Brick Calculator

Calculate the number of bricks, mortar volume and estimated brick cost required for a wall based on its dimensions, brick size, mortar joints and openings.

Wall & Brick Inputs

1. Wall Dimensions

straighten Wall Length

height Wall Height

line_weight Wall Thickness

Standard 9 in (double brick) or 4.5 in (single partition).

2. Doors & Windows Openings

door_front Doors (2 @ 3×7 ft = 42 sq.ft)

window Windows (3 @ 4×4 ft = 48 sq.ft)

Total Opening Area Deduction: 90 sq. ft.

3. Brick Dimensions & Mortar Joint

dashboard Common Brick Size Preset

aspect_ratio Brick (L × W × H)

× ×

border_style Mortar Joint Thickness

Standard masonry mortar joint thickness is 10 mm (3/8 inch).

shield Wastage & Breakage Allowance

15%

4. Brick Pricing & Budget

payments Brick Price per Unit

₹

Bricks Required

MORTAR: 19.1 CU.FT

947 Bricks

Bricks Before Wastage: 902 Bricks (includes 5.0% breakage buffer). Estimated Brick Cost: ₹ 8,523 (Priced at ₹ 9.00 / brick).

NOTE:

Opening deductions exceed total wall area. Please check door and window dimensions.

Bricks Required

947 Bricks

Wastage: +45 Bricks

Net Wall Volume

82.5 cu.ft

Ded: -67.5 cu.ft

Estimated Brick Cost

₹ 8,523

Rate: ₹ 9.00 / brick

Mortar Volume

19.1 cu.ft

Mortar Share: 23.1%

Gross Wall Volume

150.0 cu.ft

20 × 10 ft (9 in thick)

Brick + Mortar Module

0.0915 cu.ft

Joint: 10 mm

Waterfall & Brick Calculation

1. Gross Wall Volume (20 × 10 ft × 9 in) 150.0 cu.ft

2. Doors & Windows Deduction (90 sq.ft × 9 in) -67.5 cu.ft

                        3. Net Brickwork Wall Volume
                        82.5 cu.ft
                    

4. Brick Module (9.39 × 4.89 × 3.39 in) 0.0915 cu.ft / brick

5. Theoretical Bricks Before Wastage 902 Bricks

6. Wastage & Breakage Buffer (5%) +45 Bricks

                        Final Bricks Required
                        947 Bricks
                    

Brick Estimation Insights

ℹ️ Mortar Joint Influence: A 10 mm mortar joint expands the effective brick module volume by ~30%, reducing the total brick requirement.
ℹ️ Estimated Mortar Volume: Mortar fills approximately 19.1 cu.ft (23.1%) of total net wall volume.

tips_and_updates

Order 5% Extra for Transportation Breakage: Red bricks are susceptible to chipping and breakage during unloading and masonry cutting. Always order a 5% buffer from the same kiln batch to ensure color uniformity.

This calculator provides an estimate based on wall dimensions, opening deductions, brick dimensions, mortar joint thickness and wastage assumptions. Actual brick and mortar requirements can vary based on brick tolerances, bond pattern, wall intersections, cutting, workmanship and site conditions. Verify quantities against project drawings and the actual brick manufacturer's dimensions before ordering materials.

How to Calculate Bricks Required

Estimating bricks for a wall requires calculating net wall volume, determining the effective unit volume of a single brick including mortar joint, and applying a breakage wastage allowance.

Step 1

Gross Wall Volume

Multiply Length × Height × Thickness to get the total gross 3D wall volume.

Step 2

Deduct Openings

Subtract the combined 3D volume of doors and windows (Opening Area × Wall Thickness).

Step 3

Brick Module Volume

Add mortar joint thickness (10 mm) to length, width, and height of the brick: (L+J) × (W+J) × (H+J).

Step 4

Divide & Add Wastage

Divide Net Wall Volume by Brick Module Volume, then add 5% to 10% wastage for site breakage.

How Is Mortar Estimated?

The calculator estimates theoretical mortar volume by comparing total net wall volume with the volume occupied by dry bricks:

Mortar Volume = Net Wall Volume − (Bricks Required × Actual Brick Volume without Mortar)

Mortar typically accounts for 20% to 25% of the total brickwork volume in standard 9-inch brick walls.

Frequently Asked Questions

How many bricks are needed for a 9-inch wall of 100 sq. ft.?

For a 9-inch thick wall of 100 sq. ft. using standard 9x4.5x3 in red bricks and 10mm mortar joint (with 5% wastage), you need approximately 1,148 bricks.

How is mortar volume calculated in brickwork?

Mortar volume is calculated by subtracting the actual volume of dry bricks from the net wall volume.

What is the standard size of a red brick in India?

The standard nominal size of a modular red brick in India is 9 × 4.5 × 3 inches (or 225 × 112.5 × 75 mm).