How Many Bricks for a 100 Square Foot Wall?
Quick Answer
A 100 square foot wall requires approximately 700 standard modular bricks (with 10% waste) and 7 bags of pre-mixed mortar.
- Standard modular bricks: 6.75 per sq ft → 675 + 10% waste = 743 bricks
- King-size bricks: 4.5 per sq ft → 450 + 10% waste = 495 bricks
- Mortar: ~7 bags of 80-lb pre-mixed mortar
- Total material cost: $400–$900 depending on brick type
Formula
Standard modular bricks (3⅝" × 2¼" × 8") with ⅜" mortar joints cover about 6.75 bricks per square foot. Add 10% for cuts and breakage.
Step-by-Step Calculation
- 1
Wall area
100 sq ft (e.g. 10 ft wide × 10 ft high)
- 2
Bricks needed (modular)
100 × 6.75 = 675 bricks
- 3
Add 10% waste
675 × 1.10 = 742.5 → order 743 bricks
- 4
Mortar
100 sq ft ÷ 15 sq ft per bag = 6.7 → 7 bags
Brick Count by Type for 100 Sq Ft
| Brick Type | Size | Per Sq Ft | Needed (10% waste) | Cost* |
|---|---|---|---|---|
| Standard Modular | 3⅝×2¼×8" | 6.75 | 743 | $370–$740 |
| King Size | 3⅝×2¾×10" | 4.50 | 495 | $300–$600 |
| Queen Size | 3⅛×2¾×8" | 5.76 | 634 | $320–$630 |
| Concrete Block (8×16) | 8×8×16" | 1.125 | 124 | $150–$250 |
*Brick prices range from $0.50–$1.00 each for standard to $1.00–$2.50 for premium/face brick.
Frequently Asked Questions
How much mortar per 100 bricks?
You need about 1 bag (80 lb) of pre-mixed mortar per 100 standard bricks. So for 743 bricks on a 100 sq ft wall, plan on 7–8 bags of mortar.
How long does it take to lay 100 sq ft of brick?
An experienced mason lays about 400–500 bricks per day. A 100 sq ft wall (743 bricks) takes a skilled mason about 1.5–2 days. DIYers should plan for 3–5 days.
How much does brick installation cost per sq ft?
Professional brick installation costs $10–$25 per sq ft including materials and labor. For a 100 sq ft wall, expect $1,000–$2,500 total installed.