How Many Bricks Do I Need for My Brick Wall?
If you are about to start construction and want to optimize your costs, this brick calculator is your new best friend. The brick wall calculator helps you estimate how many bricks you need to cover a particular wall surface. Together with the brick mortar calculator feature, you can also estimate cement and sand quantities for your mortar.
How Do I Use the Brick Calculator?
Using the brick calculator is very easy. All you have to do is enter the values needed, and the results appear immediately.
- Select the unit system — Imperial (feet/inches) or Metric (meters/mm).
- Select the wall type — Single stack (one brick thick) or Double stack (two wythes with optional insulation).
- Enter wall dimensions — wall length and height (or use the total area).
- Choose a brick type — Standard US, King, Queen, Closure (Imperial), or Standard EU, Thin, Large (Metric). You can also enter custom dimensions.
- Set the mortar joint thickness — default is 3/8 in (Imperial) or ~10 mm (Metric).
- Enter wastage % — accounts for broken or unusable bricks. Typical value is 5–10%.
- Optional: Enter brick price and currency — to get the total material cost in your preferred currency (20 currencies supported).
The Brick Calculation Formula
The number of bricks required is calculated using:
Bricks = (L × H) / ((l + t) × (h + t))
Where:
- L — Length of the wall
- H — Height of the wall
- l — Length of a single brick
- h — Height of a single brick
- t — Thickness of the mortar joint
The result gives you the exact number of bricks. Applying the wastage percentage gives you the number of bricks to order — always buy a few extra to account for cuts and breakage.
Using the Brick Mortar Calculator Feature
Enable the mortar materials toggle to estimate how much cement and sand you will need. The calculator computes:
- Wet mortar volume — the total volume of joints in the finished wall.
- Dry volume — multiply by 1.3 to account for shrinkage during curing.
- Cement and sand quantities — based on your chosen mix ratio (1:3, 1:4, or 1:6).
- Number of cement bags — based on the bag size you specify.
The most common mix ratios are:
- 1:3 — strong mix for structural and below-grade work
- 1:4 — standard general-purpose mix
- 1:6 — lean mix for interior non-load-bearing walls
Supported Brick Types
| Type | System | Length × Height × Depth |
|---|---|---|
| Standard US | Imperial | 7⅝" × 2¼" × 3⅝" |
| King | Imperial | 9⅝" × 2⅝" × 3⅝" |
| Queen | Imperial | 9⅝" × 2¾" × 3" |
| Closure | Imperial | 7⅝" × 3⅝" × 3⅝" |
| Standard EU | Metric | 215 × 65 × 102.5 mm |
| Thin (Format WDF) | Metric | 240 × 52 × 115 mm |
| Large (2 DF) | Metric | 290 × 90 × 140 mm |
FAQs
How many bricks per square foot?
A brick wall needs approximately 6.75 bricks per square foot using standard US bricks (7⅝" × 2¼") with a 3/8" mortar joint. For standard metric bricks (215 × 65 mm) with a 10 mm joint, you need about 48 bricks per square meter.
How much wastage should I add?
We recommend adding 5% for simple rectangular walls and 10–15% for walls with many openings, curves, or cuts. Always order extra — returning unused bricks is far easier than waiting for a second delivery that may not match your original batch.
What is a double brick wall?
A double brick wall (cavity wall) consists of two parallel rows of bricks (wythes) with a gap between them, often filled with insulation. It uses roughly twice as many bricks as a single wall of the same dimensions.
What mortar mix should I use?
For most standard brick walls, a 1:4 (cement:sand) mix is appropriate. Use 1:3 for stronger structural or exposed-weather walls, and 1:6 for lightweight interior partitions.