# Vessel Fuel Consumption — Free voyage and fuel calculator > Estimate daily consumption at another speed from a known speed and consumption using the cube law (admiralty). - URL: https://demo.fcrsoft.com/en/maritime/vessel-fuel-consumption - 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 Fuel Consumption Free tool # Vessel Fuel Consumption Estimate daily consumption at another speed from a known speed and consumption using the cube law (admiralty). 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=shipowner) ## Calculator Reference speed : 13 knots Daily consumption at reference speed : 30 t/gün New speed : 11.5 knots Speed exponent : 3 This calculator runs in your browser; the data you enter is not stored. ## Results Daily consumption at new speed 20.77 t/gün Per mile at reference speed 96.2 kg/nm Per mile at new speed 75.2 kg/nm Saving per mile 21.7 % **Track Voyage Economics Live**Result: **20.77**. FCRSOFT records each voyage’s estimate and actual and calculates TCE automatically. [Open the live demo](https://demo.fcrsoft.com/login.php?package=shipowner) [Request a demo](https://fcrsoft.com/en/contact/) ## Vessel Fuel Consumption: worked example Example values: Reference speed 13 knots, Daily consumption at reference speed 30 t/gün, New speed 11.5 knots, Speed exponent 3. With these values the results are: | Daily consumption at new speed | 20.77 t/gün | | Per mile at reference speed | 96.2 kg/nm | | Per mile at new speed | 75.2 kg/nm | | Saving per mile | 21.7 % | ### How to use: Vessel Fuel Consumption - Enter your own values: Reference speed, Daily consumption at reference speed, New speed, Speed exponent. - Results are calculated as you type: Daily consumption at new speed, Per mile at reference speed, Per mile at new speed, Saving per mile. - Check every step of the calculation in the formulas below. ## How is it calculated? - **Daily consumption at new speed** = [Daily consumption at reference speed] × ([New speed] ÷ [Reference speed])^[Speed exponent] - **Per mile at reference speed** = [Daily consumption at reference speed] ÷ ([Reference speed] × 24) × 1,000 - **Per mile at new speed** = [Daily consumption at new speed] ÷ ([New speed] × 24) × 1,000 - **Saving per mile** = (1 − [Per mile at new speed] ÷ [Per mile at reference speed]) × 100 ## Other tools running on Voyage Economics Engine Calculates voyage result and TCE from distance, speed, sea and port days, fuel, port, canal and hire costs. - [Bunker Calculator](https://demo.fcrsoft.com/en/maritime/bunker-calculator) - [Ship Fuel Cost](https://demo.fcrsoft.com/en/maritime/ship-fuel-cost) - [Voyage Fuel Calculator](https://demo.fcrsoft.com/en/maritime/voyage-fuel-calculator) - [Daily Fuel Consumption](https://demo.fcrsoft.com/en/maritime/daily-fuel-consumption) - [Fuel per Nautical Mile](https://demo.fcrsoft.com/en/maritime/fuel-per-nautical-mile) - [Bunker Cost](https://demo.fcrsoft.com/en/maritime/bunker-cost) - [VLSFO Cost](https://demo.fcrsoft.com/en/maritime/vlsfo-cost) - [MGO Cost](https://demo.fcrsoft.com/en/maritime/mgo-cost) - [ULSFO Cost](https://demo.fcrsoft.com/en/maritime/ulsfo-cost) - [Fuel Cost per Ton of Cargo](https://demo.fcrsoft.com/en/maritime/fuel-cost-per-ton-cargo) - [Voyage Cost Calculator](https://demo.fcrsoft.com/en/maritime/voyage-cost-calculator) - [Voyage Profit Calculator](https://demo.fcrsoft.com/en/maritime/voyage-profit-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. - 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) ## Frequently asked questions How is Vessel Fuel Consumption calculated? Estimate daily consumption at another speed from a known speed and consumption using the cube law (admiralty). The calculation uses Voyage Economics Engine: Calculates voyage result and TCE from distance, speed, sea and port days, fuel, port, canal and hire costs. How is Daily consumption at new speed found? Daily consumption at new speed = [Daily consumption at reference speed] × ([New speed] ÷ [Reference speed])^[Speed exponent]. With the example values (Reference speed 13 knots, Daily consumption at reference speed 30 t/gün, New speed 11.5 knots, Speed exponent 3) the result is 20.77 t/gün. How is Per mile at new speed found? Per mile at new speed = [Daily consumption at new speed] ÷ ([New speed] × 24) × 1,000. With the example values (Reference speed 13 knots, Daily consumption at reference speed 30 t/gün, New speed 11.5 knots, Speed exponent 3) the result is 75.2 kg/nm. Worked example: Vessel Fuel Consumption Example values: Reference speed 13 knots, Daily consumption at reference speed 30 t/gün, New speed 11.5 knots, Speed exponent 3. Daily consumption at new speed: 20.77 t/gün; Per mile at reference speed: 96.2 kg/nm; Per mile at new speed: 75.2 kg/nm; Saving per mile: 21.7 %. Is Vessel Fuel Consumption 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 records each voyage’s estimate and actual and calculates TCE automatically. You can try the Shipowner & Ship Management package in the live demo without installing anything. ## Related tools and guides [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 ### 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) [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)