Let’s calculate your fill:
To calculate the amount if fill you need in cubic yards and tons
Measure from the inside edges of the footing/slab, width and length and enter those in the calculator accordingly.
Measure from the grade line to the existing ground in several places to average the depth (e.g. measure 10 places, add those dimensions and divide by ten ((number of measurements)) to average).
Then enter the average depth in the field: Depth Inches.