🧱 CHB / Hollow Block Calculator

Calculate CHB blocks, cement, and sand for any wall — Philippines 2026

Wall Details
CHB Blocks Needed
0 pcs
Wall Area
0 sqm
Cement Bags
0 bags
Sand (cu.m.)
0 cu.m.
Detailed Breakdown
Gross Wall AreaLength × Height
0 sqm
Door DeductionStandard door: 0.8m × 2.1m = 1.68 sqm each
0 sqm
Window DeductionStandard window: 1.2m × 1.0m = 1.2 sqm each
0 sqm
Net Wall Area
0 sqm
CHB per sqmAccounting for mortar joints
0 pcs
Base CHB count
0 pcs
Wastage Addition
0 pcs
Total CHB (final)Including wastage
0 pcs
Estimated CHB CostAt ₱18/piece
₱0
Mortar Materials (approximate)
Portland Cement1 bag per ~0.3 cu.m. mortar
0 bags
Washed Sand0.5 cu.m. per bag of cement
0 cu.m.
Gravel (if concrete mix)
Not required

Standard CHB sizes: 4"×8"×16", 6"×8"×16", 8"×8"×16". Coverage varies by mortar joint thickness (typically 10–12mm). Always add 5–10% extra for breakage. Consult your mason or structural engineer for load-bearing walls.

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