FLOERK calculation tools
RFID · Technical calculators
Calculate and validate Gen2 PC words, CRC-16 and CRC-5, bit/byte/word addresses and Lock payloads locally.
Encoding & settings
01 · GS1 identifier
Edit individual EPC components
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02 · EPC Pure Identity URI
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03 · EPC Tag URI
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04 · EPC memory contents · Hex
Binary
GS1 data elements
User Memory · Hex
TID · Hex
GS1 check digit
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GS1 element string
Use (AI)value notation. Variable fields are separated by ASCII GS in the raw value. Supported AIs match the User Memory selection.PC word · encoder / decoder
PC describes EPC length and control bits. Toggle 0 uses attributes, Toggle 1 uses AFI in the lower 8 bits. UMI/XI may be calculated by the tag.Memory addresses · bit / byte / word
Gen2 · CRC
MSB first. CRC-16: polynomial 0x1021, initial 0xFFFF, inverted result. CRC-5: polynomial 0x09, initial 0x09. StoredCRC uses PC + EPC; other packet types require their respective data bits.Lock bits · 20-bit payload
Command calculation only; no tag read/write. Permanent locking and permanent unlocking are irreversible. This payload is not a complete reader command.NDEF Encoder / Decoder
Encoded message · hex
UID · representation & byte order
A UID alone does not reliably identify the manufacturer or chip model.Hex ↔ Binary ↔ Decimal
Technical calculations for UHF RFID Gen2
PC control bits and 16-bit word lengths are represented separately from the EPC identity. Address conversion includes byte and word addresses with remaining bit positions. Gen2 checksums use defined polynomial and initial values. Lock calculation encodes and decodes command masks and actions; it does not establish an existing tag lock state. No reader or writer connection is used.
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