Dowel Bar Grout Calculation

Diameter Inches	Cubic Inches / Inch Depth
1/8"	0.025
1/4"	0.05
3/8"	0.125
1/2"	0.20
5/8"	0.325
3/4"	0.45
7/8"	0.625
1"	0.80
1-1/8"	1.025
1-1/4"	1.25
1-3/8"	1.525
1-1/2"	1.80
1-5/8"	2.10
1-3/4"	2.40
1-7/8"	2.775
2"	3.15

To determine the amount of epoxy grout required, subtract the column of blot diameter from the volume of the drilled hole diameter and multiply by the depth in inches. The result will be in cubic inches. Divide by 231 (cubic inches per gallon). The result will be the number of gallons required.

Example:
There are 93 holes 25 inches deep. The hole diameter is 1-3/8 inches and the bold diameter is 1-1/8 inches. From the chart above, find the volumes and subtract.

Diameter of Hole 1-3/8"	Volume Per Inch 1.525
Diameter of Bold 1-3/8"	Volume Per Inch -1.025
	0.500
Multiply 0.5 X 25 X 93 = 1,162.5 Cubic Inches Divide by 231 = 5.03 Gallons