Mortar Calculator
Bags of mortar from your unit counts — bricks, blocks, or both.
Common questions
How much mortar do I need?
The estimating standards: 7 × 80 lb bags per 1,000 modular bricks, or 3 bags per 100 standard blocks. Enter your counts above — mixed jobs add together.
How many bricks does one bag of mortar lay?
Roughly 140–150 modular bricks, or about 33 standard blocks, per 80 lb bag of mortar mix with standard ⅜" joints.
Mortar vs concrete vs cement — what's the difference?
Cement is the powder ingredient. Concrete is cement + sand + gravel — structural, poured. Mortar is cement + lime + sand — the glue between masonry units, softer by design so it, not the brick, absorbs movement.