# Free Maritime Calculators — DWT, Draft, Bunker, TCE, Laytime and Distance

> Free calculators for DWT, displacement, draft, trim, TPC, bunkers, voyage cost, TCE, laytime, demurrage/despatch, ETA and port-to-port distance.

- URL: https://demo.fcrsoft.com/en/maritime
- Language: en
- Updated: 2026-10-03
- Publisher: FCRSOFT (https://fcrsoft.com)

[Demos](https://demo.fcrsoft.com/?hl=en) / [Free Tools](https://demo.fcrsoft.com/en/tools) / Maritime Calculators FCRSOFT

# Maritime Calculators

Calculate ship capacity, voyage economics and port time, and produce your voyage estimate in minutes.
[See the system that does this automatically Open the live demo](https://demo.fcrsoft.com/login.php?package=shipowner)

## Vessel and Capacity (24)

[Free tool ### DWT Calculator Calculate DWT (carrying capacity) from displacement and lightship weight, and the cargo capacity left after fuel, water and stores. Open the tool](https://demo.fcrsoft.com/en/maritime/dwt-calculator) [Free tool ### Displacement Calculator Calculate a ship’s volume and weight displacement from length, breadth, draft, block coefficient and water density. Open the tool](https://demo.fcrsoft.com/en/maritime/displacement-calculator) [Free tool ### Lightship Weight Calculator Calculate lightship weight and its share of displacement from summer displacement and DWT. Open the tool](https://demo.fcrsoft.com/en/maritime/lightship-weight-calculator) [Free tool ### Cargo Capacity Calculator Deduct fuel, fresh water, stores, residual ballast and constant from DWT to calculate the net cargo you can carry. Open the tool](https://demo.fcrsoft.com/en/maritime/cargo-capacity-calculator) [Free tool ### Cargo Intake Calculator Find the maximum cargo the ship can take and the binding limit from draft restriction, DWT and hold volume. Open the tool](https://demo.fcrsoft.com/en/maritime/cargo-intake-calculator) [Free tool ### DWT Utilization Calculate loaded cargo as a share of DWT and net cargo capacity, the unused capacity and the freight lost. Open the tool](https://demo.fcrsoft.com/en/maritime/dwt-utilization-calculator) [Free tool ### Draft Calculator Calculate mean draft from displacement, length, breadth and block coefficient, and the draft increase after loading using TPC. Open the tool](https://demo.fcrsoft.com/en/maritime/draft-calculator) [Free tool ### Mean Draft Calculator Calculate mean draft, sag/hog effect and quarter mean from forward, aft and midship draft readings. Open the tool](https://demo.fcrsoft.com/en/maritime/mean-draft-calculator) [Free tool ### Forward / Aft Draft Calculator Calculate forward and aft drafts from true mean draft at the LCF and trim. Open the tool](https://demo.fcrsoft.com/en/maritime/forward-aft-draft-calculator) [Free tool ### Trim Calculator Calculate trim, trim angle and trim direction from forward and aft drafts. Open the tool](https://demo.fcrsoft.com/en/maritime/trim-calculator) [Free tool ### Trim by Stern (Loading Effect) Calculate the change of trim and new forward/aft drafts from loading or shifting a weight, using TPC and MCTC. Open the tool](https://demo.fcrsoft.com/en/maritime/trim-by-stern-calculator) [Free tool ### Freeboard Calculator Calculate current freeboard and the margin to the load line from moulded depth, deck thickness and draft. Open the tool](https://demo.fcrsoft.com/en/maritime/freeboard-calculator) [Free tool ### TPC Calculator Calculate tonnes per centimetre immersion (TPC) from waterplane area and the cargo matching a given draft change. Open the tool](https://demo.fcrsoft.com/en/maritime/tpc-calculator) [Free tool ### MCT Calculator Calculate the moment to change trim one centimetre (MCTC) from displacement, longitudinal metacentric height (GML) and length. Open the tool](https://demo.fcrsoft.com/en/maritime/mct-calculator) [Free tool ### Deadweight Scale Calculate displacement and DWT at an observed draft by linear interpolation between light and summer conditions. Open the tool](https://demo.fcrsoft.com/en/maritime/deadweight-scale) [Free tool ### Vessel Capacity Calculator Add up hold volumes and calculate volumetric capacity for the cargo’s stowage factor, the DWT limit and the cargo that can be carried. Open the tool](https://demo.fcrsoft.com/en/maritime/vessel-capacity-calculator) [Free tool ### Vessel Utilization Calculate cargo capacity utilization and annual time utilization (laden, ballast, port and idle days). Open the tool](https://demo.fcrsoft.com/en/maritime/vessel-utilization) [Free tool ### TEU Calculator Calculate total TEU and FEU from numbers of 20, 40 and 45ft containers. Open the tool](https://demo.fcrsoft.com/en/maritime/teu-calculator) [Free tool ### FEU Calculator Convert a container mix into FEU (forty-foot equivalent) and see its TEU equivalent. Open the tool](https://demo.fcrsoft.com/en/maritime/feu-calculator) [Free tool ### TEU to FEU Converter Convert TEU capacity to FEU and FEU to TEU; turn ship capacity into a number of 40ft containers. Open the tool](https://demo.fcrsoft.com/en/maritime/teu-to-feu) [Free tool ### Vessel Cargo Calculator Calculate volume used, hold utilization and total cargo from cargo quantity and stowage factor per hold. Open the tool](https://demo.fcrsoft.com/en/maritime/vessel-cargo-calculator) [Free tool ### Cargo Density Calculator Calculate density, stowage factor and heavy or light cargo class from cargo weight and volume. Open the tool](https://demo.fcrsoft.com/en/maritime/cargo-density-calculator) [Free tool ### Stowage Factor Calculator Calculate stowage factor in m³/t and ft³/LT from cargo volume, weight and broken stowage allowance. Open the tool](https://demo.fcrsoft.com/en/maritime/stowage-factor-calculator) [Free tool ### Stowage Factor Converter Convert stowage factor between m³/t and ft³/LT (long ton). Open the tool](https://demo.fcrsoft.com/en/maritime/stowage-factor-converter)

