Concrete Block Calculator — Calculate Blocks Needed for Your Project

Concrete Block Calculator

Calculate how many concrete blocks you need for your construction project with our comprehensive calculator. Determine blocks, materials, and costs for walls and structures.

Step 1: Wall Specifications

Understanding Wall Dimensions

Standard concrete blocks are typically 20cm tall and 40cm long. Wall thickness can vary based on structural requirements and insulation needs.

Step 2: Block & Material Parameters

10mm
5%

About Mortar Joints

Mortar joints are typically 10mm thick. Thicker joints can affect the number of blocks needed as they reduce the effective coverage area of each block.

Block Calculation Results

Summary
Block Comparison
Breakdown

Total Blocks Required

325
For a 10m × 2.5m wall with standard blocks
Wall Area
25.0 m²
Blocks Without Wastage
310
Wastage Added
15 blocks
Mortar Needed
0.65 m³

Block Type Comparison

Block Type Dimensions Blocks Needed Wall Area

Block Calculation Breakdown

Block Calculation Formula

Blocks = (Wall Length / (Block Length + Mortar)) × (Wall Height / (Block Height + Mortar)) × Wall Thickness Factor

To calculate blocks needed: Divide wall dimensions by block dimensions (including mortar joints), then multiply the results and apply wastage percentage.

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