Concrete Block Calculator
Estimate blocks, mortar, cement, sand & cost
Number of blocks = (Wall Area) / (Block Area). Mortar & materials are approximations for planning.
Blocks Required
Mortar Volume (m³)
Cement (bags)
Sand (m³)
Concrete Block Calculator
Estimate Blocks, Cement, Sand, and Cost
Wall Dimensions
Block Dimensions
Cost Calculation
Results
Project Summary
How the Calculation Works
Sand Volume = Mortar Volume × 0.8
🧱 Cement Block Calculator | Estimate Blocks, Mortar, Cement & Sand
Our Cement Block Calculator helps builders, contractors, and homeowners quickly estimate the number of blocks, cement, sand, and mortar required for any construction project. Whether you’re building a wall, foundation, or boundary, this calculator ensures accuracy, saves time, and minimizes material waste.
Try it below and get instant results for your next project.
🧮 How the Cement Block Calculator Works
The calculator uses standard engineering formulas to determine the number of cement blocks and mortar materials based on your wall’s size and block dimensions.
Formula 1: Wall Area
Wall Area = Length × Height
Formula 2: Block Area
Block Area = Block Length × Block Height
Formula 3: Number of Blocks
Total Blocks = Wall Area ÷ Block Area
You can also include:
- Mortar thickness (typically 10–12 mm)
- Wastage factor (usually 5–10%)
- Cement and sand ratio (commonly 1:5)
⚙️ Example Calculation
Example:
Wall size = 20 ft × 10 ft
Block size = 16 in × 8 in
Mortar thickness = 0.5 in
Result → About 180 cement blocks, 1.5 bags of cement, and 0.2 m³ sand required.
📏 Why Use Our Cement Block Calculator?
- ✅ Precision: Get accurate block counts and mortar ratios.
- ✅ Material Planning: Avoid shortages or waste.
- ✅ Cost Control: Add cost inputs for total estimate.
- ✅ Local Optimization: Metric & imperial units supported (ft/m, in/cm).
🧠 Construction Insights
This calculator is based on civil engineering standards and ASTM C90 / BS 6073 block specifications. Mortar mix ratios follow 1:5–1:6 cement-sand proportions recommended by structural engineers.
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For users in Pakistan, India, UAE, USA, and UK, this calculator adapts perfectly to regional block sizes, cement grades, and local measurement systems.
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- Asphalt Tonnage Calculator
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🌐 External Reference Links
- ASTM C90 – Standard for Concrete Masonry Units
- The Constructor – Blockwork Masonry Guide
- Engineering Civil – Mortar Mix Ratios
💬 Frequently Asked Questions (FAQs)
1️⃣ What is a cement block calculator used for?
It estimates how many blocks, cement bags, and sand you need for a wall based on your project’s dimensions.
2️⃣ What is the standard size of a cement block?
Common size: 16 in × 8 in × 8 in (or 400 mm × 200 mm × 200 mm), varying by region.
3️⃣ How thick should the mortar be?
Usually 10–12 mm (0.4–0.5 in) for stable joints.
4️⃣ What is the cement-sand ratio for blockwork?
Most commonly 1:5 or 1:6 mix ratio, depending on block type.
5️⃣ Can this calculator estimate cost?
Yes. Add prices for blocks, cement, and sand to calculate total cost automatically.
6️⃣ Is this calculator suitable for Pakistan or UAE?
Yes. Supports both feet/meters and inches/cm, making it accurate for South Asian and Middle Eastern standards.
🧩 Ready to Build?
Use the Cement Block Calculator now to plan your next wall or construction project with confidence.
👉 Visit AsphaltCalcApp.com for more free construction calculators and tools.