Assume you meant 4" depth.
(100 sq. ft.) X (4 in.) X (1 ft. / 12 in) X (1 cu. yd. / 27 cu. ft.) = 1.235 cu. yd.
Order 1.5 or 2 cu. yd. so you don't have to pay another delivery charge if you run out.
At a poured depth of 4 inches, you will need 4.94 cubic yards.
1 cubic yard of concrete fills 27/depth in feet square feet.The number of cubic yards you need is(length of the pad in feet) x (width of the pad in feet) x (depth of the pad in inches)/324
If your pour to a standard 4-inch depth, you will need 3.54 Cubic Yards.
25 sq ft * 5 inch = 25/9 sq yards * 5/36 yards = (25/9)*(5/36) cubic yards = 125/216 cubic yards
77/9 cubic yards for every inch of depth.
1000 square feet/9 = 111.1 square yards of concrete 6 inches thick. This is the same as 111.1/4.5 = 24.7 cubic yards of concrete.
At a poured depth of 4 inches, you will need 4.94 cubic yards.
For 576 square feet at a depth of 4 inches, you will need 7.11 cubic yards.
For a 4-inch depth you will need 7.41 cubic yards.
1 cubic yard of concrete fills 27/depth in feet square feet.The number of cubic yards you need is(length of the pad in feet) x (width of the pad in feet) x (depth of the pad in inches)/324
720 square feet at the standard 4-inch depth requires 8.9 cubic yards.
If your pour to a standard 4-inch depth, you will need 3.54 Cubic Yards.
If you use a standard 4-inch depth, you will need at least 8.9 cubic yards.
3,800 square feet at a 4-inch depth requires 46.91 cubic yards.
Concrete in the bulk is measured in cubic yards. Concrete on the ground is often measured by square yards, but the depth of the concrete must be known, too. The price per cubic yard varies a lot across the US, plus not knowing the thickness of the concrete means that your question cannot reasonably be answered.
For a 4-inch depth: 4.75 cubic yards. For a 6-inch depth: 7.1 cubic yards.
2.2469 cubic yards for each inch of depth.