DIY & materials
Masonry mortar volume Calculator
Estimate bed and vertical joint volume in solid masonry. This free masonry mortar volume calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Estimate bed and vertical joint volume in solid masonry.
Calculated outcomes
- Mortar Volume M3
- 0.1379 m³
- Mortar Fraction Percent
- 6.57%
Assumptions and estimates
- Method: Mortar fraction = 1 − solid face area ÷ joint module face area. Multiply by wall area and depth, then waste.
- Assumes full-depth joints and solid rectangular units. Hollow blocks, frogs, bedding practices and thin-joint systems alter usage.
Useful next steps
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the masonry mortar volume calculation works
Mortar fraction = 1 − solid face area ÷ joint module face area. Multiply by wall area and depth, then waste.
Assumes full-depth joints and solid rectangular units. Hollow blocks, frogs, bedding practices and thin-joint systems alter usage.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review order volume m3 and order litres, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Net wall area (m²)
- 21
- Unit length (mm)
- 440
- Unit height (mm)
- 215
- Unit depth (mm)
- 100
- Mortar joint (mm)
- 10
- Waste allowance (%)
- 15
- Order Volume M3
- 0.1586 m³
- Order Litres
- 158.61 L