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Concrete and Cinder Block Calculator

Block length mm
Block height mm
Block width
Block calculator
Average height cwall m
Length cwall m
Thickness cwall mm
Area of openings
Block volume with 5% allowance% {{V}} m3
Number of blocks with 5% allowance% {{N}} pcs.


This online Concrete and Cinder Block Calculator helps you accurately determine the number of blocks required for constructing the walls of your house or other structures. The tool enables you to calculate both by piece count and by volume, streamlining the process of planning and purchasing construction materials.

Main features of the calculator:

  • Input block dimensions (length, width, height).
  • Enter wall parameters (length and average height).
  • Account for openings such as windows and doors.
  • Automatically round the block count to whole numbers.
  • Add a 5% margin to cover potential material loss during construction.

To use the calculator, follow these steps:

  1. Enter the dimensions of the blocks you plan to use.
  2. Specify the wall parameters (height and length).
  3. Add the total area of window and door openings, if applicable.
  4. Click the "Calculate" button to view the result.

The calculation result will be displayed below the button in an easy-to-read format. This calculator is suitable for all types of construction blocks, including concrete and cinder blocks, aerated blocks, foam blocks, and more. It is an essential tool for professionals and DIY enthusiasts alike who want to accurately estimate material requirements and avoid unnecessary expenses.

Don’t forget to share the calculator with colleagues or friends if you find it useful!