About this tool
Net wall area, block count with joints and waste, plus a mortar volume estimate.
Net = L·H − openings; blocks = ceil(net/face·(1+waste)); mortar = net·t − blocks·block volume.
Formula: n = ceil(A_net / ((bl + j)·(bh + j)) · (1 + waste))
Example: Wall length (m) = 10, Wall height (m) = 3, Openings (m²) = 4, Block length (mm) = 400, Block height (mm) = 200, Mortar joint (mm) = 10 → Blocks to order = 318, Net area (m²) = 26.
Mortar is a volume estimate with the stated joint; no bedding method, wastage or bond pattern is assumed.
Quick steps
- Enter your values — every field shows its unit.
- Press Calculate (or Try an example to see how it works).
- Read the results and copy them if you need them elsewhere.
The calculation runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Blockwork & Wall Quantity work?
Net = L·H − openings; blocks = ceil(net/face·(1+waste)); mortar = net·t − blocks·block volume.
What should I keep in mind?
Mortar is a volume estimate with the stated joint; no bedding method, wastage or bond pattern is assumed.
Is my data sent anywhere?
No. The numbers stay on your device; the page only shows the result.