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Calcimator

Adobe Brick Calculator

Brick count from wall dimensions and brick size.

About this calculator

This calculator estimates how many adobe bricks a wall needs, along with the clay and sand volume to produce them. Bricks required is computed purely from the wall's FACE area (length times height) divided by each brick's own face area (brick length plus mortar joint, times brick height plus mortar joint) — Brick width never enters that calculation at all, since width is the brick's depth into the wall, not part of the face you're tiling. A wider mortar joint slightly reduces the brick count, the same direction as a longer or taller brick, because all three enlarge the face each brick covers.

Brick width only shows up downstream, in the clay and sand volume: because each brick's actual volume is length times width times height, a wider brick contains proportionally more material even though it doesn't change how many bricks you need. One thing this model does not do: it does not add separate clay or sand for the mortar joints themselves — the mix quantities scale purely with brick volume and count, so budget mortar material separately if your joints are wide or your wall is large.

Inputs

ft
ft
in
in
in
in
%

Results

Bricks required

362

Clay needed (cu yd)1.3
Sand needed (cu yd)3.04
How to Use This Calculator
  1. Enter Wall Length and Wall Height in feet to define the wall's face area.
  2. Input Brick Length and Height in inches for the face dimensions — these plus Mortar Joint set the brick count. Brick Width does not affect the count, only material volume.
  3. Set the Mortar Joint thickness (wider joints slightly reduce brick count) and Waste Factor %.
  4. Review Bricks Required to order or mold the correct quantity.
  5. Check Clay Needed and Sand Needed for material volume — note that mortar itself isn't added separately to these totals.

How the result changes with Wall length (ft)

Wall length (ft)Bricks required
10182
15272
30544
50906

What each input means

Wall length (ft)
Total wall length in feet.
Wall height (ft)
Wall height in feet.
Brick length (in)
Length of one adobe brick in inches (typical 14 in).
Brick height (in)
Height of one adobe brick in inches (typical 4 in).
Brick width (in)
Width / depth of one adobe brick in inches (typical 10 in).
Mortar joint (in)
Thickness of mortar joints between bricks.
Waste factor %
Percentage added for breakage and cutting waste.

What each result means

Bricks required
Total adobe bricks needed including waste.
Clay needed (cu yd)
Volume of clay soil required (~30% of mix).
Sand needed (cu yd)
Volume of sand required (~70% of mix).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Wall length (ft) = 20, Wall height (ft) = 8, Brick length (in) = 14, Brick height (in) = 4 = 7 input(s) provided
  2. Calculate Bricks required
    Bricks required = ceil(bricksNeeded * (1 + wastePct / 100))
    362 = 362
  3. Calculate Clay needed
    Clay needed = round((totalVolCuFt * 0.3) / 27 * 100) / 100
    1.3 = 1.3
  4. Calculate Sand needed
    Sand needed = round((totalVolCuFt * 0.7) / 27 * 100) / 100
    3.04 = 3.04

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.

Frequently Asked Questions

Does brick width (depth) change how many bricks I need?

No. Bricks Required comes only from the wall's face area divided by each brick's face area — brick length, brick height, and mortar joint thickness. Brick width is the brick's depth into the wall and never enters that face-area calculation, so a 10-inch and a 14-inch wide brick of the same length and height need the identical brick count.

Why does a wider mortar joint reduce the number of bricks I need?

Because a wider joint enlarges each brick's effective footprint on the wall face — mortar thickness is added to both brick length and brick height before they're multiplied to get one brick's coverage area. A bigger footprint per brick means fewer bricks are needed to cover the same wall.

If brick width doesn't affect the brick count, what does it affect?

Brick width sets each brick's actual volume (length times width times height), which drives Clay Needed and Sand Needed. A wider brick contains more material even though the wall still needs the same number of them, so widening the brick raises the clay and sand totals without changing Bricks Required.

Does this calculator account for the clay and sand used in the mortar joints themselves?

No. Clay Needed and Sand Needed scale only with brick volume and brick count — the mortar joints between bricks are not given their own separate material allowance. For a wall with thick joints or a large area, budget additional mortar material on top of this estimate.

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