How do you calculate volume of fill needed for landscaping?

To calculate the volume of fill needed for landscaping, first determine the area to be filled by measuring its length and width. Then, decide on the desired depth of the fill. Multiply the area (length x width) by the depth to get the volume in cubic units (e.g., cubic feet or cubic meters). If the area is irregularly shaped, break it down into smaller sections, calculate the volume for each, and sum them up.