Mortar yield belongs to a masonry layout
Mortar bag counts depend on the units and joints being laid. A stated number of standard bricks per bag cannot be transferred directly to a different brick size, block type or joint thickness. This calculation uses a matching units-per-bag yield.
Measure and calculate
- Count the masonry units in the job.
- Enter the number of those units laid by one bag under the product’s stated conditions.
- Round the quotient upward, then consider any separately planned handling allowance.
Bags = ceiling(number of masonry units ÷ matching units-per-bag yield).
A worked example
- Inputs
- The example uses 100 standard bricks and an 80 lb mortar bag yield of up to 37 standard bricks with 3/8 in joints.
- Calculation
100 ÷ 37 = 2.7027; whole-bag rounding gives 3 bags.- Result
- 3 bag
Three bags is the arithmetic estimate using the stated yield. Different joints, waste or masonry geometry can change real consumption.
Read the result
| Output or check | What it means for your project |
|---|---|
| Whole mortar bags | The unit count is divided by matching units-per-bag yield. A partial bag requirement is rounded up for purchase. |
| Matching yield | A yield for different unit sizes or joint geometry is not interchangeable. Check the actual product and planned masonry work. |
Common questions
Does a 60 lb bag have the same yield as an 80 lb bag?
Do not assume so. Match the yield to the exact bag weight and product specification.
Does this count the bricks I need?
No. Supply the unit count from a separate masonry takeoff. This tool converts that count into a mortar quantity.