Bow Thruster Calculator

The on-line bow thruster calculator below is supplied only as a guide. Please refer to the bow thruster manufactures specifications to confirm the correct thruster is selected prior to purchase.

Enter the boats length and average height above the waterline. The average height is needed to calculate the wind forces exerted on the boat, please take into consideration any structures including, fly-bridges, masts, rigging. etc..

The results are supplied kgf and are based on the wind conditions the vessel will be operated in.

Enter Details Below

Length in Metres

Average Height in Metres

Results Shown in kgf

Force 2 = 4 - 6 Knots

Force 3 = 7 - 10 Knots

Force 4 = 11 - 15 Knots

Force 5 = 16 - 21 Knots

Force 6 = 22 - 27 Knots