Collect the inputs
Data bits to protect = 64
- 2
Apply the formula
Find minimum r such that 2^r ≥ dataBits + r + 1; total bits = dataBits + r + 1 (extra bit for SECDED)
- 3
Result
Parity bits required (SECDED) = 8
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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