Calculator Inputs
Example Data Table
| Scenario | Cargo (tons) | Laden NM | Voyage Days | Total Cost | Required Rate |
|---|---|---|---|---|---|
| Iron ore haul | 170000 | 5600 | 34.60 | $2,795,000 | $17.84/ton |
| Coal parcel | 78000 | 4300 | 28.15 | $1,526,400 | $21.36/ton |
| Grain shipment | 52000 | 4650 | 31.20 | $1,212,900 | $26.05/ton |
| Minor bulk run | 34000 | 2500 | 19.80 | $702,300 | $24.41/ton |
Formula Used
Sea days
Laden Sea Days = Laden Distance ÷ (Laden Speed × 24) × (1 + Sea Margin %)
Ballast Sea Days = Ballast Distance ÷ (Ballast Speed × 24) × (1 + Sea Margin %)
Port days
Load Days = Cargo Tons ÷ Loading Rate
Discharge Days = Cargo Tons ÷ Discharge Rate
Port Days = Load Days + Discharge Days + Extra Port Days
Bunker use and bunker cost
Sea Bunker = (Laden Sea Days × Laden Bunker Use) + (Ballast Sea Days × Ballast Bunker Use)
Port Bunker = Port Days × Port Bunker Use
Bunker Cost = (Sea Bunker + Port Bunker) × Bunker Price
Voyage cost and freight rate
Hire Cost = Voyage Days × Daily Hire
Direct Port Cost = Load Port Cost + Discharge Port Cost + Canal Dues + Miscellaneous Cost
Subtotal Cost = Hire Cost + Bunker Cost + Direct Port Cost + Contingency
Net Revenue Target = Subtotal Cost × (1 + Target Margin %)
Gross Revenue Needed = Net Revenue Target ÷ (1 - Total Commission %)
Required Freight Rate = Gross Revenue Needed ÷ Cargo Tons
How to Use This Calculator
- Enter cargo quantity, laden distance, ballast distance, and both speed assumptions.
- Add loading and discharge productivity plus extra waiting or port days.
- Provide bunker price and daily consumption values for sea and port conditions.
- Fill in hire, port charges, canal dues, and any miscellaneous operational expense.
- Set commissions, contingency, and the target margin you want to earn.
- Optionally enter a market rate to compare market pricing against your required rate.
- Press Calculate Freight Rate to show the result above the form.
- Use the result buttons to download a CSV file or create a PDF report.
FAQs
1. What does this bulk freight rates calculator estimate?
It estimates required gross freight per ton from voyage days, bunker use, hire, port costs, commissions, contingency, and target margin assumptions.
2. Why include both laden and ballast distance?
Many bulk voyages need a ballast repositioning leg before loading. Including both legs gives a more realistic total sea time and bunker bill.
3. What is sea margin in this tool?
Sea margin adds extra time over theoretical sailing days. It helps cover routing inefficiency, weather, current, speed loss, and ordinary operational uncertainty.
4. Does the rate include commissions?
Yes. The gross freight target is adjusted for brokerage and address commission so the retained revenue still meets your margin objective.
5. Why is contingency useful?
Contingency helps absorb minor unplanned costs such as extra agency fees, bunker deviations, waiting, tugs, or documentation charges.
6. Can I use a market rate for benchmarking?
Yes. Enter an optional market rate to compare the market level with your required rate and see the implied profit impact.
7. Is the output a final charter quote?
No. It is a planning estimate. Final fixture pricing may also depend on laycan, cargo terms, taxes, stevedoring, demurrage exposure, and contract wording.
8. When should I update the assumptions?
Update them whenever bunker prices, port charges, speeds, commissions, or cargo volume changes. Small changes can materially shift required freight levels.