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 
11/8" 
1.025 
11/4" 
1.25 
13/8" 
1.525 
11/2" 
1.80 
15/8" 
2.10 
13/4" 
2.40 
17/8" 
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:

