CII calculator › Bulk carrier
Bulk carrier CII calculator
Work out the attained and required Carbon Intensity Indicator (CII) of a bulk carrier and its A–E rating for any year from 2023 to 2030. Capacity for this ship type is deadweight tonnage (DWT), so the CII is in grams of CO₂ per DWT·nautical mile.
Required CII by ship size, 2023–2030
Required CII in g CO₂/(DWT·nm) for example sizes. The required value tightens each year by the reduction factor Z.
| DWT | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 |
|---|---|---|---|---|---|---|---|---|
| Z | 5% | 7% | 9% | 11% | 13.625% | 16.25% | 18.875% | 21.5% |
| 35,000 | 6.72 | 6.58 | 6.44 | 6.30 | 6.11 | 5.93 | 5.74 | 5.56 |
| 58,000 | 4.91 | 4.81 | 4.70 | 4.60 | 4.46 | 4.33 | 4.19 | 4.06 |
| 82,000 | 3.96 | 3.88 | 3.79 | 3.71 | 3.60 | 3.49 | 3.38 | 3.27 |
| 180,000 | 2.43 | 2.38 | 2.33 | 2.27 | 2.21 | 2.14 | 2.07 | 2.01 |
| 300,000 | 1.85 | 1.81 | 1.77 | 1.73 | 1.68 | 1.63 | 1.58 | 1.53 |
Reference line
The 2019 reference value is a × Capacity−c with these parameters from IMO resolution MEPC.353(78), Table 1:
| Size | Capacity used | a | c |
|---|---|---|---|
| Less than 279,000 DWT | DWT | 4745 | 0.622 |
| 279,000 DWT and above | 279,000 (fixed) | 4745 | 0.622 |
Rating boundaries
Each boundary is the required CII multiplied by a factor from MEPC.354(78), Table 1. A ship is rated A up to the superior boundary, B up to the lower, C up to the upper, D up to the inferior, and E above it.
| Size | Superior (A|B) | Lower (B|C) | Upper (C|D) | Inferior (D|E) |
|---|---|---|---|---|
| All sizes | 0.86 | 0.94 | 1.06 | 1.18 |
See how the CII is calculated.