Gross wall area
Wall length × height × quantity establishes the full face area.
Free South African brick calculator
Brick calculator.
Count wall by wall.
Estimate standard bricks, maxi bricks or concrete blocks, with openings deducted and practical allowances for waste, mortar, cement and sand.
Calculate bricks ↓52Standard bricks / m²
01Standard, maxi
or blocks
or blocks
02Single or
double skin
double skin
03Deducts doors
and windows
and windows
04Mortar and
cost allowance
cost allowance
01
Wall take-off
Measure the net wall area
Add identical walls with the quantity field. For mixed heights or gables, calculate each section separately and combine the totals.
02
The formula
Area, units, mortar
Keeping each part visible makes it easier to compare the result with the supplier’s own product data.
Deduct openings
Door, window and other large openings are removed before the unit rate is applied.
Apply unit rate
Units per m² depend on actual manufactured size and joint thickness.
Add waste
Cuts, breakages, corners and future matching stock require more than the clean count.
Before finishes
Plan plaster, paint and damp protection together.
A wall take-off is more useful when the complete build-up and moisture exposure are considered.
Calculate plaster →Good to know
Brick calculator FAQs
How many standard bricks are needed per square metre?+
A common South African planning rate is about 52 modular bricks per m² for a single skin with 10 mm joints. Actual brick dimensions and the specified bond must be confirmed.
What does double skin mean?+
A double-skin or two-leaf wall has two masonry faces. This calculator doubles the masonry face area, but it does not calculate cavity ties, reinforcement, insulation or structural details.
How much waste should I add?+
Ten percent is a practical starting point for straight walls. Complex bonds, many corners, cuts or fragile units may need more, while large repetitive work may be optimised by a proper take-off.
Is the mortar estimate exact?+
No. It uses an indicative mortar volume and 1:5 mix. Unit size, frogs, joint width, workmanship and batching change consumption, so the project specification must govern.