Mathematics is the queen of the sciences.C. F. Gauss

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Brick & block calculator

Masonry units and mortar for walls, minus door and window openings.

6

Enter known values

Fill in the fields below — the result will appear alongside.

Live construction diagram
L = 0 ftH = 0 ft
Brick
ft
ft
in
ft2
in
in
in
in
ft3

Formulas

Ag=LHA_g=LHAn=max⁡(0,Ag−Ao)A_n=\max(0,A_g-A_o)Vw=AntV_w=A_ntN=⌈Vw(l+j)(h+j)(b+j)(1+w/100)⌉N=\left\lceil\frac{V_w}{(l+j)(h+j)(b+j)}(1+w/100)\right\rceilNr=⌈H/(h+j)⌉N_r=\lceil H/(h+j)\rceilVm=Vw(1−Vu/Vmodule)V_m=V_w(1-V_u/V_{module})Nm=⌈Vm/Vb(1+w/100)⌉N_m=\lceil V_m/V_b(1+w/100)\rceil

How it works

Estimate bricks or blocks, rows, net wall area and mortar volume using actual unit dimensions, joint thickness, openings and waste.

Openings are subtracted from gross wall area. Unit count is based on the nominal module including joints; mortar is estimated from the difference between masonry and unit volume.

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