Marine Engineering Calculators
Free calculators and field references for boaters, marine engineers, and yacht professionals. Anchor scope, bilge pump sizing, bollard pull, hull speed, prop slip — runs on mobile for dockside use.
Calculators
5
References
2
Beaufort forces
0–12
Standards
ABYCA-16 · E-11
Calculators
References
Tip
All calculators support imperial and metric. Bilge pump sizing
assumes open-flow ratings — real-world flow through typical hose
runs and 3–4 ft of head drops 30–50%. Always size aggregate
capacity at the high end and plan for one pump to fail.
No bars in the engine room, none past the breakwater
The web page can't load once the boat leaves coverage
Marine Toolkit keeps ABYC E-11 ampacity and tank/scope math on the phone, saves each run, and works in the engine room and offshore. Pay once, own it.
CalcSpec tools are estimators for qualified boaters, marine engineers, and ABYC-certified technicians. Results do not replace current ABYC standards, USCG regulations, the NWS marine forecast, or the judgment of a licensed marine surveyor.