MetandumFREE TOOLS. NO SUBSCRIPTION.Find a calculator ⌕My projects
MEASURE ONCE. PLAN YOUR PURCHASE.

Mortar Mix Bags calculator.

Convert the known mortar space in masonry segments into whole bags by product yield.

MASONRY

Your inputs

Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.

Where to get this value

Use the usable coverage or mixed yield printed on your product label for the stated application. Do not substitute bag weight for finished volume.

Shortcuts only; choose your own allowance above.
Where to get this value

Enter your own allowance. Presets are input shortcuts, not a construction recommendation.

Masonry segment 1
Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Where to get this value

Measure only the area, length or quantity to deduct, in the unit shown. Keep this consistent with the surface being calculated.

Quantity and planning estimate
YOUR ESTIMATE
∑

A clear estimate starts here.

Enter your dimensions and product details to see the quantity and purchase breakdown.

CONTINUE YOUR PLAN

Find the next material.

Keep the quantity, then use another tool for the remaining parts of your purchase.

Explore all calculators
Formula and assumptions
BEHIND THE NUMBERS

How this calculation works.

Enter actual installed solid masonry volume, excluding mortar and openings. For hollow units, specify the intended filled space in your own volume data; this tool does not choose grouting or reinforcement.

Mortar volume = Σ(net wall volume − installed solid unit volume)Calculated with normalised units

A worked example

Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.

Mixed mortar yield per bag
20 L/bag
Waste allowance
10 %
Masonry segment 1
Wall length
2 m
Wall height
1 m
Specified masonry depth
200 mm
Opening area
0 m²
Installed solid unit volume
0.3 m³

Mortar bags to purchase: 6 bags

Before you purchase

Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.

Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.

Check your purchase assumptions

Do not treat a hollow masonry unit as a solid mortar deduction

Keep the project moving.

Explore masonry
MasonryBrick Quantity Calculator

Count bricks in wall faces from the selected brick module, openings and specified leaves.

MasonryMasonry Block Quantity Calculator

Separate standard units and specified corner units in a block wall purchase count.

Connected work guides and comparisons

Explore adhesives, grout, sealants and fixings

Browse all work types

Prepare your material measurements and product data

Mortar bag mix

Find material sheets for this calculator

Compare supplied alternatives and quantity changes

Browse all quantity scenarios