Conversion factors
Updated 26 February 2024
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This publication is available at https://www.gov.uk/government/publications/calculate-your-fisheries-catch-limits/conversion-factors
| Species | Code | Gutted | Gutted and headed | Fillets | Parts |
|---|---|---|---|---|---|
| Anglerfish | ANF | 1.22 | 3.0 | 3.0 (1) | |
| Bass | BSS | 1.125 | 2.7 | ||
| Black scabbardfish | BSF | 1.24 | 1.4 (2) | ||
| Blue ling | BLI | 1.17 | 1.32 | 2.8 | |
| Blue whiting | WHB | 1.15 | |||
| Brill | BLL | 1.09 | 2.7 | ||
| Cod | COD | 1.17 | 1.7 | 2.6 | 1.38 (2) |
| Conger eel | COE | 1.125 | 2.7 | ||
| Common dab | DAB | 1.11 | 1.39 | ||
| Common sole | SOL | 1.04 | 2.5 | ||
| Crabs (all species) | 4.0(8) | ||||
| Eastern Atlantic bluefin tuna | BFT | 1.125 | 1.5 | 1.16(9) | |
| Flounder | FLE | 1.08 | 2.7 | 1.39 (3) | |
| Greater forkbeard | GFB | 1.11 | 1.4 | ||
| Greenland halibut | GHL | 1.08 | 1.5 (10) | ||
| Halibut | HAL | 1.08 | 2.7 | ||
| Haddock | HAD | 1.17 | 1.46 | 2.6 | |
| Hake | HKE | 1.11 | 1.4 | 2.6 | |
| Herring | HER | 1.12 | 1.19 | ||
| Horse mackerel | JAX | 1.08 | |||
| Lemon sole | LEM | 1.05 | 2.5 | ||
| Ling | LIN | 1.14 | 1.32 | 2.64 | 2.8 (4) |
| Mackerel | MAC | 1.09 | |||
| Megrim | LEZ | 1.06 | 2.5 | ||
| Mullet | MUL | 1.125 | 2.7 | ||
| Nephrops | NEP | 3.0 (1) | |||
| Plaice | PLE | 1.05 | 1.39 | 2.4 | |
| Pollack | POL | 1.17 | 1.36 | 2.7 | |
| Red mullet | MUR | 1.125 | 2.7 | ||
| Red seabream | SBR | 1.11 | 2.7 | ||
| Redfish | RED | 1.19 | 1.95 (10) | ||
| Roundnose grenadier | RNG | 1.11 | 1.92 | 3.2 (6) | |
| Saithe | POK | 1.19 | 1.44 | 2.9 | |
| Skates and rays (7) | 1.13 | 2.09(5) | |||
| Spurdog | DGS | 1.35 | 2.7 | 2.52(3) | |
| Tope | GAG | 1.125 | |||
| Turbot | TUR | 1.09 | 2.7 | ||
| Tusk | USK | 1.14 | |||
| Whiting | WHG | 1.18 | 1.41 | 2.7 | |
| Witch | WIT | 1.06 | 2.7 |
(1) Tails
(2) Headed
(3) Gutted, headed and skinned
(4) Gutted and salted
(5) Wings
(6) Gutted, headed and tailed
(7) Species specific codes and ID guides are available from your local Marine Management Organisation office
(8) Claws and legs
(9) Guts, gonads and gills removed (ICCAT)
(10) Japanese cut