How Many Cinder Blocks for a 10-Foot Wall, 4 Feet High?
For a 10 ft long, 4 ft high concrete block wall, you need about 48 blocks (8×8×16 blocks (+5% waste)). Also: wall area: 40.0 ft²; 80-lb bags of mortar mix (about): 2 bags.
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| Wall area | 40.0 ft² |
|---|---|
| 80-lb bags of mortar mix (about) | 2 bags |
How this number is calculated
Wall area = 10 × 4 = 40.0 sq ft. A nominal 8×8×16 block covers 8/9 sq ft with its mortar joint, so you need 1.125 blocks per sq ft: 45.0 blocks, plus 5% waste = 48.
Nearby sizes
| Size | 8×8×16 blocks (+5% waste) |
|---|---|
| a 10 ft long, 3 ft high concrete block wall | 36 blocks |
| a 10 ft long, 5 ft high concrete block wall | 60 blocks |
| a 10 ft long, 6 ft high concrete block wall | 71 blocks |
| a 10 ft long, 2 ft high concrete block wall | 24 blocks |
Tips
- Walls taller than a few feet usually need rebar and grout in the cores; those are not counted here.
- Check local code for footing and height limits before building a freestanding wall.
- A standard nominal block is 8 in tall and 16 in long, which gives 1.125 blocks per square foot.
Frequently asked questions
How much concrete blocks do I need for a 10 ft long, 4 ft high concrete block wall?
For a 10 ft long, 4 ft high concrete block wall, you need about 48 blocks (8×8×16 blocks (+5% waste)). Also: wall area: 40.0 ft²; 80-lb bags of mortar mix (about): 2 bags.
How is the quantity for a 10 ft long, 4 ft high concrete block wall calculated?
Wall area = 10 × 4 = 40.0 sq ft. A nominal 8×8×16 block covers 8/9 sq ft with its mortar joint, so you need 1.125 blocks per sq ft: 45.0 blocks, plus 5% waste = 48.
How much does concrete blocks for a 10 ft long, 4 ft high concrete block wall cost?
Using rough planning prices (per standard 8×8×16 block (before mortar and labor)), the material for a 10 ft long, 4 ft high concrete block wall comes to about $76.80 to $168. Prices vary by region and supplier, so get a local quote.