Brick and Mortar Estimator
The estimate uses the brick module including a mortar joint to calculate face coverage. It then compares the gross wall volume with the nominal volume of the bricks to approximate the mortar volume.
How to use this calculator
- Use consistent metric dimensions and enter the finished wall face area.
- Check that units, denominator definitions and time periods are consistent before comparing scenarios.
- Run a second scenario when an assumption is uncertain.
Formula used by brick mortar estimator calculator
Brick modules per m² ≈ 1 / ((brick length + joint) × (brick height + joint)); mortar volume ≈ gross wall volume − nominal brick volume, then add waste.
- Brick modules per m² ≈ 1 / ((brick length + joint) × (brick height + joint)); mortar volume ≈ gross wall volume − nominal brick volume, then add waste.
- Bond patterns, cuts, openings and supplier packaging can change the order quantity. Verify with the masonry specification or supplier before ordering.
- The tool performs arithmetic on the values entered and does not validate assumptions against outside records.
Worked examples
Worked example
20 m² of wall, 100 mm thick, using 190 × 90 × 90 mm bricks with 10 mm joints and 7% waste.
Approximately 1,070 bricks including waste; mortar volume is estimated from wall volume minus brick volume, then adjusted for waste.
Estimated quantities use the dimensions and assumptions entered.
Understanding the result
The estimate uses the brick module including a mortar joint to calculate face coverage. It then compares the gross wall volume with the nominal volume of the bricks to approximate the mortar volume.
Bond patterns, cuts, openings and supplier packaging can change the order quantity. Verify with the masonry specification or supplier before ordering.
Important notes
Bond patterns, cuts, openings and supplier packaging can change the order quantity. Verify with the masonry specification or supplier before ordering.
Treat this output as an estimate tied to the stated inputs. For regulated, safety-critical, tax or professional decisions, verify applicable official guidance and specifications.
Frequently asked questions
Does the wall area include windows and doors?
Subtract openings from the face area before entering it.
Is the mortar result a mix recipe?
No. It estimates volume, not cement/sand mix proportions or structural suitability.
How should I interpret the result?
Bond patterns, cuts, openings and supplier packaging can change the order quantity. Verify with the masonry specification or supplier before ordering.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.