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Mortar Bags from Entered Brick or Block Yield

Round mortar bags up from masonry count and entered coverage per bag, then calculate total dry bag mass.

Calculator inputs

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Enter the known values in the units shown. Results update as you type.
Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
Use the worked example to check the method. Reset restores the starting fields.

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

At an assumed yield of 40 bricks per bag, 81 bricks require three whole bags. With 25 kg per bag, their combined dry mass is 75 kg.

Bags = ceiling(masonry count ÷ entered yield per bag); dry bag mass = bags × mass per bag

Enter these known values and leave the other values blank.

The initial yields of 40 bricks or 12 blocks per bag are editable examples. Replace them with the appropriate yield for the product, masonry dimensions and joint dimensions you intend to use.
Counts are positive whole numbers. Entered yield and bag mass are positive.
Bags round up to a whole number; mass is the dry mass of those bags, excluding mixing water. Waste is not added unless you include it in the entered masonry count or coverage assumption.
Whole-bag rounding loses information, so bag count does not uniquely recover masonry count or coverage.

No. Yield depends on the product, masonry size and joints. Use the manufacturer’s applicable coverage data.

The calculation rounds the quotient up. A positive fraction of another bag requires another whole bag in this purchasing model.

Bookify requires whole brick and block counts while retaining the entered coverage yield and upward bag rounding.