The Anode Calculator from Opferanode24 – The easy way to determine your boat's underwater surface area

Choosing the right type and quantity of sacrificial anodes depends largely on your boat’s underwater surface area. While many boat owners know their boat’s dimensions, they often don’t know the actual surface area submerged in the water. This is exactly where the anode calculator from Opferanode24 comes in.

Why the underwater surface area is crucial

The underwater surface area determines the extent to which your boat is exposed to corrosive influences in the water. The larger the surface area, the more anode material is needed to reliably protect the hull and propulsion system. An accurate assessment is therefore the foundation for effective corrosion prevention.

What the Anode Calculator Does

The calculator is intentionally designed to be clear and straightforward.

First, select the type of boat:

• Motorboat

• Short-keel boat

• Long-keel boat

Then enter three values:

• Waterline length

• Beam

• Draft

Based on this information, the calculator determines the submerged area in square meters (m²). The result appears immediately and provides a reliable guide for further planning of your anodes.

Try out the anode calculator now.