Mortar Calculator
Enter your wall size to get the mortar bags you need, plus an estimated cost. Waste is included.
Mortar needed
Estimated cost
How to calculate mortar
Mortar follows the brick count. A standard brick wall needs about 7 bricks per square foot, and one bag of mortar lays about 35 bricks. Count the bricks first, then divide by 35.
Formula: bags = wall area (sq ft) × 7 × (1 + waste %) ÷ 35, rounded up
Worked example: 10 ft × 8 ft wall
Wall area = 10 × 8 = 80 sq ft. Bricks: 80 × 7 × 1.1 = 616 bricks. Bags: 616 ÷ 35 = 17.6, rounded up to 18 bags.
Which mix?
Type N is standard for most above-grade walls. Type S is stronger and used below grade and for structural work. Always follow your local code.
Common wall sizes
Cost tips
Prices on this page are editable estimates, not quotes. Get 2 to 3 local quotes before you buy, and ask if delivery is included. Delivery, tax and waste can change the total a lot. Order a little extra for cuts and breakage, and confirm final quantities with your supplier or a qualified professional.
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Frequently asked questions
How many mortar bags do I need for a 10x8 wall?
A 10 ft by 8 ft wall has 616 bricks with 10% waste, which needs 18 bags of mortar at 35 bricks per bag.
How many bricks does a bag of mortar lay?
About 35 standard bricks per bag, though it varies with joint size and waste.
What mix should I use?
Type N is standard for most walls. Type S is stronger for below-grade and structural work.
Does this include blocks?
No, this is for brick walls. Block walls use more mortar per unit, so check the block calculator notes.
Are the prices accurate?
Prices are editable estimates. The defaults are typical US figures, and your local price can be higher or lower.