Civil - Concrete Block Calculator , Formulas ,Tables
Concrete Block Calculator
An online concrete block calculation
Concrete Block Calculator Formulas
Number Of Blocks = (Length x Width) / Block Size
Frequently Used Block Dimension Table
2″ and 3″ CMU |
Size D x H x W |
Nominal D x H x W |
Blocks per 100 ft2 |
2″ x 8″ x 16″ |
1 5⁄8” x 7 5⁄8” x 15 5⁄8” |
113 |
3″ x 8″ x 16″ |
2 5⁄8” x 7 5⁄8” x 15 5⁄8” |
113 |
4″ CMU |
Size D x H x W |
Nominal D x H x W |
Blocks per 100 ft2 |
4″ x 8″ x 8″ |
3 5⁄8” x 7 5⁄8” x 7 5⁄8” |
226 |
4″ x 8″ x 16″ |
3 5⁄8” x 7 5⁄8” x 15 5⁄8” |
113 |
6″ CMU |
Size D x H x W |
Nominal D x H x W |
Blocks per 100 ft2 |
6″ x 8″ x 8″ |
5 5⁄8” x 7 5⁄8” x 7 5⁄8” |
226 |
6″ x 8″ x 16″ |
5 5⁄8” x 7 5⁄8” x 15 5⁄8” |
113 |
8″ CMU |
Size D x H x W |
Nominal D x H x W |
Blocks per 100 ft2 |
8″ x 8″ x 8″ |
7 5⁄8” x 7 5⁄8” x 7 5⁄8” |
226 |
8″ x 8″ x 16″ |
7 5⁄8” x 7 5⁄8” x 15 5⁄8” |
113 |
10″ CMU |
Size D x H x W |
Nominal D x H x W |
Blocks per 100 ft2 |
10″ x 8″ x 8″ |
9 5⁄8” x 7 5⁄8” x 7 5⁄8” |
226 |
10″ x 8″ x 16″ |
9 5⁄8” x 7 5⁄8” x 15 5⁄8” |
113 |
12″ CMU |
Size D x H x W |
Nominal D x H x W |
Blocks per 100 ft2 |
12″ x 8″ x 8″ |
11 5⁄8” x 7 5⁄8” x 7 5⁄8” |
226 |
12″ x 8″ x 16″ |
11 5⁄8” x 7 5⁄8” x 15 5⁄8” |
113 |
14″ CMU |
Size D x H x W |
Nominal D x H x W |
Blocks per 100 ft2 |
14″ x 8″ x 8″ |
13 5⁄8” x 7 5⁄8” x 7 5⁄8” |
226 |
14″ x 8″ x 16″ |
13 5⁄8” x 7 5⁄8” x 15 5⁄8” |
113 |
This calculator will estimate the required volume of mixer to pour for a concrete slab.