Wave Height Calculation

Wave Height Calculator

Enter wind speed (see map above):

Enter fetch distance (nautical miles):

Calculate Wave Height

Save this calculator as a favorite and use it as often as you like: bookmark this calculator or press Ctrl+D.

This is how it works

Enter the wind speed in knots and the fetch distance in nautical miles. Click “Calculate Wave Height” to get an estimate of the wave height in meters. The tool instantly calculates the approximate height based on wind conditions and water surface area.

Why use it?

Understanding wave height is crucial for safe navigation at sea. Large waves can impact the stability of a boat (with a higher motion sickness risk), making it essential for captains to estimate wave conditions in advance. This tool provides a quick and reliable way to predict wave height based on wind conditions and fetch distance.