23/08/2025
How to Calculate the Number of Blocks per Square Meter
To estimate blocks for your wall, follow these steps:
Step 1: Understand the Base Measurement
• 1 square meter = 1 m × 1 m.
• For example:
• 1 m × 1 m = 1 m²
Step 2: Take a Practical Measurement on Site
• Go to where blockwork is exposed.
• Use a plumb and tape to mark 1 meter vertically and 1 meter horizontally.
• Complete the square to form 1 m × 1 m.
Step 3: Count the Blocks Within That 1 m² Area
• When you count, you will find approximately 9 blocks and some fraction.
• For calculation, round it to 10 blocks per square meter.
Step 4: Calculate the Total Wall Area
• Find the total wall area by multiplying the length and height of each wall.
• Example:
• Wall 1: 3 m × 3 m = 9 m²
• Wall 2: 2 m × 2 m = 4 m²
• Add up all walls to get the total square meters.
Step 5: Multiply by 10
• Multiply the total square meters by 10 (the approximate number of blocks per m²).
• This gives the total blocks needed.
• Note: This is an approximate figure, not exact. You may not need to add much waste.
With this method, you can estimate blocks for any building quickly and practically.
I’m Wole, the Practical Builder. I’ll be back with more tips for you.