**Track Voyage Economics Live**FCRSOFT records each voyage’s fuel, port and canal costs, freight revenue and TCE as both estimate and actual.
[Open the live demo](https://demo.fcrsoft.com/login.php?package=shipowner) [Request a demo](https://fcrsoft.com/en/contact/)

## Fuel and Voyage Economics (19)

[Free tool ### Bunker Calculator Calculate sea and port fuel, safety margin and bunker cost from distance, speed and daily consumption. Open the tool](https://demo.fcrsoft.com/en/maritime/bunker-calculator) [Free tool ### Vessel Fuel Consumption Estimate daily consumption at another speed from a known speed and consumption using the cube law (admiralty). Open the tool](https://demo.fcrsoft.com/en/maritime/vessel-fuel-consumption) [Free tool ### Ship Fuel Cost Multiply main fuel and MGO consumption by sea and port days to calculate total fuel cost. Open the tool](https://demo.fcrsoft.com/en/maritime/ship-fuel-cost) [Free tool ### Voyage Fuel Calculator Calculate a voyage’s total fuel need and bunkering quantity with separate speed and consumption for ballast and laden legs. Open the tool](https://demo.fcrsoft.com/en/maritime/voyage-fuel-calculator) [Free tool ### Daily Fuel Consumption Calculate daily fuel consumption from main engine power, engine load and specific fuel oil consumption (SFOC). Open the tool](https://demo.fcrsoft.com/en/maritime/daily-fuel-consumption) [Free tool ### Fuel per Nautical Mile Calculate fuel and cost per nautical mile from daily consumption and speed. Open the tool](https://demo.fcrsoft.com/en/maritime/fuel-per-nautical-mile) [Free tool ### Bunker Cost Calculate the total bunker invoice from VLSFO and MGO quantities, prices and barge and survey fees. Open the tool](https://demo.fcrsoft.com/en/maritime/bunker-cost) [Free tool ### VLSFO Cost Calculate the delivered cost of a very-low-sulphur fuel oil (VLSFO, 0.5% S) stem and the daily fuel cost. Open the tool](https://demo.fcrsoft.com/en/maritime/vlsfo-cost) [Free tool ### MGO Cost Calculate the delivered cost of a marine gas oil (MGO, 0.1% S) stem and the daily fuel cost in ECA zones. Open the tool](https://demo.fcrsoft.com/en/maritime/mgo-cost) [Free tool ### ULSFO Cost Calculate the delivered cost of an ultra-low-sulphur fuel oil (ULSFO, 0.1% S) stem and the daily fuel cost. Open the tool](https://demo.fcrsoft.com/en/maritime/ulsfo-cost) [Free tool ### Fuel Cost per Ton of Cargo Divide a voyage’s total fuel cost by cargo carried to get fuel cost per ton and its share of the freight rate. Open the tool](https://demo.fcrsoft.com/en/maritime/fuel-cost-per-ton-cargo) [Free tool ### Voyage Cost Calculator Add fuel, port, canal, agency, insurance and commission costs to calculate voyage cost and cost per ton. Open the tool](https://demo.fcrsoft.com/en/maritime/voyage-cost-calculator) [Free tool ### Voyage Profit Calculator Deduct voyage costs and ship hire or running cost from freight revenue to calculate voyage profit and daily profit. Open the tool](https://demo.fcrsoft.com/en/maritime/voyage-profit-calculator) [Free tool ### Voyage Revenue Calculator Calculate gross and net voyage revenue from cargo, freight rate, commissions and demurrage income. Open the tool](https://demo.fcrsoft.com/en/maritime/voyage-revenue-calculator) [Free tool ### TCE Calculator Deduct voyage costs from voyage revenue and divide by voyage days to get the time charter equivalent (TCE). Open the tool](https://demo.fcrsoft.com/en/maritime/tce-calculator) [Free tool ### Daily TCE Comparison Compare the voyage TCE with a time charter offer and daily operating expenses to see which is more profitable. Open the tool](https://demo.fcrsoft.com/en/maritime/tce-per-day) [Free tool ### Slow Steaming Calculator Compare the fuel saving from slowing down with the hire cost of the longer voyage. Open the tool](https://demo.fcrsoft.com/en/maritime/slow-steaming-calculator) [Free tool ### Ship Break-even Calculator Calculate the minimum freight rate covering voyage costs and daily ship cost, and the break-even TCE. Open the tool](https://demo.fcrsoft.com/en/maritime/ship-break-even-calculator) [Free tool ### Voyage Estimate Calculate voyage result and TCE on one screen from ballast and laden legs, port days, fuel, port and canal costs, freight and commissions. Open the tool](https://demo.fcrsoft.com/en/maritime/voyage-estimate)

