Calculate exactly how many bricks, cement bags, and sand you need for any wall. Enter your wall dimensions below for an instant material estimate.
🧱 Brick Calculator
Wall material estimate — bricks, cement & sand
📋 Calculation Details
Includes 5% wastage. Standard brick 9×4.5×3 in. Verify with your site engineer.
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Frequently Asked Questions
How many bricks per square foot for a 9-inch wall?
Approximately 13.5 bricks per cubic foot, which works out to about 10-11 bricks per square foot of 9-inch wall face including mortar.
What is the standard brick size in Pakistan/India?
The standard brick size is 9 x 4.5 x 3 inches (228 x 114 x 76 mm).
How much cement for 1000 bricks?
For a 9-inch wall with 1:6 mortar, approximately 3 cement bags (50kg) are needed per 1000 bricks.
What does “Dry Mortar” mean in the calculation?
Dry mortar is the volume of cement and sand before water is added. Wet mortar (cement + sand + water) occupies less volume than the dry ingredients separately, so we multiply by 1.33 to get the dry volume needed.
Why is wastage added separately?
Bricks break during transport and cutting. The calculator shows net bricks required, then adds your wastage percentage (default 5%) to give the order quantity. Always order the wastage-included quantity.
What mortar ratio should I use?
1:6 (1 part cement, 6 parts sand) is standard for brick masonry in Pakistan/India. Use 1:4 for stronger work or exposed walls. The calculator lets you enter any ratio.
How do I enter 6 feet 10 inches?
Select “Feet” unit, then enter 6 in the Length (ft) field and 10 in the Length (inch) field. The calculator combines them automatically (6.83 ft).
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How to Use This Brick Calculator
- Enter wall length and height — use the feet/inch split fields (e.g. 6 ft 10 in) for exact site measurements.
- Select wall thickness — 4.5-inch (single brick partition) or 9-inch (double brick load-bearing) are standard.
- Set the mortar ratio — 1:6 is standard for brick masonry in Pakistan/India; 1:4 for stronger or exposed work.
- Add wastage % — 5% default covers breakage in transport and cutting.
- Deduct doors/windows — enter their total area in sq ft so you don’t buy bricks for empty space.
- Read results: bricks required (with wastage), cement bags, sand in cubic feet, and mortar volume.
Practical note: The calculator uses the standard Pakistani brick size 9 × 4.5 × 3 inches and the dry-mortar factor of 1.33. If your local bricks run small (kiln variation is real), bump wastage to 7–8%.
Brick Calculation — Step by Step
Step 1: Wall volume = Length × Height × Thickness (all in feet) → cubic feet
Step 2: Number of bricks = Wall volume × 13.5
(One cubic foot of 9-inch brickwork holds ~13.5 standard bricks including mortar joints.)
Step 3: Mortar volume = Wall volume × 0.30 → wet mortar in cubic feet
(About 30% of brickwork volume is mortar; the rest is bricks.)
Step 4: Dry mortar = Wet mortar × 1.33
(Dry cement + sand occupy more volume than the wet mixed mortar — the 1.33 factor accounts for this.)
Step 5: Cement and sand from the ratio. For 1:6 — cement = dry mortar × (1/7), sand = dry mortar × (6/7). Convert cement volume to bags: 1 bag (50 kg) = 1.25 cubic feet.
Step 6: Add wastage to the brick count.
Worked Example — 10 Ft × 10 Ft Wall, 9-Inch Thick, 1:6 Mortar
- Wall volume = 10 × 10 × 0.75 = 75 cu ft
- Bricks = 75 × 13.5 = 1,013 bricks → +5% wastage = 1,063 bricks
- Wet mortar = 75 × 0.30 = 22.5 cu ft → dry = 22.5 × 1.33 = 30 cu ft
- Cement = 30 × (1/7) = 4.29 cu ft = 3.4 bags → buy 4 bags
- Sand = 30 × (6/7) = 25.7 cu ft
So one 10×10 ft room wall (9-inch) needs roughly 1,060 bricks, 4 cement bags, and 26 cu ft of sand.
