🛢️ Fuel & Bunker Calculator
Professional fuel & bunker calculation tools. Verify bunker fuel deliveries, correct temperature errors, and calculate true fuel weight according to industry standards.
🌡️ Fuel Oil Density Temperature Correction
Convert fuel density between different temperatures using industry-standard correction factors. Essential for accurate bunker quantity verification during bunkering operations.
⚡ Quick Presets
🔄 Calculation Mode
📊 Input Data
⚙️ Correction Factor
Ready for Calculation
Enter density and temperature values to calculate temperature-corrected density.
⚙️ How to Use
📌 When to Use
- During bunker fuel delivery to verify BDN density
- When fuel temperature differs from 15°C standard
- For accurate fuel quantity calculations
- Before cargo/fuel transfer operations
🔧 How to Use
- Step 1: Select calculation mode (To 15°C or To Target Temp)
- Step 2: Choose fuel grade preset or enter custom values
- Step 3: Input observed density and temperature
- Step 4: Select correction factor (HFO/MDO/Custom)
- Step 5: Click Calculate to get corrected density
📝 Note
Important: Correction factors vary by fuel type. HFO uses 0.00064, MDO/MGO uses 0.00065. Always verify with fuel supplier's certificate.
💡 Example
Scenario: IFO380 bunker delivery
- • Observed density: 985 kg/m³
- • Observed temp: 30°C
- • Correction factor: 0.00064 (HFO)
- • Result: Density@15°C = 975.5440 kg/m³
🛢️ Bunker Quantity Calculator
Calculate precise bunker weight in Metric Tonnes from tank volumes. Includes automatic temperature correction and supports multiple tanks for complete BDN verification.
🚢 Vessel Details (Optional)
⚙️ Fuel Specification
📏 Volume Unit
🏢 Tanks
Ready for Calculation
Enter tank volumes and fuel specifications to calculate total bunker quantity in MT.
⚙️ How to Use
📌 When to Use
- Verify bunker delivery note (BDN) quantities
- Calculate total fuel received from multiple tanks
- Cross-check supplier's declared weight
- Prepare bunker survey reports
🔧 How to Use
- Step 1: Enter vessel name and bunker date (optional)
- Step 2: Input fuel density at 15°C from BDN
- Step 3: Enter observed fuel temperature
- Step 4: Select volume unit (m³ or liters)
- Step 5: Add tanks and enter volumes
- Step 6: Calculate and export PDF/CSV
📝 Note
Important: This calculator uses ASTM 54B for VCF and ASTM 56 for WCF. Results are in metric tonnes (MT) for air weight, matching BDN standards.
💡 Example
Scenario: VLSFO bunker delivery
- • 3 tanks: 50, 75, 100 m³
- • Density@15°C: 980 kg/m³
- • Observed temp: 25°C
- • Result: ~218.7 MT total weight
📊 ASTM Table Integration
Professional-grade VCF and WCF calculations using ASTM 54A, 54B, and 56 standards. Meets industry requirements for cargo and fuel oil calculations.
📋 ASTM Table Selection
Volume Correction Factor for Crude Oils
Volume Correction Factor for Refined Petroleum Products
Weight Correction Factor (Air Weight)
🔬 Calculation Method
Note: Both methods use the same underlying ASTM formulas for maximum accuracy.
📊 Input Parameters
Ready for Calculation
Select ASTM table and enter parameters to calculate VCF or WCF values.
⚙️ How to Use
📌 When to Use
- Calculate VCF for cargo/fuel volume corrections
- Determine WCF for air weight calculations
- Verify BDN or cargo manifest calculations
- Prepare official bunker/cargo reports
🔧 How to Use
- Step 1: Select ASTM table (54A for crude, 54B for refined, 56 for weight)
- Step 2: Choose calculation method (both use same formulas)
- Step 3: Enter density at 15°C from certificate
- Step 4: Input observed temperature
- Step 5: Calculate to get VCF/WCF
📝 Note
Important: ASTM 54A is for crude oils, 54B for refined products (bunkers), and 56 for weight correction. Results are precise to 6 decimal places per industry standards.
💡 Example
Scenario: VLSFO bunker VCF
- • Table: ASTM 54B
- • Density@15°C: 950 kg/m³
- • Observed temp: 40°C
- • Result: VCF = 0.981933
🔄 API Gravity Conversions
Bidirectional conversions between API gravity, specific gravity, and density. Includes temperature corrections for US port operations and API standard documentation.
📥 Input Type
📊 Input Value
🌡️ Temperature Settings
Ready for Conversion
Enter API gravity, specific gravity, or density to perform bidirectional conversions.
⚙️ How to Use
📌 When to Use
- Convert between API gravity and density/SG
- Verify cargo certificates from US suppliers
- Prepare documentation for US port operations
- Cross-check fuel/cargo quality specifications
🔧 How to Use
- Step 1: Select input type (API, SG, or Density)
- Step 2: Enter the known value
- Step 3: Choose reference temperature (60°F or 15°C)
- Step 4: Input measurement temperature
- Step 5: Calculate to get all conversions
📝 Note
Important: API gravity is primarily used in the US petroleum industry. Standard reference is 60°F (15.56°C). Higher API = lighter oil.
💡 Example
Scenario: Light crude oil
- • Input: API Gravity = 35°API
- • Temperature: 60°F
- • Result: SG = 0.8498, Density = 848.96 kg/m³
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