## Port and Charter (21)

[Free tool ### Time Charter Calculator Calculate time charter income from daily hire, period, off-hire days, commissions and bunker difference on delivery. Open the tool](https://demo.fcrsoft.com/en/maritime/time-charter-calculator) [Free tool ### Voyage Charter Calculator Calculate voyage charter income from freight rate, cargo tolerance (MOLOO), commissions and demurrage or despatch. Open the tool](https://demo.fcrsoft.com/en/maritime/voyage-charter-calculator) [Free tool ### Port Distance Calculator Estimate the sea distance between two ports including canal and strait transits, and see the sailing time. Open the tool](https://demo.fcrsoft.com/en/maritime/port-distance-calculator) [Free tool ### Sea Distance Calculator Calculate route distance, sailing time and fuel via the ports and passages you choose. Open the tool](https://demo.fcrsoft.com/en/maritime/sea-distance-calculator) [Free tool ### Nautical Mile Calculator Calculate the great-circle distance between two coordinates in nautical miles, km and statute miles, and the time at a given speed in knots. Open the tool](https://demo.fcrsoft.com/en/maritime/nautical-mile-calculator) [Free tool ### ETA Calculator Calculate the estimated time of arrival (ETA) from departure time, distance, speed and weather margin. Open the tool](https://demo.fcrsoft.com/en/maritime/eta-calculator) [Free tool ### ETD Calculator Calculate the latest departure time (ETD) to meet a target arrival and the minimum speed needed. Open the tool](https://demo.fcrsoft.com/en/maritime/etd-calculator) [Free tool ### ETB Calculator Calculate the estimated time of berthing (ETB) from arrival time, anchorage waiting, pilotage and berthing time. Open the tool](https://demo.fcrsoft.com/en/maritime/etb-calculator) [Free tool ### ETC Calculator Calculate the estimated time of completion (ETC) from berthing time, cargo quantity and handling rate. Open the tool](https://demo.fcrsoft.com/en/maritime/etc-calculator) [Free tool ### Port Stay Calculator Calculate time in port from arrival and departure times, and the hire cost of that time. Open the tool](https://demo.fcrsoft.com/en/maritime/port-stay-calculator) [Free tool ### Port Time Calculator Add waiting, berthing, operations and departure preparation to see how port time is split. Open the tool](https://demo.fcrsoft.com/en/maritime/port-time-calculator) [Free tool ### Port Cost Calculator Calculate port cost from GT-based port and light dues, pilotage, towage, mooring and agency fees. Open the tool](https://demo.fcrsoft.com/en/maritime/port-cost-calculator) [Free tool ### Port Call Cost Add the hire and fuel cost of days in port to port charges to find the full cost of a port call. Open the tool](https://demo.fcrsoft.com/en/maritime/port-call-cost) [Free tool ### Berth Time Calculator Calculate how long the ship stays at berth from cargo quantity, handling rate and preparation time. Open the tool](https://demo.fcrsoft.com/en/maritime/berth-time-calculator) [Free tool ### Cargo Operation Time Calculate loading or discharging time from number of cranes, hourly rate per crane and efficiency. Open the tool](https://demo.fcrsoft.com/en/maritime/cargo-operation-time) [Free tool ### Laytime Calculator Calculate allowed time, time used and demurrage or despatch from cargo, daily loading rate, NOR and turn time. Open the tool](https://demo.fcrsoft.com/en/maritime/laytime-calculator) [Free tool ### Laycan Calculator Compare laycan start and end dates with the vessel’s ETA to see if it is early, on time or at risk of cancellation. Open the tool](https://demo.fcrsoft.com/en/maritime/laycan-calculator) [Free tool ### NOR Calculator Calculate when laytime commences from the notice of readiness (NOR) time and turn time, applying office-hours rules. Open the tool](https://demo.fcrsoft.com/en/maritime/nor-calculator) [Free tool ### Despatch Calculator Calculate time saved and despatch money (usually half demurrage) when loading finishes before allowed time. Open the tool](https://demo.fcrsoft.com/en/maritime/despatch-calculator) [Free tool ### Demurrage and Despatch Calculator Find net demurrage or despatch by calculating allowed and used time at load and discharge ports separately or together (reversible). Open the tool](https://demo.fcrsoft.com/en/maritime/demurrage-despatch-calculator) [Free tool ### Port Turnaround Time Calculate total turnaround from arrival to departure, waiting share and berth productivity. Open the tool](https://demo.fcrsoft.com/en/maritime/port-turnaround-time)

## Related guides

[Guide ### What Is DWT (Deadweight)? The relationship between DWT, displacement, lightship weight, draft, TPC and cargo capacity — how to calculate how many tons of cargo a ship can really take. Read the guide](https://demo.fcrsoft.com/en/maritime/what-is-dwt) [Guide ### What Is TCE (Time Charter Equivalent)? How TCE is calculated and how to compare voyage and time charters — a worked example with freight revenue, voyage costs, fuel and port days. Read the guide](https://demo.fcrsoft.com/en/maritime/what-is-tce) [Guide ### What Is Laytime and How Is It Calculated? Laytime in voyage charters, NOR, turn time, SHINC/SHEX terms, excepted periods and demurrage/despatch calculation with examples. Read the guide](https://demo.fcrsoft.com/en/maritime/what-is-laytime)

FCRSOFT

## FCRSOFT does this for you automatically

You don’t need to do the calculations and checks on this page by hand every day. FCRSOFT derives them all automatically from the records entered in the field.

- Fuel, port and canal costs are recorded for every voyage.

- TCE and voyage result are compared as estimate versus actual.

- Bunker purchases and consumption are tracked per voyage.

[Open the live demo](https://demo.fcrsoft.com/login.php?package=shipowner) [Explore the Shipowner & Ship Management package](https://demo.fcrsoft.com/demo/shipowner?hl=en)

[demo.fcrsoft.com](https://demo.fcrsoft.com/login.php?package=shipowner)