### Calculate How Much Driveway Gravel You Need | …

To calculate the volume, multiply the three measurements, length by width by depth. For instance, if you have a gravel driveway that is 36 feet long, 9 feet wide, and 3 inches deep, multiply: For instance, if you have a gravel driveway that is 36 feet long, 9 feet wide, and 3 inches deep, multiply: