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Free Maritime Tools

Bulk Shipping Tools

Calculators and unit converters for dry bulk shipping professionals, traders, brokers and crew. TCE, freight revenue, voyage cost, stowage factor, demurrage, laytime and more.

Voyage Calculators
TCE Calculator
Time Charter Equivalent — daily vessel earnings after voyage costs. The universal benchmark for comparing freight across routes.
Gross Freight Revenue (USD)
Voyage Days (laden + ballast)
Bunker Cost (USD/day)
Port / Canal Costs (USD total)
Address Commission (%)
Brokerage Commission (%)
Voyage Cost Estimator
Estimate total voyage costs — bunkers, port fees, canal tolls and commissions — from route distance and vessel speed.
Distance (Nautical Miles)
Speed (Knots)
Bunker Price (USD/MT)
Daily Consumption (MT/day)
Port / Canal Costs (USD)
Commission (%)
Freight Revenue Calculator
Calculate gross and net freight revenue from cargo quantity and lumpsum or $/MT rate, after address commission and brokerage.
Cargo Quantity (MT)
Freight Rate (USD/MT)
OR Lumpsum Freight (USD)
Worldscale Flat Rate
Address Commission (%)
Brokerage (%)
Cargo Intake / Stowage Calculator
Find maximum cargo intake for a hold volume, or the volume required for a given cargo quantity. Includes common SF presets.
Cargo Type (sets SF)
Stowage Factor (m³/MT)
Broken Stowage (%)
Hold Volume (m³) → Cargo Intake
Cargo Quantity (MT) → Volume Needed
Bunker Cost Calculator
Calculate daily and total voyage bunker costs. Supports VLSFO, LSMGO and scrubber vessel calculations with IFO 380 equivalent.
Daily Consumption (MT/day)
Bunker Price (USD/MT)
Sea Days (laden)
Port Days (idle)
Port Consumption (MT/day)
Ballast Factor (sea days %)
Enter consumption and price above
Demurrage Calculator
Calculate laytime used, laytime remaining and demurrage or despatch due. Enter allowed laytime, loading/discharging rate and actual time used.
Cargo Quantity (MT)
Loading Rate (MT/day)
Demurrage Rate (USD/day)
Actual Days Used
Despatch = (½ × demurrage rate if applicable)
Speed & Consumption Calculator
Calculate how consumption changes with speed (cubic law). Find the fuel saving or cost of slow-steaming vs design speed.
Design Speed (knots)
Design Consumption (MT/day)
Actual Speed (knots)
Bunker Price (USD/MT)
Route Distance (nm)
Vessel Capacity Checker
Check whether a cargo quantity will fit on a vessel, given grain capacity, deadweight and draft limitations.
Vessel Grain Capacity (m³)
Vessel DWT (MT)
Cargo Quantity (MT)
Stowage Factor (m³/MT)
Constants / Bunkers on Board (MT)
Unit Converters
Weight / Mass
Volume / Capacity
Force / Load (SWL, kN)
Distance
Speed
Temperature
Pressure
Power / Energy
Reference Tables
Stowage Factors
CargoSF (m³/MT)
Iron Ore0.40–0.60
Coal (thermal)1.10–1.40
Coal (coking)1.25–1.50
Wheat1.35–1.55
Soyabeans1.50–1.70
Maize / Corn1.28–1.48
Fertiliser (bulk)1.10–1.30
Bauxite0.80–1.00
Petcoke1.40–1.70
Woodchips1.70–2.20
Sugar (raw)1.05–1.25
Cement (bulk)0.90–1.10
Steel (coils/plate)0.20–0.35
Salt0.90–1.10
Key Maritime Distances
RoutenmDays@13kn
Tubarao → Qingdao (C3)11,500~37
W Australia → Qingdao (C5)4,600~15
Richards Bay → Rotterdam6,500~21
US Gulf → Japan (P1)9,200~30
US Gulf → ARA (P2)4,800~15
Black Sea → China12,800~41
Australia → Japan (coal)3,800~12
Indonesia → China (coal)2,200~7
Rotterdam → Singapore8,300~27
Constanta → China (Black Sea)13,200~42
Santos → Rotterdam5,200~17
New Orleans → Rotterdam4,780~15
Quick Unit Conversions
From → ToFactor
1 MT → Long Tonnes× 0.9842
1 MT → Short Tonnes× 1.1023
1 MT → kg× 1,000
1 nm → km× 1.852
1 nm → statute mi× 1.1508
1 knot → km/h× 1.852
1 kN → kgf× 101.97
1 tf → kN× 9.807
1 lbf → N× 4.448
1 m³ → ft³× 35.315
1 bbl → litres× 158.99
1 bar → PSI× 14.504
1 kW → HP× 1.341
°F → °C(°F−32)÷1.8
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