# Vessel Utilization — Free vessel calculator > Calculate cargo capacity utilization and annual time utilization (laden, ballast, port and idle days). - URL: https://demo.fcrsoft.com/en/maritime/vessel-utilization - 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](https://demo.fcrsoft.com/en/maritime) / Vessel Utilization Free tool # Vessel Utilization Calculate cargo capacity utilization and annual time utilization (laden, ballast, port and idle days). No sign-up needed; results update as you type. [See the system that does this automatically Open the live demo](https://demo.fcrsoft.com/login.php?package=fleet) ## Calculator Summer DWT : 58000 t Average cargo loaded : 50000 t Laden sea days (per year) : 170 days Ballast sea days : 90 days Days in port : 80 days This calculator runs in your browser; the data you enter is not stored. ## Results Cargo capacity utilization 86.2 % Idle days 25 days Laden ratio 46.6 % Commercial utilization (sea + port) 93.2 % **Keep Your Fleet and Vessel Data in One Place**Result: **86.2 %**. FCRSOFT stores DWT, TPC and draft data on vessel cards and uses it automatically in voyage estimates. [Open the live demo](https://demo.fcrsoft.com/login.php?package=fleet) [Request a demo](https://fcrsoft.com/en/contact/) ## Vessel Utilization: worked example Example values: Summer DWT 58,000 t, Average cargo loaded 50,000 t, Laden sea days (per year) 170 days, Ballast sea days 90 days, Days in port 80 days. With these values the results are: | Cargo capacity utilization | 86.2 % | | Idle days | 25 days | | Laden ratio | 46.6 % | | Commercial utilization (sea + port) | 93.2 % | ### How to use: Vessel Utilization - Enter your own values: Summer DWT, Average cargo loaded, Laden sea days (per year), Ballast sea days, Days in port. - Results are calculated as you type: Cargo capacity utilization, Idle days, Laden ratio, Commercial utilization (sea + port). - Check every step of the calculation in the formulas below. ## How is it calculated? - **Cargo capacity utilization** = [Average cargo loaded] ÷ [Summer DWT] × 100 - **Idle days** = max(0; 365 − [Laden sea days (per year)] − [Ballast sea days] − [Days in port]) - **Laden ratio** = [Laden sea days (per year)] ÷ 365 × 100 - **Commercial utilization (sea + port)** = ([Laden sea days (per year)] + [Ballast sea days] + [Days in port]) ÷ 365 × 100 Ship calculations are estimates based on standard formulas. Loading, stability and draft decisions must be based on the ship’s approved documents and loading computer. ## Other tools running on Vessel Hydrostatics Engine Calculates DWT, displacement, draft, trim, TPC and MCT relationships with standard naval formulas; results must be checked against approved vessel data. - [DWT Calculator](https://demo.fcrsoft.com/en/maritime/dwt-calculator) - [Displacement Calculator](https://demo.fcrsoft.com/en/maritime/displacement-calculator) - [Lightship Weight Calculator](https://demo.fcrsoft.com/en/maritime/lightship-weight-calculator) - [Cargo Capacity Calculator](https://demo.fcrsoft.com/en/maritime/cargo-capacity-calculator) - [Cargo Intake Calculator](https://demo.fcrsoft.com/en/maritime/cargo-intake-calculator) - [DWT Utilization](https://demo.fcrsoft.com/en/maritime/dwt-utilization-calculator) - [Draft Calculator](https://demo.fcrsoft.com/en/maritime/draft-calculator) - [Mean Draft Calculator](https://demo.fcrsoft.com/en/maritime/mean-draft-calculator) - [Forward / Aft Draft Calculator](https://demo.fcrsoft.com/en/maritime/forward-aft-draft-calculator) - [Trim Calculator](https://demo.fcrsoft.com/en/maritime/trim-calculator) - [Trim by Stern (Loading Effect)](https://demo.fcrsoft.com/en/maritime/trim-by-stern-calculator) - [Freeboard Calculator](https://demo.fcrsoft.com/en/maritime/freeboard-calculator) 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. - DWT, TPC, draft and capacity data are stored on vessel cards. - Certificate and document expiry dates are tracked, with warnings before they lapse. - Voyage estimates use vessel data automatically. [Open the live demo](https://demo.fcrsoft.com/login.php?package=fleet) [Explore the Fleet & Vessel package](https://demo.fcrsoft.com/demo/fleet?hl=en) [demo.fcrsoft.com](https://demo.fcrsoft.com/login.php?package=fleet) ## Frequently asked questions How is Vessel Utilization calculated? Calculate cargo capacity utilization and annual time utilization (laden, ballast, port and idle days). The calculation uses Vessel Hydrostatics Engine: Calculates DWT, displacement, draft, trim, TPC and MCT relationships with standard naval formulas; results must be checked against approved vessel data. How is Cargo capacity utilization found? Cargo capacity utilization = [Average cargo loaded] ÷ [Summer DWT] × 100. With the example values (Summer DWT 58,000 t, Average cargo loaded 50,000 t, Laden sea days (per year) 170 days, Ballast sea days 90 days, Days in port 80 days) the result is 86.2 %. How is Laden ratio found? Laden ratio = [Laden sea days (per year)] ÷ 365 × 100. With the example values (Summer DWT 58,000 t, Average cargo loaded 50,000 t, Laden sea days (per year) 170 days, Ballast sea days 90 days, Days in port 80 days) the result is 46.6 %. Worked example: Vessel Utilization Example values: Summer DWT 58,000 t, Average cargo loaded 50,000 t, Laden sea days (per year) 170 days, Ballast sea days 90 days, Days in port 80 days. Cargo capacity utilization: 86.2 %; Idle days: 25 days; Laden ratio: 46.6 %; Commercial utilization (sea + port): 93.2 %. Is Vessel Utilization free? Yes. The tool is free, needs no sign-up and runs in your browser; the data you enter is not stored. Can FCRSOFT do this calculation automatically? FCRSOFT stores DWT, TPC and draft data on vessel cards and uses it automatically in voyage estimates. You can try the Fleet & Vessel package in the live demo without installing anything. Do the results replace official ship calculations? No. Ship calculations are estimates based on standard formulas. Loading, stability and draft decisions must be based on the ship’s approved documents and loading computer. ## Related tools and guides [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 ### 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) [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)