# Trim Calculator — Free vessel calculator > Calculate trim, trim angle and trim direction from forward and aft drafts. - URL: https://demo.fcrsoft.com/en/maritime/trim-calculator - 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) / Trim Calculator Free tool # Trim Calculator Calculate trim, trim angle and trim direction from forward and aft drafts. 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 Forward draft : 11.8 m Aft draft : 12.6 m Length between perpendiculars (LBP) : 190 m This calculator runs in your browser; the data you enter is not stored. ## Results Trim 0.80 m Trim 80 cm Trim angle 0.241 ° Trim direction Trimmed by the stern **Keep Your Fleet and Vessel Data in One Place**Result: **0.80**. 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/) ## Trim Calculator: worked example Example values: Forward draft 11.8 m, Aft draft 12.6 m, Length between perpendiculars (LBP) 190 m. With these values the results are: | Trim | 0.80 m | | Trim | 80 cm | | Trim angle | 0.241 ° | | Trim direction | Trimmed by the stern | ### How to use: Trim Calculator - Enter your own values: Forward draft, Aft draft, Length between perpendiculars (LBP). - Results are calculated as you type: Trim, Trim, Trim angle, Trim direction. - Check every step of the calculation in the formulas below. ## How is it calculated? - **Trim** = [Aft draft] − [Forward draft] - **Trim** = ([Aft draft] − [Forward draft]) × 100 - **Trim angle** = deg(atan(([Aft draft] − [Forward draft]) ÷ [Length between perpendiculars (LBP)])) 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 by Stern (Loading Effect)](https://demo.fcrsoft.com/en/maritime/trim-by-stern-calculator) - [Freeboard Calculator](https://demo.fcrsoft.com/en/maritime/freeboard-calculator) - [TPC Calculator](https://demo.fcrsoft.com/en/maritime/tpc-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 Trim Calculator calculated? Calculate trim, trim angle and trim direction from forward and aft drafts. 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 Trim found? Trim = [Aft draft] − [Forward draft]. With the example values (Forward draft 11.8 m, Aft draft 12.6 m, Length between perpendiculars (LBP) 190 m) the result is 0.80 m. Worked example: Trim Calculator Example values: Forward draft 11.8 m, Aft draft 12.6 m, Length between perpendiculars (LBP) 190 m. Trim: 0.80 m; Trim: 80 cm; Trim angle: 0.241 °; Trim direction: Trimmed by the stern. Is Trim Calculator 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 ### 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 ### 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 ### 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) [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)