Standard Brick Sizes
| Region | Size (inches) | Size (mm) |
|---|---|---|
| Pakistan / India (standard) | 9 × 4.5 × 3 | 228 × 114 × 76 |
| Pakistan (kiln, nominal) | 9 × 4.5 × 2.75 | often undersized — measure! |
| UK standard | 8.5 × 4 × 2.5 | 215 × 102.5 × 65 |
| US modular | 7.6 × 3.6 × 2.25 | 194 × 92 × 57 |
On site: always measure 10 bricks from the delivered lot and average them. Kiln bricks vary — if they’re 8.5 inches instead of 9, your per-cubic-foot count changes.
Mortar Ratio Guide
| Ratio (cement:sand) | Use | Strength |
|---|---|---|
| 1:3 | Heavy load, foundations, exposed work | High |
| 1:4 | External walls, plaster in damp areas | Good |
| 1:6 | Standard brick masonry | Adequate |
| 1:8 | Partition walls, budget work | Low — avoid for structural |
Bricks Per Square Foot (Quick Reference)
| Wall thickness | Bricks per sq ft of wall face |
|---|---|
| 4.5-inch (single) | ~5–5.5 |
| 9-inch (double) | ~10–11 |
| 13.5-inch | ~15–16 |
Including mortar joints and 5% wastage.
Brick Quality Checks Before Ordering
Don’t just count bricks — check them. Reject the lot if:
| Test | Method | Accept |
|---|---|---|
| Size | Measure 10 bricks, average | 9 × 4.5 × 3 in (±3%) |
| Sound | Strike two bricks together | Clear ringing, not dull thud |
| Break | Drop from 1 m onto hard ground | Shouldn’t shatter |
| Water absorption | Soak 24 hrs, weigh gain | ≤ 20% of dry weight |
| Efflorescence | Soak, dry, inspect surface | No white salt patches |
On site we always test the delivered lot, not the sample the kiln owner showed us last week. A 5-minute check saves a wall that crumbles in two years.
Field Tips from Site
- Deduct openings before ordering. A door (21 sq ft) and two windows (30 sq ft) in a 9-inch wall save you ~500 bricks. That’s real money.
- Soak bricks before laying (submerge 2–4 hours). Dry bricks suck water from mortar, weakening the bond — the most common cause of crumbly joints I see on site.
- Frog up, always. The brick’s indentation (frog) faces up and gets filled with mortar — that’s what locks courses together.
- Check the mortar, not just the bricks. Weak 1:8 mortar in a 9-inch wall defeats the purpose of good bricks.
- Order 5% extra, stack on level ground, covered with tarp in rain. Waterlogged brick stacks breed algae and weaken the kiln face.
Frequently Asked Questions
How many bricks per square foot for a 9-inch wall?
Approximately 10–11 bricks per square foot of wall face, including mortar joints and 5% wastage.
What is the standard brick size in Pakistan/India?
9 × 4.5 × 3 inches (228 × 114 × 76 mm). Always verify — kiln bricks often run slightly under.
How much cement for 1000 bricks?
For a 9-inch wall with 1:6 mortar, about 3–4 cement bags (50 kg) per 1000 bricks, plus ~25 cu ft of sand.
What does “dry mortar” mean in the calculation?
Dry mortar is the volume of cement and sand before water is added. Wet mixed mortar compacts to less volume, so we multiply wet volume by 1.33 to get the dry ingredients needed.
Why is wastage added separately?
Bricks break in transport, unloading, and cutting. The calculator shows net bricks first, then adds your wastage % for the order quantity. Always order the wastage-included number.
What mortar ratio should I use?
1:6 is standard for brick masonry. Use 1:4 for external/exposed walls or heavier loads, 1:3 for foundations.
How do I enter 6 feet 10 inches?
Select “Feet” unit, enter 6 in Length (ft) and 10 in Length (inch). The brick calculator combines them (6.83 ft) automatically.
How many bricks in 1 cubic foot?
About 13.5 standard bricks per cubic foot of 9-inch brickwork, mortar joints included.
Final Thoughts
This brick calculator replaces thumb-rules with arithmetic: wall volume → bricks → mortar → cement and sand, each step checkable by hand. Measure your bricks, deduct your openings, soak before laying — and the wall builds itself to plan.
Written by Mohsin Raza Adil — BSc Civil Engineering Technologist (NTC-registered), Pakistan.