Calculator Inputs
Example Data Table
| Parameter | Example Value |
|---|---|
| Wall length | 5.00 m |
| Wall height | 3.00 m |
| Wall thickness | 230 mm |
| Total openings area | 2.00 m² |
| Brick size | 190 × 90 × 90 mm |
| Joint thickness | 10 mm |
| Mix ratio | 1 : 5 |
| Dry volume factor | 1.33 |
| Wastage | 5% |
| Net wall volume | 2.990 m³ |
| Rounded brick count | 1,495 bricks |
| Dry mortar volume | 0.962 m³ |
| Cement required | 230.99 kg |
| Recommended cement bags | 5 bags |
| Sand required | 0.802 m³ |
| Estimated water | 115.50 liters |
Formula Used
This calculator estimates mortar by comparing the total brickwork volume with the solid brick volume, then converts that mortar into cement and sand quantities.
Gross Wall Volume = Wall Length × Wall Height × Wall Thickness
Openings Volume = Total Openings Area × Wall Thickness
Net Wall Volume = Gross Wall Volume − Openings Volume
Nominal Brick Volume = (Brick Length + Joint) × (Brick Height + Joint) × (Brick Width + Joint)
Exact Brick Count = Net Wall Volume ÷ Nominal Brick Volume
Wet Mortar Volume = Net Wall Volume − (Exact Brick Count × Actual Brick Volume)
Wet Mortar with Wastage = Wet Mortar Volume × (1 + Wastage %)
Dry Mortar Volume = Wet Mortar with Wastage × Dry Volume Factor
Cement Volume = Dry Mortar Volume × Cement Part ÷ Total Parts
Sand Volume = Dry Mortar Volume × Sand Part ÷ Total Parts
Cement Weight = Cement Volume × 1440 kg/m³
Cement Bags = Cement Weight ÷ Bag Weight
Water Estimate = Cement Weight × Water-Cement Ratio
The water result is an estimate. Site moisture, brick absorption, and workability needs can change actual water demand.
How to Use This Calculator
- Enter wall length and wall height in meters or feet.
- Enter wall thickness, brick dimensions, and joint thickness in one masonry unit.
- Add the total openings area to deduct doors, windows, or gaps.
- Choose the mortar mix ratio, such as 1:4, 1:5, or 1:6.
- Set the dry volume factor, wastage, bag weight, water ratio, and sand density.
- Press calculate to view results, then export the report as CSV or PDF.
Frequently Asked Questions
1. What does this brickwork mortar calculator estimate?
It estimates net wall volume, number of bricks, wet mortar, dry mortar, cement, sand, cement bags, and water. It also deducts openings and adds wastage for a more practical material estimate.
2. Why does the calculator use a dry volume factor?
Dry ingredients occupy more volume before mixing and compaction. The dry volume factor adjusts wet mortar volume to estimate how much loose cement and sand are needed on site.
3. What mortar ratio should I use for brickwork?
Common site ratios include 1:4, 1:5, and 1:6 cement to sand. The right ratio depends on structural needs, local practice, brick quality, and the engineer’s or project specification.
4. Why are exact bricks and rounded bricks both shown?
Exact bricks come from the raw calculation. Rounded bricks give a practical whole-number quantity for ordering. Procurement usually needs the rounded value, often with an extra site allowance.
5. Does the water result represent final mixing water?
No. It is an estimate based on the selected water-cement ratio. Actual water can change because of sand moisture, weather, brick absorption, and the required workability during laying.
6. Can I use this calculator for hollow blocks or AAC units?
You can adapt it only if the dimensions and mortar assumptions match your unit type. For hollow or lightweight masonry, a dedicated block calculator is usually more reliable.
7. Why should openings be deducted?
Doors, windows, and service gaps reduce the actual brickwork volume. Deducting openings prevents overestimating mortar, cement, sand, and brick quantities for the wall section.
8. Should I still add a procurement margin after calculation?
Yes. Delivery losses, breakage, workmanship, and small design adjustments can affect final usage. Many teams still add a controlled procurement margin after reviewing the estimate.