Charter Rate Calculator
Understand how vessel charter rates are calculated and use our interactive calculator to estimate freight costs for West Africa routes. Learn about Worldscale, flat rates, and time charter pricing.
Last updated: 25 August 2026 | Analysis by Calmwaters Shipping team
Interactive Charter Rate Calculator
Transit Time
34.2 days
Total Fuel
2,224.702 tonnes
Fuel Cost
$1,223,586.31
Flat Freight
$560,000
Actual Freight
$476,000
Total Voyage Cost
$1,473,586.31
TCE (per day)
$-29,147
Cost per Barrel
$21.81
Route Details
Understanding Charter Rates
Voyage Charter
Vessel hired for a specific voyage from loading to discharging port. Shipowner provides crew and pays operating costs.
Rate: Per tonne or lump sum
Includes: All voyage costs
Example: Bonny → Rotterdam
Time Charter
Vessel hired for a fixed period. Charterer pays daily hire and covers fuel/port costs.
Rate: USD per day
Excludes: Fuel, port charges
Example: 6-month PSV hire
Bareboat Charter
Vessel hired without crew. Charterer assumes full operational control.
Rate: USD per day
Excludes: Crew, insurance, maintenance
Example: Long-term vessel hire
Worldscale Rate System
Worldscale is the standardised rate system used for tanker freight calculations. Each route has a flat rate based on distance and typical voyage costs. Actual freight rates are expressed as a percentage of this flat rate.
WS 100
Freight rate equals the flat rate
WS 120
Freight rate is 120% of flat rate
WS 80
Freight rate is 80% of flat rate
| Route | Distance | Flat Rate (WS) | Typical Rate |
|---|---|---|---|
| Bonny → Far East | 11,500 nm | $3.50/tonne | WS 45-65 |
| Bonny → Rotterdam | 4,700 nm | $1.50/tonne | WS 70-100 |
| Bonny → Mediterranean | 3,800 nm | $1.20/tonne | WS 80-120 |
| Bonny → US Gulf | 5,800 nm | $1.80/tonne | WS 65-95 |
| Forcados → Rotterdam | 4,400 nm | $1.40/tonne | WS 70-100 |
Factors Affecting Charter Rates
Supply & Demand
- • Number of available vessels in market
- • Cargo volumes and trade flows
- • OPEC+ production decisions
- • Seasonal demand patterns
- • New vessel deliveries vs scrapping
Operational Factors
- • Port congestion and waiting times
- • Weather conditions
- • Fuel prices (bunker costs)
- • Security situation (piracy risk)
- • Canal transit fees (Suez, Panama)
West Africa Specific
- • Dangote Refinery production levels
- • Nigerian crude oil exports
- • Gulf of Guinea security premiums
- • Regional product imports
- • AfCFTA trade flow changes
Market Conditions
- • Global economic growth
- • Energy transition policies
- • sanctions and trade restrictions
- • Currency exchange rates
- • Insurance costs
Current Market Indicators
VLCC Market
Suezmax Market
Aframax Market
Frequently Asked Questions
How are vessel charter rates calculated?
Charter rates are calculated based on vessel type, cargo size, route distance, and market conditions. For voyage charters: Freight = Distance × Rate × Cargo. For time charters: Hire = Daily Rate × Number of Days. Worldscale rates use a standardised system where actual rates are expressed as a percentage of the flat rate.
What is Worldscale?
Worldscale is a standardised rate system for tanker freight calculations. Each route has a flat rate based on distance and typical voyage costs. Actual freight rates are expressed as a percentage: WS 100 = flat rate, WS 120 = 120% of flat rate. Updated annually by Worldscale Association.
What are current tanker rates for West Africa routes?
Current tanker rates vary by vessel class and market conditions: VLCC Bonny-Far East: WS 45-65 (~$1.5-2.5M/day); Suezmax Bonny-Europe: WS 70-100 (~$25,000-40,000/day); Aframax Bonny-Med: WS 90-130 (~$18,000-30,000/day). Rates fluctuate based on OPEC+ production, seasonal demand, and geopolitical factors.
What factors affect charter rates?
Key factors include: vessel supply and demand, oil production levels (OPEC+), route distance, port congestion, weather conditions, security situation (Gulf of Guinea piracy), fuel prices, and seasonal demand. Dangote Refinery operations have significantly impacted West African tanker markets.
What is the difference between voyage and time charter rates?
Voyage charter rates are per-tonne or per-voyage charges covering the entire voyage from loading to discharge. Time charter rates are daily hire charges for vessel use over a period. Voyage rates include all voyage costs; time charter rates exclude fuel and port charges (paid by charterer).
Need a Custom Rate Quote?
The calculator provides estimates based on market averages. For accurate quotes tailored to your specific cargo, route, and timeline, contact our team. We have access to real-time market data and can negotiate competitive rates on your behalf.
Contact us at info@westafricacharter.com or call +234 916 333 1144