What is the formula to convert climb gradient from feet per nautical mile to feet per minute?

To convert climb gradient measured in feet per nautical mile to feet per minute, the correct formula involves multiplying the climb gradient (in feet per nautical mile) by the rate of travel over the ground in nautical miles per minute. This method aligns the vertical measurement of climb (in feet) with the time component (in minutes) to provide a rate of climb in feet per minute.

When converting units, it is crucial to ensure that the horizontal component (nautical miles) is consistent with the time measure. Therefore, multiplying by nautical miles per minute accounts for the time it takes to traverse that distance, resulting in an accurate representation of climb performance in vertical terms (feet per minute). This allows pilots and those in aviation to assess climb capabilities effectively based on their speed and climb gradient.