Pointing Mortar Calculator

Repointing takes a fraction of the mortar that laying the same wall took, because only the outer skin of each joint is cut out and refilled. Give the wall size and the unit it is built in, or a length of joint you have measured with a tape, and set the joint width and how deep you are raking; the tool works out the linear feet of joint, the volume of the raked channel, the bags of mortar mix and a sand, cement and lime list for the type you pick. Brickwork at a three-eighths joint carries about six linear feet of joint for every square foot of face, which is why the head joints matter as much as the bed joints. The depth is the judgement call, so the result says whether yours meets the usual rule of twice the joint width and no less than five eighths of an inch.

Calculator Type
Measured In
This sets every measurement you type and every figure you get back. The bag sizes and the face sizes in the list are products and are named in their own units either way.

From the size of the wall and the unit it is built in.

Only read when the unit above is set to custom. Blank gives a modular brick in inches, or a 215 mm metric brick.
Only read when the unit above is set to custom. Blank gives a modular brick in inches, or a 65 mm metric brick.
Drop this for spot repairs, or to allow for windows and doors in the face.
Measure the existing joint. 3/8 inch is the common modern brick joint, and blank takes it.
At least twice the joint width, and never less than 5/8 inch. Leave it blank for 3/4 inch.
Mortar that stiffens on the hawk or drops down the wall. Repointing wastes more than laying does.
The figure printed on the bag, in the unit the bag prints it in: an 80 lb American bag says cubic feet and a 25 kg metric one says litres. Leave it blank for 0.675 cubic feet, or the 13.2 litres that is the same material in a 25 kg bag.
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Measured In
This sets every measurement you type and every figure you get back. The bag sizes and the face sizes in the list are products and are named in their own units either way.

When you have run a tape along the joints instead of measuring the wall.

Measure the existing joint. 3/8 inch is the common modern brick joint, and blank takes it.
At least twice the joint width, and never less than 5/8 inch. Leave it blank for 3/4 inch.
Mortar that stiffens on the hawk or drops down the wall. Repointing wastes more than laying does.
The figure printed on the bag, in the unit the bag prints it in: an 80 lb American bag says cubic feet and a 25 kg metric one says litres. Leave it blank for 0.675 cubic feet, or the 13.2 litres that is the same material in a 25 kg bag.
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