Parity Bit Calculator
Find the even and odd parity bits for a run of bits.
Simple error checking
A parity bit is the most basic error check there is: one extra bit that makes the number of 1s in a byte even or odd. If a single bit flips in transit, the parity no longer matches and the error is caught.
The bits 1011001 contain four 1s — already even — so the even parity bit is 0 and the odd parity bit is 1. The tool reports the 1-count and both parity bits at once.
Instant and private
The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What is a parity bit?
An extra bit added to make the total number of 1 bits either even or odd, used as a simple error check.
What is the difference?
Even parity makes the count of 1s even; odd parity makes it odd. The tool shows both.
What input does it take?
A string of bits, like 1011001. Spaces are ignored.
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