Calculate a System V style checksum from text. The algorithm sums bytes, folds the total into 16 bits, and returns the result.
System V checksums mostly appear in legacy Unix compatibility cases. They are not interchangeable with BSD sum output, CRC-16, or CRC-32.
Some Unix tools print System V checksums as decimal values with block counts. This calculator shows the checksum itself in fixed-width hexadecimal.
The System V checksum returns a 16-bit folded sum, shown here as 4 hexadecimal characters.
Paste text into the input pane. Batch mode calculates one System V checksum per line.
No. It is a byte sum folded into 16 bits, not a polynomial CRC.
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