Brick masonry calculator
Estimate the number of bricks, cement bags and sand for any wall — from its length, height and thickness, using the Nepal-standard 230 × 110 × 55 mm brick and a 10 mm mortar joint.
Choose a half-brick or full-brick wall, pick a 1:4 or 1:6 mortar mix, and add a wastage allowance. A material-take-off tool for planning your order, computed in your browser.
Wall & brick details
Total length of the wall.
Floor-to-top height of masonry.
Nepal standard ≈ 230 × 110 × 55 mm; sizes vary by maker.
10 mm joint assumed. 1:6 is typical for general brickwork.
Breakage and cutting allowance — usually 5–10%.
Enter a per-brick price to estimate cost.
Bricks required (incl. wastage)
3,871
3,686 before 5% wastage
Wall volume
6.90 m³
Cement
10 bags
Sand (m³)
2.02 m³
Sand (cft)
71.3 cft
Dry mortar
2.36 m³
| Wall volume | 10 × 3 × 0.23 = 6.900 m³ |
| Brick + 10 mm joint | (230+10) × (110+10) × (55+10) mm |
| Bricks (raw) | 3,686 pcs |
| Wet mortar | 1.771 m³ |
| Dry mortar (×1.33) | 2.356 m³ |
| Cement (1:6) | 0.337 m³ → 10 bags |
| Sand | 2.019 m³ = 71.3 cft |
A material-take-off estimate. Actual quantities depend on the real brick size, joint thickness, the bond used, openings (doors and windows are not deducted here), and site workmanship. Standard brick sizes vary by region and maker, so confirm dimensions before ordering. Cement is taken at 1,440 kg/m³ (50 kg bags) and a 1.33 dry bulking factor.
From wall dimensions to a bill of materials
Bricks come from the wall volume divided by one brick plus its mortar joint; the leftover volume is mortar, which then splits into cement and sand by your mix ratio.
Brick count
Wall volume ÷ (brick + 10 mm joint on each face). A 230 mm brick with a 10 mm joint occupies 240 × 120 × 65 mm of wall.
Mortar volume
Wall volume minus the solid brick volume gives the wet mortar; multiply by 1.33 for the dry volume, since mortar bulks when mixed.
Cement & sand
Split the dry mortar by the ratio — 1 part cement to 4 or 6 parts sand. Cement at 1,440 kg/m³ converts to 50 kg bags.
Brickwork, answered
How many bricks do I need for a wall?+
Divide the wall volume (length × height × thickness) by the volume of one brick plus its mortar joint. With a Nepal-standard 230 × 110 × 55 mm brick and a 10 mm joint, one full-brick (230 mm) wall needs roughly 95–100 bricks per square metre of wall face before wastage. This calculator does the exact figure from your dimensions.
What is the standard brick size in Nepal?+
The most common machine-made and kiln brick in Nepal is about 230 × 110 × 55 mm (close to the Indian/IS modular family). Sizes vary between makers and regions, so the calculator lets you enter the exact length, width and height — confirm the size on site before ordering.
How much cement and sand does brickwork need?+
First find the mortar volume = wall volume − volume occupied by the bricks. Multiply by 1.33 to get the dry volume (mortar bulks when wet), then split by the mix ratio. For 1:6, one part is cement and six parts sand; cement is taken at 1,440 kg/m³ in 50 kg bags. The tool reports cement in bags and sand in both m³ and cft.
What is the difference between a half-brick and a full-brick wall?+
A half-brick (115 mm) wall is one brick laid on its side — used for partitions and non-load-bearing walls. A full-brick (230 mm) wall is the brick's full length thick and is used for load-bearing or external walls. A thicker wall needs proportionally more bricks and mortar.
Why add a wastage allowance?+
Bricks break during transport and cutting, and some mortar is lost. A 5–10% wastage allowance covers this. The headline figure already includes the percentage you set, so order at least that many.
Does this deduct doors and windows?+
No. The estimate is for solid wall area, so it is slightly conservative for walls with openings. For a tighter figure, subtract the door and window areas from the wall area before entering the dimensions.
Sources & data note
Based on standard masonry take-off practice: bricks = wall volume ÷ (brick + 10 mm joint), mortar = wall volume − brick volume, dry mortar = wet × 1.33, then split by the mix ratio with cement at 1,440 kg/m³ in 50 kg bags. Standard brick sizes vary by region and maker; openings are not deducted. These figures are indicative — verify the actual brick size, mortar specification and current material rates before ordering.