Even Parity Bit Calculator
Calculate even parity bits for error detection in binary data transmission
Calculate Even Parity Bit
Example: 1010110, 11001, 101
Position 1 = beginning, 1 = end. Leave empty for end position.
Example Calculations
Example 1: Generate Mode
Input: 1010110
Count of 1s: 1 + 1 + 1 + 1 = 4 (even)
Parity bit: 4 mod 2 = 0
Result: 10101100
Example 2: Generate Mode
Input: 1001011
Count of 1s: 1 + 1 + 1 + 1 = 4 (even)
Parity bit: 4 mod 2 = 0
Result: 10010110
Example 3: Check Mode
Input: 10101101
Count of 1s: 1 + 1 + 1 + 1 + 1 = 5 (odd)
Result: Invalid even parity (error detected)
Even Parity Rules
Calculator Modes
Generate Mode
Calculates parity bit for your binary message and creates the encoded message with parity.
Check Mode
Verifies if a received message has correct even parity to detect transmission errors.
Understanding Even Parity Bits
What is Even Parity?
Even parity is a simple error detection method used in digital communications. A parity bit is added to binary data to make the total number of 1s in the message even. This allows the receiver to detect if a single bit error occurred during transmission.
How It Works
- •Count the number of 1s in the original data
- •If count is even, add parity bit 0
- •If count is odd, add parity bit 1
- •Final message always has even number of 1s
Error Detection
No Error
If the received message has an even number of 1s, it's likely the transmission was successful.
Error Detected
If the received message has an odd number of 1s, a single-bit error likely occurred during transmission.
Limitations
Even parity can detect single-bit errors but cannot detect even numbers of bit errors (2, 4, 6, etc.).
Applications
- • Serial communication protocols (UART, RS-232)
- • Memory systems (RAM, cache)
- • Network protocols and data transmission
- • Storage systems and data integrity checking
- • Simple error detection in embedded systems